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:mod:`datetime` --- Basic date and time types
=============================================
.. module:: datetime
:synopsis: Basic date and time types.
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.. moduleauthor:: Tim Peters <tim@zope.com>
.. sectionauthor:: Tim Peters <tim@zope.com>
.. sectionauthor:: A.M. Kuchling <amk@amk.ca>
**Source code:** :source:`Lib/datetime.py`
--------------
.. XXX what order should the types be discussed in?
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The :mod:`datetime` module supplies classes for manipulating dates and times.
While date and time arithmetic is supported, the focus of the implementation is
on efficient attribute extraction for output formatting and manipulation.
.. seealso::
Module :mod:`calendar`
General calendar related functions.
Module :mod:`time`
Time access and conversions.
Module :mod:`zoneinfo`
Concrete time zones representing the IANA time zone database.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Package `dateutil <https://dateutil.readthedocs.io/en/stable/>`_
Third-party library with expanded time zone and parsing support.
.. _datetime-naive-aware:
Aware and Naive Objects
-----------------------
Date and time objects may be categorized as "aware" or "naive" depending on
whether or not they include timezone information.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
With sufficient knowledge of applicable algorithmic and political time
adjustments, such as time zone and daylight saving time information,
an **aware** object can locate itself relative to other aware objects.
An aware object represents a specific moment in time that is not open to
interpretation. [#]_
A **naive** object does not contain enough information to unambiguously locate
itself relative to other date/time objects. Whether a naive object represents
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Coordinated Universal Time (UTC), local time, or time in some other timezone is
purely up to the program, just like it is up to the program whether a
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
particular number represents metres, miles, or mass. Naive objects are easy to
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understand and to work with, at the cost of ignoring some aspects of reality.
For applications requiring aware objects, :class:`.datetime` and :class:`.time`
objects have an optional time zone information attribute, :attr:`!tzinfo`, that
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can be set to an instance of a subclass of the abstract :class:`tzinfo` class.
These :class:`tzinfo` objects capture information about the offset from UTC
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
time, the time zone name, and whether daylight saving time is in effect.
Only one concrete :class:`tzinfo` class, the :class:`timezone` class, is
supplied by the :mod:`datetime` module. The :class:`timezone` class can
represent simple timezones with fixed offsets from UTC, such as UTC itself or
North American EST and EDT timezones. Supporting timezones at deeper levels of
detail is up to the application. The rules for time adjustment across the
world are more political than rational, change frequently, and there is no
standard suitable for every application aside from UTC.
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Constants
---------
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The :mod:`datetime` module exports the following constants:
.. data:: MINYEAR
The smallest year number allowed in a :class:`date` or :class:`.datetime` object.
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:const:`MINYEAR` is ``1``.
.. data:: MAXYEAR
The largest year number allowed in a :class:`date` or :class:`.datetime` object.
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:const:`MAXYEAR` is ``9999``.
.. attribute:: UTC
Alias for the UTC timezone singleton :attr:`datetime.timezone.utc`.
.. versionadded:: 3.11
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Available Types
---------------
.. class:: date
Merged revisions 74779-74786,74793,74795,74811,74860-74861,74863,74876,74886,74896,74901,74903,74908,74912,74930,74933,74943,74946,74952-74955,75015,75019,75032,75068,75076,75095,75098,75102,75129,75139,75230 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74779 | michael.foord | 2009-09-13 11:13:36 -0500 (Sun, 13 Sep 2009) | 1 line Change to tutorial wording for reading text / binary files on Windows. Issue #6301. ........ r74780 | michael.foord | 2009-09-13 11:40:02 -0500 (Sun, 13 Sep 2009) | 1 line Objects that compare equal automatically pass or fail assertAlmostEqual and assertNotAlmostEqual tests on unittest.TestCase. Issue 6567. ........ r74781 | michael.foord | 2009-09-13 11:46:19 -0500 (Sun, 13 Sep 2009) | 1 line Note that sys._getframe is not guaranteed to exist in all implementations of Python, and a corresponding note in inspect.currentframe. Issue 6712. ........ r74782 | michael.foord | 2009-09-13 12:07:46 -0500 (Sun, 13 Sep 2009) | 1 line Tutorial tweaks. Issue 6849. ........ r74783 | michael.foord | 2009-09-13 12:28:35 -0500 (Sun, 13 Sep 2009) | 1 line unittest.TestLoader.loadTestsFromName honors the loader suiteClass attribute. Issue 6866. ........ r74784 | georg.brandl | 2009-09-13 13:15:07 -0500 (Sun, 13 Sep 2009) | 1 line Typo fix. ........ r74785 | michael.foord | 2009-09-13 14:07:03 -0500 (Sun, 13 Sep 2009) | 1 line Test discovery in unittest will only attempt to import modules that are importable; i.e. their names are valid Python identifiers. If an import fails during discovery this will be recorded as an error and test discovery will continue. Issue 6568. ........ r74786 | michael.foord | 2009-09-13 14:08:18 -0500 (Sun, 13 Sep 2009) | 1 line Remove an extraneous space in unittest documentation. ........ r74793 | georg.brandl | 2009-09-14 09:50:47 -0500 (Mon, 14 Sep 2009) | 1 line #6908: fix association of hashlib hash attributes. ........ r74795 | benjamin.peterson | 2009-09-14 22:36:26 -0500 (Mon, 14 Sep 2009) | 1 line Py_SetPythonHome uses static storage #6913 ........ r74811 | georg.brandl | 2009-09-15 15:26:59 -0500 (Tue, 15 Sep 2009) | 1 line Add Armin Ronacher. ........ r74860 | benjamin.peterson | 2009-09-16 21:46:54 -0500 (Wed, 16 Sep 2009) | 1 line kill bare except ........ r74861 | benjamin.peterson | 2009-09-16 22:18:28 -0500 (Wed, 16 Sep 2009) | 1 line pep 8 defaults ........ r74863 | benjamin.peterson | 2009-09-16 22:27:33 -0500 (Wed, 16 Sep 2009) | 1 line rationalize a bit ........ r74876 | georg.brandl | 2009-09-17 11:15:53 -0500 (Thu, 17 Sep 2009) | 1 line #6932: remove paragraph that advises relying on __del__ being called. ........ r74886 | benjamin.peterson | 2009-09-17 16:33:46 -0500 (Thu, 17 Sep 2009) | 1 line use macros ........ r74896 | georg.brandl | 2009-09-18 02:22:41 -0500 (Fri, 18 Sep 2009) | 1 line #6936: for interactive use, quit() is just fine. ........ r74901 | georg.brandl | 2009-09-18 04:14:52 -0500 (Fri, 18 Sep 2009) | 1 line #6905: use better exception messages in inspect when the argument is of the wrong type. ........ r74903 | georg.brandl | 2009-09-18 04:18:27 -0500 (Fri, 18 Sep 2009) | 1 line #6938: "ident" is always a string, so use a format code which works. ........ r74908 | georg.brandl | 2009-09-18 08:57:11 -0500 (Fri, 18 Sep 2009) | 1 line Use str.format() to fix beginner's mistake with %-style string formatting. ........ r74912 | georg.brandl | 2009-09-18 11:19:56 -0500 (Fri, 18 Sep 2009) | 1 line Optimize optimization and fix method name in docstring. ........ r74930 | georg.brandl | 2009-09-18 16:21:41 -0500 (Fri, 18 Sep 2009) | 1 line #6925: rewrite docs for locals() and vars() a bit. ........ r74933 | georg.brandl | 2009-09-18 16:35:59 -0500 (Fri, 18 Sep 2009) | 1 line #6930: clarify description about byteorder handling in UTF decoder routines. ........ r74943 | georg.brandl | 2009-09-19 02:35:07 -0500 (Sat, 19 Sep 2009) | 1 line #6944: the argument to PyArg_ParseTuple should be a tuple, otherwise a SystemError is set. Also clean up another usage of PyArg_ParseTuple. ........ r74946 | georg.brandl | 2009-09-19 03:43:16 -0500 (Sat, 19 Sep 2009) | 1 line Update bug tracker reference. ........ r74952 | georg.brandl | 2009-09-19 05:42:34 -0500 (Sat, 19 Sep 2009) | 1 line #6946: fix duplicate index entries for datetime classes. ........ r74953 | georg.brandl | 2009-09-19 07:04:16 -0500 (Sat, 19 Sep 2009) | 1 line Fix references to threading.enumerate(). ........ r74954 | georg.brandl | 2009-09-19 08:13:56 -0500 (Sat, 19 Sep 2009) | 1 line Add Doug. ........ r74955 | georg.brandl | 2009-09-19 08:20:49 -0500 (Sat, 19 Sep 2009) | 1 line Add Mark Summerfield. ........ r75015 | georg.brandl | 2009-09-22 05:55:08 -0500 (Tue, 22 Sep 2009) | 1 line Fix encoding name. ........ r75019 | vinay.sajip | 2009-09-22 12:23:41 -0500 (Tue, 22 Sep 2009) | 1 line Fixed a typo, and added sections on optimization and using arbitrary objects as messages. ........ r75032 | benjamin.peterson | 2009-09-22 17:15:28 -0500 (Tue, 22 Sep 2009) | 1 line fix typos/rephrase ........ r75068 | benjamin.peterson | 2009-09-25 21:57:59 -0500 (Fri, 25 Sep 2009) | 1 line comment out ugly xxx ........ r75076 | vinay.sajip | 2009-09-26 09:53:32 -0500 (Sat, 26 Sep 2009) | 1 line Tidied up name of parameter in StreamHandler ........ r75095 | michael.foord | 2009-09-27 14:15:41 -0500 (Sun, 27 Sep 2009) | 1 line Test creation moved from TestProgram.parseArgs to TestProgram.createTests exclusively. Issue 6956. ........ r75098 | michael.foord | 2009-09-27 15:08:23 -0500 (Sun, 27 Sep 2009) | 1 line Documentation improvement for load_tests protocol in unittest. Issue 6515. ........ r75102 | skip.montanaro | 2009-09-27 21:12:27 -0500 (Sun, 27 Sep 2009) | 3 lines Patch from Thomas Barr so that csv.Sniffer will set doublequote property. Closes issue 6606. ........ r75129 | vinay.sajip | 2009-09-29 02:08:54 -0500 (Tue, 29 Sep 2009) | 1 line Issue #7014: logging: Improved IronPython 2.6 compatibility. ........ r75139 | raymond.hettinger | 2009-09-29 13:53:24 -0500 (Tue, 29 Sep 2009) | 3 lines Issue 7008: Better document str.title and show how to work around the apostrophe problem. ........ r75230 | benjamin.peterson | 2009-10-04 08:38:38 -0500 (Sun, 04 Oct 2009) | 1 line test logging ........
2009-10-04 11:49:41 -03:00
:noindex:
2007-08-15 11:28:22 -03:00
An idealized naive date, assuming the current Gregorian calendar always was, and
always will be, in effect. Attributes: :attr:`year`, :attr:`month`, and
:attr:`day`.
.. class:: time
Merged revisions 74779-74786,74793,74795,74811,74860-74861,74863,74876,74886,74896,74901,74903,74908,74912,74930,74933,74943,74946,74952-74955,75015,75019,75032,75068,75076,75095,75098,75102,75129,75139,75230 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74779 | michael.foord | 2009-09-13 11:13:36 -0500 (Sun, 13 Sep 2009) | 1 line Change to tutorial wording for reading text / binary files on Windows. Issue #6301. ........ r74780 | michael.foord | 2009-09-13 11:40:02 -0500 (Sun, 13 Sep 2009) | 1 line Objects that compare equal automatically pass or fail assertAlmostEqual and assertNotAlmostEqual tests on unittest.TestCase. Issue 6567. ........ r74781 | michael.foord | 2009-09-13 11:46:19 -0500 (Sun, 13 Sep 2009) | 1 line Note that sys._getframe is not guaranteed to exist in all implementations of Python, and a corresponding note in inspect.currentframe. Issue 6712. ........ r74782 | michael.foord | 2009-09-13 12:07:46 -0500 (Sun, 13 Sep 2009) | 1 line Tutorial tweaks. Issue 6849. ........ r74783 | michael.foord | 2009-09-13 12:28:35 -0500 (Sun, 13 Sep 2009) | 1 line unittest.TestLoader.loadTestsFromName honors the loader suiteClass attribute. Issue 6866. ........ r74784 | georg.brandl | 2009-09-13 13:15:07 -0500 (Sun, 13 Sep 2009) | 1 line Typo fix. ........ r74785 | michael.foord | 2009-09-13 14:07:03 -0500 (Sun, 13 Sep 2009) | 1 line Test discovery in unittest will only attempt to import modules that are importable; i.e. their names are valid Python identifiers. If an import fails during discovery this will be recorded as an error and test discovery will continue. Issue 6568. ........ r74786 | michael.foord | 2009-09-13 14:08:18 -0500 (Sun, 13 Sep 2009) | 1 line Remove an extraneous space in unittest documentation. ........ r74793 | georg.brandl | 2009-09-14 09:50:47 -0500 (Mon, 14 Sep 2009) | 1 line #6908: fix association of hashlib hash attributes. ........ r74795 | benjamin.peterson | 2009-09-14 22:36:26 -0500 (Mon, 14 Sep 2009) | 1 line Py_SetPythonHome uses static storage #6913 ........ r74811 | georg.brandl | 2009-09-15 15:26:59 -0500 (Tue, 15 Sep 2009) | 1 line Add Armin Ronacher. ........ r74860 | benjamin.peterson | 2009-09-16 21:46:54 -0500 (Wed, 16 Sep 2009) | 1 line kill bare except ........ r74861 | benjamin.peterson | 2009-09-16 22:18:28 -0500 (Wed, 16 Sep 2009) | 1 line pep 8 defaults ........ r74863 | benjamin.peterson | 2009-09-16 22:27:33 -0500 (Wed, 16 Sep 2009) | 1 line rationalize a bit ........ r74876 | georg.brandl | 2009-09-17 11:15:53 -0500 (Thu, 17 Sep 2009) | 1 line #6932: remove paragraph that advises relying on __del__ being called. ........ r74886 | benjamin.peterson | 2009-09-17 16:33:46 -0500 (Thu, 17 Sep 2009) | 1 line use macros ........ r74896 | georg.brandl | 2009-09-18 02:22:41 -0500 (Fri, 18 Sep 2009) | 1 line #6936: for interactive use, quit() is just fine. ........ r74901 | georg.brandl | 2009-09-18 04:14:52 -0500 (Fri, 18 Sep 2009) | 1 line #6905: use better exception messages in inspect when the argument is of the wrong type. ........ r74903 | georg.brandl | 2009-09-18 04:18:27 -0500 (Fri, 18 Sep 2009) | 1 line #6938: "ident" is always a string, so use a format code which works. ........ r74908 | georg.brandl | 2009-09-18 08:57:11 -0500 (Fri, 18 Sep 2009) | 1 line Use str.format() to fix beginner's mistake with %-style string formatting. ........ r74912 | georg.brandl | 2009-09-18 11:19:56 -0500 (Fri, 18 Sep 2009) | 1 line Optimize optimization and fix method name in docstring. ........ r74930 | georg.brandl | 2009-09-18 16:21:41 -0500 (Fri, 18 Sep 2009) | 1 line #6925: rewrite docs for locals() and vars() a bit. ........ r74933 | georg.brandl | 2009-09-18 16:35:59 -0500 (Fri, 18 Sep 2009) | 1 line #6930: clarify description about byteorder handling in UTF decoder routines. ........ r74943 | georg.brandl | 2009-09-19 02:35:07 -0500 (Sat, 19 Sep 2009) | 1 line #6944: the argument to PyArg_ParseTuple should be a tuple, otherwise a SystemError is set. Also clean up another usage of PyArg_ParseTuple. ........ r74946 | georg.brandl | 2009-09-19 03:43:16 -0500 (Sat, 19 Sep 2009) | 1 line Update bug tracker reference. ........ r74952 | georg.brandl | 2009-09-19 05:42:34 -0500 (Sat, 19 Sep 2009) | 1 line #6946: fix duplicate index entries for datetime classes. ........ r74953 | georg.brandl | 2009-09-19 07:04:16 -0500 (Sat, 19 Sep 2009) | 1 line Fix references to threading.enumerate(). ........ r74954 | georg.brandl | 2009-09-19 08:13:56 -0500 (Sat, 19 Sep 2009) | 1 line Add Doug. ........ r74955 | georg.brandl | 2009-09-19 08:20:49 -0500 (Sat, 19 Sep 2009) | 1 line Add Mark Summerfield. ........ r75015 | georg.brandl | 2009-09-22 05:55:08 -0500 (Tue, 22 Sep 2009) | 1 line Fix encoding name. ........ r75019 | vinay.sajip | 2009-09-22 12:23:41 -0500 (Tue, 22 Sep 2009) | 1 line Fixed a typo, and added sections on optimization and using arbitrary objects as messages. ........ r75032 | benjamin.peterson | 2009-09-22 17:15:28 -0500 (Tue, 22 Sep 2009) | 1 line fix typos/rephrase ........ r75068 | benjamin.peterson | 2009-09-25 21:57:59 -0500 (Fri, 25 Sep 2009) | 1 line comment out ugly xxx ........ r75076 | vinay.sajip | 2009-09-26 09:53:32 -0500 (Sat, 26 Sep 2009) | 1 line Tidied up name of parameter in StreamHandler ........ r75095 | michael.foord | 2009-09-27 14:15:41 -0500 (Sun, 27 Sep 2009) | 1 line Test creation moved from TestProgram.parseArgs to TestProgram.createTests exclusively. Issue 6956. ........ r75098 | michael.foord | 2009-09-27 15:08:23 -0500 (Sun, 27 Sep 2009) | 1 line Documentation improvement for load_tests protocol in unittest. Issue 6515. ........ r75102 | skip.montanaro | 2009-09-27 21:12:27 -0500 (Sun, 27 Sep 2009) | 3 lines Patch from Thomas Barr so that csv.Sniffer will set doublequote property. Closes issue 6606. ........ r75129 | vinay.sajip | 2009-09-29 02:08:54 -0500 (Tue, 29 Sep 2009) | 1 line Issue #7014: logging: Improved IronPython 2.6 compatibility. ........ r75139 | raymond.hettinger | 2009-09-29 13:53:24 -0500 (Tue, 29 Sep 2009) | 3 lines Issue 7008: Better document str.title and show how to work around the apostrophe problem. ........ r75230 | benjamin.peterson | 2009-10-04 08:38:38 -0500 (Sun, 04 Oct 2009) | 1 line test logging ........
2009-10-04 11:49:41 -03:00
:noindex:
2007-08-15 11:28:22 -03:00
An idealized time, independent of any particular day, assuming that every day
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
has exactly 24\*60\*60 seconds. (There is no notion of "leap seconds" here.)
2007-08-15 11:28:22 -03:00
Attributes: :attr:`hour`, :attr:`minute`, :attr:`second`, :attr:`microsecond`,
and :attr:`.tzinfo`.
2007-08-15 11:28:22 -03:00
.. class:: datetime
Merged revisions 74779-74786,74793,74795,74811,74860-74861,74863,74876,74886,74896,74901,74903,74908,74912,74930,74933,74943,74946,74952-74955,75015,75019,75032,75068,75076,75095,75098,75102,75129,75139,75230 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74779 | michael.foord | 2009-09-13 11:13:36 -0500 (Sun, 13 Sep 2009) | 1 line Change to tutorial wording for reading text / binary files on Windows. Issue #6301. ........ r74780 | michael.foord | 2009-09-13 11:40:02 -0500 (Sun, 13 Sep 2009) | 1 line Objects that compare equal automatically pass or fail assertAlmostEqual and assertNotAlmostEqual tests on unittest.TestCase. Issue 6567. ........ r74781 | michael.foord | 2009-09-13 11:46:19 -0500 (Sun, 13 Sep 2009) | 1 line Note that sys._getframe is not guaranteed to exist in all implementations of Python, and a corresponding note in inspect.currentframe. Issue 6712. ........ r74782 | michael.foord | 2009-09-13 12:07:46 -0500 (Sun, 13 Sep 2009) | 1 line Tutorial tweaks. Issue 6849. ........ r74783 | michael.foord | 2009-09-13 12:28:35 -0500 (Sun, 13 Sep 2009) | 1 line unittest.TestLoader.loadTestsFromName honors the loader suiteClass attribute. Issue 6866. ........ r74784 | georg.brandl | 2009-09-13 13:15:07 -0500 (Sun, 13 Sep 2009) | 1 line Typo fix. ........ r74785 | michael.foord | 2009-09-13 14:07:03 -0500 (Sun, 13 Sep 2009) | 1 line Test discovery in unittest will only attempt to import modules that are importable; i.e. their names are valid Python identifiers. If an import fails during discovery this will be recorded as an error and test discovery will continue. Issue 6568. ........ r74786 | michael.foord | 2009-09-13 14:08:18 -0500 (Sun, 13 Sep 2009) | 1 line Remove an extraneous space in unittest documentation. ........ r74793 | georg.brandl | 2009-09-14 09:50:47 -0500 (Mon, 14 Sep 2009) | 1 line #6908: fix association of hashlib hash attributes. ........ r74795 | benjamin.peterson | 2009-09-14 22:36:26 -0500 (Mon, 14 Sep 2009) | 1 line Py_SetPythonHome uses static storage #6913 ........ r74811 | georg.brandl | 2009-09-15 15:26:59 -0500 (Tue, 15 Sep 2009) | 1 line Add Armin Ronacher. ........ r74860 | benjamin.peterson | 2009-09-16 21:46:54 -0500 (Wed, 16 Sep 2009) | 1 line kill bare except ........ r74861 | benjamin.peterson | 2009-09-16 22:18:28 -0500 (Wed, 16 Sep 2009) | 1 line pep 8 defaults ........ r74863 | benjamin.peterson | 2009-09-16 22:27:33 -0500 (Wed, 16 Sep 2009) | 1 line rationalize a bit ........ r74876 | georg.brandl | 2009-09-17 11:15:53 -0500 (Thu, 17 Sep 2009) | 1 line #6932: remove paragraph that advises relying on __del__ being called. ........ r74886 | benjamin.peterson | 2009-09-17 16:33:46 -0500 (Thu, 17 Sep 2009) | 1 line use macros ........ r74896 | georg.brandl | 2009-09-18 02:22:41 -0500 (Fri, 18 Sep 2009) | 1 line #6936: for interactive use, quit() is just fine. ........ r74901 | georg.brandl | 2009-09-18 04:14:52 -0500 (Fri, 18 Sep 2009) | 1 line #6905: use better exception messages in inspect when the argument is of the wrong type. ........ r74903 | georg.brandl | 2009-09-18 04:18:27 -0500 (Fri, 18 Sep 2009) | 1 line #6938: "ident" is always a string, so use a format code which works. ........ r74908 | georg.brandl | 2009-09-18 08:57:11 -0500 (Fri, 18 Sep 2009) | 1 line Use str.format() to fix beginner's mistake with %-style string formatting. ........ r74912 | georg.brandl | 2009-09-18 11:19:56 -0500 (Fri, 18 Sep 2009) | 1 line Optimize optimization and fix method name in docstring. ........ r74930 | georg.brandl | 2009-09-18 16:21:41 -0500 (Fri, 18 Sep 2009) | 1 line #6925: rewrite docs for locals() and vars() a bit. ........ r74933 | georg.brandl | 2009-09-18 16:35:59 -0500 (Fri, 18 Sep 2009) | 1 line #6930: clarify description about byteorder handling in UTF decoder routines. ........ r74943 | georg.brandl | 2009-09-19 02:35:07 -0500 (Sat, 19 Sep 2009) | 1 line #6944: the argument to PyArg_ParseTuple should be a tuple, otherwise a SystemError is set. Also clean up another usage of PyArg_ParseTuple. ........ r74946 | georg.brandl | 2009-09-19 03:43:16 -0500 (Sat, 19 Sep 2009) | 1 line Update bug tracker reference. ........ r74952 | georg.brandl | 2009-09-19 05:42:34 -0500 (Sat, 19 Sep 2009) | 1 line #6946: fix duplicate index entries for datetime classes. ........ r74953 | georg.brandl | 2009-09-19 07:04:16 -0500 (Sat, 19 Sep 2009) | 1 line Fix references to threading.enumerate(). ........ r74954 | georg.brandl | 2009-09-19 08:13:56 -0500 (Sat, 19 Sep 2009) | 1 line Add Doug. ........ r74955 | georg.brandl | 2009-09-19 08:20:49 -0500 (Sat, 19 Sep 2009) | 1 line Add Mark Summerfield. ........ r75015 | georg.brandl | 2009-09-22 05:55:08 -0500 (Tue, 22 Sep 2009) | 1 line Fix encoding name. ........ r75019 | vinay.sajip | 2009-09-22 12:23:41 -0500 (Tue, 22 Sep 2009) | 1 line Fixed a typo, and added sections on optimization and using arbitrary objects as messages. ........ r75032 | benjamin.peterson | 2009-09-22 17:15:28 -0500 (Tue, 22 Sep 2009) | 1 line fix typos/rephrase ........ r75068 | benjamin.peterson | 2009-09-25 21:57:59 -0500 (Fri, 25 Sep 2009) | 1 line comment out ugly xxx ........ r75076 | vinay.sajip | 2009-09-26 09:53:32 -0500 (Sat, 26 Sep 2009) | 1 line Tidied up name of parameter in StreamHandler ........ r75095 | michael.foord | 2009-09-27 14:15:41 -0500 (Sun, 27 Sep 2009) | 1 line Test creation moved from TestProgram.parseArgs to TestProgram.createTests exclusively. Issue 6956. ........ r75098 | michael.foord | 2009-09-27 15:08:23 -0500 (Sun, 27 Sep 2009) | 1 line Documentation improvement for load_tests protocol in unittest. Issue 6515. ........ r75102 | skip.montanaro | 2009-09-27 21:12:27 -0500 (Sun, 27 Sep 2009) | 3 lines Patch from Thomas Barr so that csv.Sniffer will set doublequote property. Closes issue 6606. ........ r75129 | vinay.sajip | 2009-09-29 02:08:54 -0500 (Tue, 29 Sep 2009) | 1 line Issue #7014: logging: Improved IronPython 2.6 compatibility. ........ r75139 | raymond.hettinger | 2009-09-29 13:53:24 -0500 (Tue, 29 Sep 2009) | 3 lines Issue 7008: Better document str.title and show how to work around the apostrophe problem. ........ r75230 | benjamin.peterson | 2009-10-04 08:38:38 -0500 (Sun, 04 Oct 2009) | 1 line test logging ........
2009-10-04 11:49:41 -03:00
:noindex:
2007-08-15 11:28:22 -03:00
A combination of a date and a time. Attributes: :attr:`year`, :attr:`month`,
:attr:`day`, :attr:`hour`, :attr:`minute`, :attr:`second`, :attr:`microsecond`,
and :attr:`.tzinfo`.
2007-08-15 11:28:22 -03:00
.. class:: timedelta
Merged revisions 74779-74786,74793,74795,74811,74860-74861,74863,74876,74886,74896,74901,74903,74908,74912,74930,74933,74943,74946,74952-74955,75015,75019,75032,75068,75076,75095,75098,75102,75129,75139,75230 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74779 | michael.foord | 2009-09-13 11:13:36 -0500 (Sun, 13 Sep 2009) | 1 line Change to tutorial wording for reading text / binary files on Windows. Issue #6301. ........ r74780 | michael.foord | 2009-09-13 11:40:02 -0500 (Sun, 13 Sep 2009) | 1 line Objects that compare equal automatically pass or fail assertAlmostEqual and assertNotAlmostEqual tests on unittest.TestCase. Issue 6567. ........ r74781 | michael.foord | 2009-09-13 11:46:19 -0500 (Sun, 13 Sep 2009) | 1 line Note that sys._getframe is not guaranteed to exist in all implementations of Python, and a corresponding note in inspect.currentframe. Issue 6712. ........ r74782 | michael.foord | 2009-09-13 12:07:46 -0500 (Sun, 13 Sep 2009) | 1 line Tutorial tweaks. Issue 6849. ........ r74783 | michael.foord | 2009-09-13 12:28:35 -0500 (Sun, 13 Sep 2009) | 1 line unittest.TestLoader.loadTestsFromName honors the loader suiteClass attribute. Issue 6866. ........ r74784 | georg.brandl | 2009-09-13 13:15:07 -0500 (Sun, 13 Sep 2009) | 1 line Typo fix. ........ r74785 | michael.foord | 2009-09-13 14:07:03 -0500 (Sun, 13 Sep 2009) | 1 line Test discovery in unittest will only attempt to import modules that are importable; i.e. their names are valid Python identifiers. If an import fails during discovery this will be recorded as an error and test discovery will continue. Issue 6568. ........ r74786 | michael.foord | 2009-09-13 14:08:18 -0500 (Sun, 13 Sep 2009) | 1 line Remove an extraneous space in unittest documentation. ........ r74793 | georg.brandl | 2009-09-14 09:50:47 -0500 (Mon, 14 Sep 2009) | 1 line #6908: fix association of hashlib hash attributes. ........ r74795 | benjamin.peterson | 2009-09-14 22:36:26 -0500 (Mon, 14 Sep 2009) | 1 line Py_SetPythonHome uses static storage #6913 ........ r74811 | georg.brandl | 2009-09-15 15:26:59 -0500 (Tue, 15 Sep 2009) | 1 line Add Armin Ronacher. ........ r74860 | benjamin.peterson | 2009-09-16 21:46:54 -0500 (Wed, 16 Sep 2009) | 1 line kill bare except ........ r74861 | benjamin.peterson | 2009-09-16 22:18:28 -0500 (Wed, 16 Sep 2009) | 1 line pep 8 defaults ........ r74863 | benjamin.peterson | 2009-09-16 22:27:33 -0500 (Wed, 16 Sep 2009) | 1 line rationalize a bit ........ r74876 | georg.brandl | 2009-09-17 11:15:53 -0500 (Thu, 17 Sep 2009) | 1 line #6932: remove paragraph that advises relying on __del__ being called. ........ r74886 | benjamin.peterson | 2009-09-17 16:33:46 -0500 (Thu, 17 Sep 2009) | 1 line use macros ........ r74896 | georg.brandl | 2009-09-18 02:22:41 -0500 (Fri, 18 Sep 2009) | 1 line #6936: for interactive use, quit() is just fine. ........ r74901 | georg.brandl | 2009-09-18 04:14:52 -0500 (Fri, 18 Sep 2009) | 1 line #6905: use better exception messages in inspect when the argument is of the wrong type. ........ r74903 | georg.brandl | 2009-09-18 04:18:27 -0500 (Fri, 18 Sep 2009) | 1 line #6938: "ident" is always a string, so use a format code which works. ........ r74908 | georg.brandl | 2009-09-18 08:57:11 -0500 (Fri, 18 Sep 2009) | 1 line Use str.format() to fix beginner's mistake with %-style string formatting. ........ r74912 | georg.brandl | 2009-09-18 11:19:56 -0500 (Fri, 18 Sep 2009) | 1 line Optimize optimization and fix method name in docstring. ........ r74930 | georg.brandl | 2009-09-18 16:21:41 -0500 (Fri, 18 Sep 2009) | 1 line #6925: rewrite docs for locals() and vars() a bit. ........ r74933 | georg.brandl | 2009-09-18 16:35:59 -0500 (Fri, 18 Sep 2009) | 1 line #6930: clarify description about byteorder handling in UTF decoder routines. ........ r74943 | georg.brandl | 2009-09-19 02:35:07 -0500 (Sat, 19 Sep 2009) | 1 line #6944: the argument to PyArg_ParseTuple should be a tuple, otherwise a SystemError is set. Also clean up another usage of PyArg_ParseTuple. ........ r74946 | georg.brandl | 2009-09-19 03:43:16 -0500 (Sat, 19 Sep 2009) | 1 line Update bug tracker reference. ........ r74952 | georg.brandl | 2009-09-19 05:42:34 -0500 (Sat, 19 Sep 2009) | 1 line #6946: fix duplicate index entries for datetime classes. ........ r74953 | georg.brandl | 2009-09-19 07:04:16 -0500 (Sat, 19 Sep 2009) | 1 line Fix references to threading.enumerate(). ........ r74954 | georg.brandl | 2009-09-19 08:13:56 -0500 (Sat, 19 Sep 2009) | 1 line Add Doug. ........ r74955 | georg.brandl | 2009-09-19 08:20:49 -0500 (Sat, 19 Sep 2009) | 1 line Add Mark Summerfield. ........ r75015 | georg.brandl | 2009-09-22 05:55:08 -0500 (Tue, 22 Sep 2009) | 1 line Fix encoding name. ........ r75019 | vinay.sajip | 2009-09-22 12:23:41 -0500 (Tue, 22 Sep 2009) | 1 line Fixed a typo, and added sections on optimization and using arbitrary objects as messages. ........ r75032 | benjamin.peterson | 2009-09-22 17:15:28 -0500 (Tue, 22 Sep 2009) | 1 line fix typos/rephrase ........ r75068 | benjamin.peterson | 2009-09-25 21:57:59 -0500 (Fri, 25 Sep 2009) | 1 line comment out ugly xxx ........ r75076 | vinay.sajip | 2009-09-26 09:53:32 -0500 (Sat, 26 Sep 2009) | 1 line Tidied up name of parameter in StreamHandler ........ r75095 | michael.foord | 2009-09-27 14:15:41 -0500 (Sun, 27 Sep 2009) | 1 line Test creation moved from TestProgram.parseArgs to TestProgram.createTests exclusively. Issue 6956. ........ r75098 | michael.foord | 2009-09-27 15:08:23 -0500 (Sun, 27 Sep 2009) | 1 line Documentation improvement for load_tests protocol in unittest. Issue 6515. ........ r75102 | skip.montanaro | 2009-09-27 21:12:27 -0500 (Sun, 27 Sep 2009) | 3 lines Patch from Thomas Barr so that csv.Sniffer will set doublequote property. Closes issue 6606. ........ r75129 | vinay.sajip | 2009-09-29 02:08:54 -0500 (Tue, 29 Sep 2009) | 1 line Issue #7014: logging: Improved IronPython 2.6 compatibility. ........ r75139 | raymond.hettinger | 2009-09-29 13:53:24 -0500 (Tue, 29 Sep 2009) | 3 lines Issue 7008: Better document str.title and show how to work around the apostrophe problem. ........ r75230 | benjamin.peterson | 2009-10-04 08:38:38 -0500 (Sun, 04 Oct 2009) | 1 line test logging ........
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:noindex:
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A duration expressing the difference between two :class:`date`, :class:`.time`,
or :class:`.datetime` instances to microsecond resolution.
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.. class:: tzinfo
:noindex:
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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An abstract base class for time zone information objects. These are used by the
:class:`.datetime` and :class:`.time` classes to provide a customizable notion of
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time adjustment (for example, to account for time zone and/or daylight saving
time).
.. class:: timezone
:noindex:
A class that implements the :class:`tzinfo` abstract base class as a
fixed offset from the UTC.
.. versionadded:: 3.2
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Objects of these types are immutable.
Subclass relationships::
object
timedelta
tzinfo
timezone
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time
date
datetime
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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Common Properties
^^^^^^^^^^^^^^^^^
The :class:`date`, :class:`.datetime`, :class:`.time`, and :class:`timezone` types
share these common features:
- Objects of these types are immutable.
- Objects of these types are :term:`hashable`, meaning that they can be used as
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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dictionary keys.
- Objects of these types support efficient pickling via the :mod:`pickle` module.
Determining if an Object is Aware or Naive
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Objects of the :class:`date` type are always naive.
An object of type :class:`.time` or :class:`.datetime` may be aware or naive.
A :class:`.datetime` object *d* is aware if both of the following hold:
1. ``d.tzinfo`` is not ``None``
2. ``d.tzinfo.utcoffset(d)`` does not return ``None``
Otherwise, *d* is naive.
A :class:`.time` object *t* is aware if both of the following hold:
1. ``t.tzinfo`` is not ``None``
2. ``t.tzinfo.utcoffset(None)`` does not return ``None``.
Otherwise, *t* is naive.
The distinction between aware and naive doesn't apply to :class:`timedelta`
objects.
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.. _datetime-timedelta:
:class:`timedelta` Objects
--------------------------
A :class:`timedelta` object represents a duration, the difference between two
dates or times.
.. class:: timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
All arguments are optional and default to ``0``. Arguments may be integers
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or floats, and may be positive or negative.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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Only *days*, *seconds* and *microseconds* are stored internally.
Arguments are converted to those units:
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* A millisecond is converted to 1000 microseconds.
* A minute is converted to 60 seconds.
* An hour is converted to 3600 seconds.
* A week is converted to 7 days.
and days, seconds and microseconds are then normalized so that the
representation is unique, with
* ``0 <= microseconds < 1000000``
* ``0 <= seconds < 3600*24`` (the number of seconds in one day)
* ``-999999999 <= days <= 999999999``
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The following example illustrates how any arguments besides
*days*, *seconds* and *microseconds* are "merged" and normalized into those
three resulting attributes::
>>> from datetime import timedelta
>>> delta = timedelta(
... days=50,
... seconds=27,
... microseconds=10,
... milliseconds=29000,
... minutes=5,
... hours=8,
... weeks=2
... )
>>> # Only days, seconds, and microseconds remain
>>> delta
datetime.timedelta(days=64, seconds=29156, microseconds=10)
If any argument is a float and there are fractional microseconds,
the fractional microseconds left over from all arguments are
combined and their sum is rounded to the nearest microsecond using
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
round-half-to-even tiebreaker. If no argument is a float, the
conversion and normalization processes are exact (no information is
lost).
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If the normalized value of days lies outside the indicated range,
:exc:`OverflowError` is raised.
Note that normalization of negative values may be surprising at first. For
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
example::
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Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> from datetime import timedelta
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>>> d = timedelta(microseconds=-1)
>>> (d.days, d.seconds, d.microseconds)
(-1, 86399, 999999)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Class attributes:
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.. attribute:: timedelta.min
The most negative :class:`timedelta` object, ``timedelta(-999999999)``.
.. attribute:: timedelta.max
The most positive :class:`timedelta` object, ``timedelta(days=999999999,
hours=23, minutes=59, seconds=59, microseconds=999999)``.
.. attribute:: timedelta.resolution
The smallest possible difference between non-equal :class:`timedelta` objects,
``timedelta(microseconds=1)``.
Note that, because of normalization, ``timedelta.max`` > ``-timedelta.min``.
``-timedelta.max`` is not representable as a :class:`timedelta` object.
Instance attributes (read-only):
+------------------+--------------------------------------------+
| Attribute | Value |
+==================+============================================+
| ``days`` | Between -999999999 and 999999999 inclusive |
+------------------+--------------------------------------------+
| ``seconds`` | Between 0 and 86399 inclusive |
+------------------+--------------------------------------------+
| ``microseconds`` | Between 0 and 999999 inclusive |
+------------------+--------------------------------------------+
Supported operations:
.. XXX this table is too wide!
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+--------------------------------+-----------------------------------------------+
| Operation | Result |
+================================+===============================================+
| ``t1 = t2 + t3`` | Sum of *t2* and *t3*. Afterwards *t1*-*t2* == |
| | *t3* and *t1*-*t3* == *t2* are true. (1) |
+--------------------------------+-----------------------------------------------+
| ``t1 = t2 - t3`` | Difference of *t2* and *t3*. Afterwards *t1* |
| | == *t2* - *t3* and *t2* == *t1* + *t3* are |
| | true. (1)(6) |
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+--------------------------------+-----------------------------------------------+
| ``t1 = t2 * i or t1 = i * t2`` | Delta multiplied by an integer. |
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| | Afterwards *t1* // i == *t2* is true, |
| | provided ``i != 0``. |
+--------------------------------+-----------------------------------------------+
| | In general, *t1* \* i == *t1* \* (i-1) + *t1* |
| | is true. (1) |
+--------------------------------+-----------------------------------------------+
| ``t1 = t2 * f or t1 = f * t2`` | Delta multiplied by a float. The result is |
| | rounded to the nearest multiple of |
| | timedelta.resolution using round-half-to-even.|
+--------------------------------+-----------------------------------------------+
| ``f = t2 / t3`` | Division (3) of overall duration *t2* by |
| | interval unit *t3*. Returns a :class:`float` |
| | object. |
+--------------------------------+-----------------------------------------------+
| ``t1 = t2 / f or t1 = t2 / i`` | Delta divided by a float or an int. The result|
| | is rounded to the nearest multiple of |
| | timedelta.resolution using round-half-to-even.|
+--------------------------------+-----------------------------------------------+
| ``t1 = t2 // i`` or | The floor is computed and the remainder (if |
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
| ``t1 = t2 // t3`` | any) is thrown away. In the second case, an |
| | integer is returned. (3) |
+--------------------------------+-----------------------------------------------+
| ``t1 = t2 % t3`` | The remainder is computed as a |
| | :class:`timedelta` object. (3) |
+--------------------------------+-----------------------------------------------+
| ``q, r = divmod(t1, t2)`` | Computes the quotient and the remainder: |
| | ``q = t1 // t2`` (3) and ``r = t1 % t2``. |
| | q is an integer and r is a :class:`timedelta` |
| | object. |
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+--------------------------------+-----------------------------------------------+
| ``+t1`` | Returns a :class:`timedelta` object with the |
| | same value. (2) |
+--------------------------------+-----------------------------------------------+
| ``-t1`` | equivalent to |
| | :class:`timedelta`\ (-*t1.days*, |
| | -*t1.seconds*, -*t1.microseconds*), |
| | and to *t1*\* -1. (1)(4) |
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+--------------------------------+-----------------------------------------------+
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
| ``abs(t)`` | equivalent to +\ *t* when ``t.days >= 0``, |
| | and to -*t* when ``t.days < 0``. (2) |
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+--------------------------------+-----------------------------------------------+
| ``str(t)`` | Returns a string in the form |
| | ``[D day[s], ][H]H:MM:SS[.UUUUUU]``, where D |
| | is negative for negative ``t``. (5) |
+--------------------------------+-----------------------------------------------+
| ``repr(t)`` | Returns a string representation of the |
| | :class:`timedelta` object as a constructor |
| | call with canonical attribute values. |
+--------------------------------+-----------------------------------------------+
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Notes:
(1)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
This is exact but may overflow.
2007-08-15 11:28:22 -03:00
(2)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
This is exact and cannot overflow.
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(3)
Division by 0 raises :exc:`ZeroDivisionError`.
(4)
-*timedelta.max* is not representable as a :class:`timedelta` object.
(5)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
String representations of :class:`timedelta` objects are normalized
similarly to their internal representation. This leads to somewhat
unusual results for negative timedeltas. For example::
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> timedelta(hours=-5)
datetime.timedelta(days=-1, seconds=68400)
>>> print(_)
-1 day, 19:00:00
(6)
The expression ``t2 - t3`` will always be equal to the expression ``t2 + (-t3)`` except
when t3 is equal to ``timedelta.max``; in that case the former will produce a result
while the latter will overflow.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
In addition to the operations listed above, :class:`timedelta` objects support
certain additions and subtractions with :class:`date` and :class:`.datetime`
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objects (see below).
.. versionchanged:: 3.2
Floor division and true division of a :class:`timedelta` object by another
:class:`timedelta` object are now supported, as are remainder operations and
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
the :func:`divmod` function. True division and multiplication of a
:class:`timedelta` object by a :class:`float` object are now supported.
2007-08-15 11:28:22 -03:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Comparisons of :class:`timedelta` objects are supported, with some caveats.
The comparisons ``==`` or ``!=`` *always* return a :class:`bool`, no matter
the type of the compared object::
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> from datetime import timedelta
>>> delta1 = timedelta(seconds=57)
>>> delta2 = timedelta(hours=25, seconds=2)
>>> delta2 != delta1
True
>>> delta2 == 5
False
For all other comparisons (such as ``<`` and ``>``), when a :class:`timedelta`
object is compared to an object of a different type, :exc:`TypeError`
is raised::
>>> delta2 > delta1
True
>>> delta2 > 5
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: '>' not supported between instances of 'datetime.timedelta' and 'int'
In Boolean contexts, a :class:`timedelta` object is
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considered to be true if and only if it isn't equal to ``timedelta(0)``.
Instance methods:
.. method:: timedelta.total_seconds()
Return the total number of seconds contained in the duration. Equivalent to
``td / timedelta(seconds=1)``. For interval units other than seconds, use the
division form directly (e.g. ``td / timedelta(microseconds=1)``).
Note that for very large time intervals (greater than 270 years on
most platforms) this method will lose microsecond accuracy.
.. versionadded:: 3.2
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Examples of usage: :class:`timedelta`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
An additional example of normalization::
2009-01-03 17:18:54 -04:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> # Components of another_year add up to exactly 365 days
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> from datetime import timedelta
>>> year = timedelta(days=365)
2009-01-03 17:18:54 -04:00
>>> another_year = timedelta(weeks=40, days=84, hours=23,
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
... minutes=50, seconds=600)
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> year == another_year
True
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> year.total_seconds()
31536000.0
Examples of :class:`timedelta` arithmetic::
>>> from datetime import timedelta
>>> year = timedelta(days=365)
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> ten_years = 10 * year
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> ten_years
datetime.timedelta(days=3650)
>>> ten_years.days // 365
10
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> nine_years = ten_years - year
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> nine_years
datetime.timedelta(days=3285)
>>> three_years = nine_years // 3
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
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>>> three_years, three_years.days // 365
(datetime.timedelta(days=1095), 3)
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.. _datetime-date:
:class:`date` Objects
---------------------
A :class:`date` object represents a date (year, month and day) in an idealized
calendar, the current Gregorian calendar indefinitely extended in both
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
directions.
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
January 1 of year 1 is called day number 1, January 2 of year 1 is
called day number 2, and so on. [#]_
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.. class:: date(year, month, day)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
All arguments are required. Arguments must be integers, in the following
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ranges:
* ``MINYEAR <= year <= MAXYEAR``
* ``1 <= month <= 12``
* ``1 <= day <= number of days in the given month and year``
If an argument outside those ranges is given, :exc:`ValueError` is raised.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Other constructors, all class methods:
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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
.. classmethod:: date.today()
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return the current local date.
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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This is equivalent to ``date.fromtimestamp(time.time())``.
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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. classmethod:: date.fromtimestamp(timestamp)
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return the local date corresponding to the POSIX timestamp, such as is
returned by :func:`time.time`.
This may raise :exc:`OverflowError`, if the timestamp is out
of the range of values supported by the platform C :c:func:`localtime`
function, and :exc:`OSError` on :c:func:`localtime` failure.
It's common for this to be restricted to years from 1970 through 2038. Note
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that on non-POSIX systems that include leap seconds in their notion of a
timestamp, leap seconds are ignored by :meth:`fromtimestamp`.
.. versionchanged:: 3.3
Raise :exc:`OverflowError` instead of :exc:`ValueError` if the timestamp
is out of the range of values supported by the platform C
:c:func:`localtime` function. Raise :exc:`OSError` instead of
:exc:`ValueError` on :c:func:`localtime` failure.
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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. classmethod:: date.fromordinal(ordinal)
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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Return the date corresponding to the proleptic Gregorian ordinal, where
January 1 of year 1 has ordinal 1.
:exc:`ValueError` is raised unless ``1 <= ordinal <=
date.max.toordinal()``. For any date *d*,
``date.fromordinal(d.toordinal()) == d``.
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.. classmethod:: date.fromisoformat(date_string)
Return a :class:`date` corresponding to a *date_string* given in any valid
ISO 8601 format, except ordinal dates (e.g. ``YYYY-DDD``)::
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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>>> from datetime import date
>>> date.fromisoformat('2019-12-04')
datetime.date(2019, 12, 4)
>>> date.fromisoformat('20191204')
datetime.date(2019, 12, 4)
>>> date.fromisoformat('2021-W01-1')
datetime.date(2021, 1, 4)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
.. versionadded:: 3.7
.. versionchanged:: 3.11
Previously, this method only supported the format ``YYYY-MM-DD``.
.. classmethod:: date.fromisocalendar(year, week, day)
Return a :class:`date` corresponding to the ISO calendar date specified by
year, week and day. This is the inverse of the function :meth:`date.isocalendar`.
.. versionadded:: 3.8
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Class attributes:
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.. attribute:: date.min
The earliest representable date, ``date(MINYEAR, 1, 1)``.
.. attribute:: date.max
The latest representable date, ``date(MAXYEAR, 12, 31)``.
.. attribute:: date.resolution
The smallest possible difference between non-equal date objects,
``timedelta(days=1)``.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Instance attributes (read-only):
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.. attribute:: date.year
Between :const:`MINYEAR` and :const:`MAXYEAR` inclusive.
.. attribute:: date.month
Between 1 and 12 inclusive.
.. attribute:: date.day
Between 1 and the number of days in the given month of the given year.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Supported operations:
+-------------------------------+----------------------------------------------+
| Operation | Result |
+===============================+==============================================+
| ``date2 = date1 + timedelta`` | *date2* will be ``timedelta.days`` days |
| | after *date1*. (1) |
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+-------------------------------+----------------------------------------------+
| ``date2 = date1 - timedelta`` | Computes *date2* such that ``date2 + |
| | timedelta == date1``. (2) |
+-------------------------------+----------------------------------------------+
| ``timedelta = date1 - date2`` | \(3) |
+-------------------------------+----------------------------------------------+
| ``date1 < date2`` | *date1* is considered less than *date2* when |
| | *date1* precedes *date2* in time. (4) |
+-------------------------------+----------------------------------------------+
Notes:
(1)
*date2* is moved forward in time if ``timedelta.days > 0``, or backward if
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
``timedelta.days < 0``. Afterward ``date2 - date1 == timedelta.days``.
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``timedelta.seconds`` and ``timedelta.microseconds`` are ignored.
:exc:`OverflowError` is raised if ``date2.year`` would be smaller than
:const:`MINYEAR` or larger than :const:`MAXYEAR`.
(2)
``timedelta.seconds`` and ``timedelta.microseconds`` are ignored.
(3)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
This is exact, and cannot overflow. timedelta.seconds and
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timedelta.microseconds are 0, and date2 + timedelta == date1 after.
(4)
In other words, ``date1 < date2`` if and only if ``date1.toordinal() <
date2.toordinal()``. Date comparison raises :exc:`TypeError` if
the other comparand isn't also a :class:`date` object. However,
``NotImplemented`` is returned instead if the other comparand has a
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:meth:`timetuple` attribute. This hook gives other kinds of date objects a
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chance at implementing mixed-type comparison. If not, when a :class:`date`
object is compared to an object of a different type, :exc:`TypeError` is raised
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
unless the comparison is ``==`` or ``!=``. The latter cases return
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:const:`False` or :const:`True`, respectively.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
In Boolean contexts, all :class:`date` objects are considered to be true.
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Instance methods:
.. method:: date.replace(year=self.year, month=self.month, day=self.day)
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Return a date with the same value, except for those parameters given new
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
values by whichever keyword arguments are specified.
Example::
>>> from datetime import date
>>> d = date(2002, 12, 31)
>>> d.replace(day=26)
datetime.date(2002, 12, 26)
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.. method:: date.timetuple()
Return a :class:`time.struct_time` such as returned by :func:`time.localtime`.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The hours, minutes and seconds are 0, and the DST flag is -1.
``d.timetuple()`` is equivalent to::
time.struct_time((d.year, d.month, d.day, 0, 0, 0, d.weekday(), yday, -1))
where ``yday = d.toordinal() - date(d.year, 1, 1).toordinal() + 1``
is the day number within the current year starting with ``1`` for January 1st.
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.. method:: date.toordinal()
Return the proleptic Gregorian ordinal of the date, where January 1 of year 1
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
has ordinal 1. For any :class:`date` object *d*,
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``date.fromordinal(d.toordinal()) == d``.
.. method:: date.weekday()
Return the day of the week as an integer, where Monday is 0 and Sunday is 6.
For example, ``date(2002, 12, 4).weekday() == 2``, a Wednesday. See also
:meth:`isoweekday`.
.. method:: date.isoweekday()
Return the day of the week as an integer, where Monday is 1 and Sunday is 7.
For example, ``date(2002, 12, 4).isoweekday() == 3``, a Wednesday. See also
:meth:`weekday`, :meth:`isocalendar`.
.. method:: date.isocalendar()
Return a :term:`named tuple` object with three components: ``year``,
``week`` and ``weekday``.
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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The ISO calendar is a widely used variant of the Gregorian calendar. [#]_
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The ISO year consists of 52 or 53 full weeks, and where a week starts on a
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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Monday and ends on a Sunday. The first week of an ISO year is the first
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(Gregorian) calendar week of a year containing a Thursday. This is called week
number 1, and the ISO year of that Thursday is the same as its Gregorian year.
For example, 2004 begins on a Thursday, so the first week of ISO year 2004
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
begins on Monday, 29 Dec 2003 and ends on Sunday, 4 Jan 2004::
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>>> from datetime import date
>>> date(2003, 12, 29).isocalendar()
datetime.IsoCalendarDate(year=2004, week=1, weekday=1)
>>> date(2004, 1, 4).isocalendar()
datetime.IsoCalendarDate(year=2004, week=1, weekday=7)
.. versionchanged:: 3.9
Result changed from a tuple to a :term:`named tuple`.
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.. method:: date.isoformat()
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return a string representing the date in ISO 8601 format, ``YYYY-MM-DD``::
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> from datetime import date
>>> date(2002, 12, 4).isoformat()
'2002-12-04'
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.. method:: date.__str__()
For a date *d*, ``str(d)`` is equivalent to ``d.isoformat()``.
.. method:: date.ctime()
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return a string representing the date::
>>> from datetime import date
>>> date(2002, 12, 4).ctime()
'Wed Dec 4 00:00:00 2002'
``d.ctime()`` is equivalent to::
time.ctime(time.mktime(d.timetuple()))
on platforms where the native C
:c:func:`ctime` function (which :func:`time.ctime` invokes, but which
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:meth:`date.ctime` does not invoke) conforms to the C standard.
.. method:: date.strftime(format)
Return a string representing the date, controlled by an explicit format string.
Format codes referring to hours, minutes or seconds will see 0 values.
See also :ref:`strftime-strptime-behavior` and :meth:`date.isoformat`.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
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.. method:: date.__format__(format)
Same as :meth:`.date.strftime`. This makes it possible to specify a format
string for a :class:`.date` object in :ref:`formatted string
literals <f-strings>` and when using :meth:`str.format`.
See also :ref:`strftime-strptime-behavior` and :meth:`date.isoformat`.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Examples of Usage: :class:`date`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
Example of counting days to an event::
>>> import time
>>> from datetime import date
>>> today = date.today()
>>> today
datetime.date(2007, 12, 5)
>>> today == date.fromtimestamp(time.time())
True
>>> my_birthday = date(today.year, 6, 24)
>>> if my_birthday < today:
2009-01-03 17:18:54 -04:00
... my_birthday = my_birthday.replace(year=today.year + 1)
...
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> my_birthday
datetime.date(2008, 6, 24)
2009-01-03 17:18:54 -04:00
>>> time_to_birthday = abs(my_birthday - today)
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> time_to_birthday.days
202
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
More examples of working with :class:`date`:
Merged revisions 61724-61725,61731-61735,61737,61739,61741,61743-61744,61753,61761,61765-61767,61769,61773,61776-61778,61780-61783,61788,61793,61796,61807,61813 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r61724 | martin.v.loewis | 2008-03-22 01:01:12 +0100 (Sat, 22 Mar 2008) | 49 lines Merged revisions 61602-61723 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 M?\195?\164r 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 M?\195?\164r 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 M?\195?\164r 2008) | 2 lines Fix whitespace. ........ ................ r61725 | martin.v.loewis | 2008-03-22 01:02:41 +0100 (Sat, 22 Mar 2008) | 2 lines Install lib2to3. ................ r61731 | facundo.batista | 2008-03-22 03:45:37 +0100 (Sat, 22 Mar 2008) | 4 lines Small fix that complicated the test actually when that test failed. ................ r61732 | alexandre.vassalotti | 2008-03-22 05:08:44 +0100 (Sat, 22 Mar 2008) | 2 lines Added warning for the removal of 'hotshot' in Py3k. ................ r61733 | georg.brandl | 2008-03-22 11:07:29 +0100 (Sat, 22 Mar 2008) | 4 lines #1918: document that weak references *to* an object are cleared before the object's __del__ is called, to ensure that the weak reference callback (if any) finds the object healthy. ................ r61734 | georg.brandl | 2008-03-22 11:56:23 +0100 (Sat, 22 Mar 2008) | 2 lines Activate the Sphinx doctest extension and convert howto/functional to use it. ................ r61735 | georg.brandl | 2008-03-22 11:58:38 +0100 (Sat, 22 Mar 2008) | 2 lines Allow giving source names on the cmdline. ................ r61737 | georg.brandl | 2008-03-22 12:00:48 +0100 (Sat, 22 Mar 2008) | 2 lines Fixup this HOWTO's doctest blocks so that they can be run with sphinx' doctest builder. ................ r61739 | georg.brandl | 2008-03-22 12:47:10 +0100 (Sat, 22 Mar 2008) | 2 lines Test decimal.rst doctests as far as possible with sphinx doctest. ................ r61741 | georg.brandl | 2008-03-22 13:04:26 +0100 (Sat, 22 Mar 2008) | 2 lines Make doctests in re docs usable with sphinx' doctest. ................ r61743 | georg.brandl | 2008-03-22 13:59:37 +0100 (Sat, 22 Mar 2008) | 2 lines Make more doctests in pprint docs testable. ................ r61744 | georg.brandl | 2008-03-22 14:07:06 +0100 (Sat, 22 Mar 2008) | 2 lines No need to specify explicit "doctest_block" anymore. ................ r61753 | georg.brandl | 2008-03-22 21:08:43 +0100 (Sat, 22 Mar 2008) | 2 lines Fix-up syntax problems. ................ r61761 | georg.brandl | 2008-03-22 22:06:20 +0100 (Sat, 22 Mar 2008) | 4 lines Make collections' doctests executable. (The <BLANKLINE>s will be stripped from presentation output.) ................ r61765 | georg.brandl | 2008-03-22 22:21:57 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in datetime docs. ................ r61766 | georg.brandl | 2008-03-22 22:26:44 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in operator docs. ................ r61767 | georg.brandl | 2008-03-22 22:38:33 +0100 (Sat, 22 Mar 2008) | 2 lines Enable doctests in functions.rst. Already found two errors :) ................ r61769 | georg.brandl | 2008-03-22 23:04:10 +0100 (Sat, 22 Mar 2008) | 3 lines Enable doctest running for several other documents. We have now over 640 doctests that are run with "make doctest". ................ r61773 | raymond.hettinger | 2008-03-23 01:55:46 +0100 (Sun, 23 Mar 2008) | 1 line Simplify demo code. ................ r61776 | neal.norwitz | 2008-03-23 04:43:33 +0100 (Sun, 23 Mar 2008) | 7 lines Try to make this test a little more robust and not fail with: timeout (10.0025) is more than 2 seconds more than expected (0.001) I'm assuming this problem is caused by DNS lookup. This change does a DNS lookup of the hostname before trying to connect, so the time is not included. ................ r61777 | neal.norwitz | 2008-03-23 05:08:30 +0100 (Sun, 23 Mar 2008) | 1 line Speed up the test by avoiding socket timeouts. ................ r61778 | neal.norwitz | 2008-03-23 05:43:09 +0100 (Sun, 23 Mar 2008) | 1 line Skip the epoll test if epoll() does not work ................ r61780 | neal.norwitz | 2008-03-23 06:47:20 +0100 (Sun, 23 Mar 2008) | 1 line Suppress failure (to avoid a flaky test) if we cannot connect to svn.python.org ................ r61781 | neal.norwitz | 2008-03-23 07:13:25 +0100 (Sun, 23 Mar 2008) | 4 lines Move itertools before future_builtins since the latter depends on the former. From a clean build importing future_builtins would fail since itertools wasn't built yet. ................ r61782 | neal.norwitz | 2008-03-23 07:16:04 +0100 (Sun, 23 Mar 2008) | 1 line Try to prevent the alarm going off early in tearDown ................ r61783 | neal.norwitz | 2008-03-23 07:19:57 +0100 (Sun, 23 Mar 2008) | 4 lines Remove compiler warnings (on Alpha at least) about using chars as array subscripts. Using chars are dangerous b/c they are signed on some platforms and unsigned on others. ................ r61788 | georg.brandl | 2008-03-23 09:05:30 +0100 (Sun, 23 Mar 2008) | 2 lines Make the doctests presentation-friendlier. ................ r61793 | amaury.forgeotdarc | 2008-03-23 10:55:29 +0100 (Sun, 23 Mar 2008) | 4 lines #1477: ur'\U0010FFFF' raised in narrow unicode builds. Corrected the raw-unicode-escape codec to use UTF-16 surrogates in this case, just like the unicode-escape codec. ................ r61796 | raymond.hettinger | 2008-03-23 14:32:32 +0100 (Sun, 23 Mar 2008) | 1 line Issue 1681432: Add triangular distribution the random module. ................ r61807 | raymond.hettinger | 2008-03-23 20:37:53 +0100 (Sun, 23 Mar 2008) | 4 lines Adopt Nick's suggestion for useful default arguments. Clean-up floating point issues by adding true division and float constants. ................ r61813 | gregory.p.smith | 2008-03-23 22:04:43 +0100 (Sun, 23 Mar 2008) | 6 lines Fix gzip to deal with CRC's being signed values in Python 2.x properly and to read 32bit values as unsigned to start with rather than applying signedness fixups allover the place afterwards. This hopefully fixes the test_tarfile failure on the alpha/tru64 buildbot. ................
2008-03-23 18:54:12 -03:00
.. doctest::
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> from datetime import date
>>> d = date.fromordinal(730920) # 730920th day after 1. 1. 0001
>>> d
datetime.date(2002, 3, 11)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> # Methods related to formatting string output
>>> d.isoformat()
'2002-03-11'
>>> d.strftime("%d/%m/%y")
'11/03/02'
>>> d.strftime("%A %d. %B %Y")
'Monday 11. March 2002'
>>> d.ctime()
'Mon Mar 11 00:00:00 2002'
>>> 'The {1} is {0:%d}, the {2} is {0:%B}.'.format(d, "day", "month")
'The day is 11, the month is March.'
>>> # Methods for to extracting 'components' under different calendars
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> t = d.timetuple()
Merged revisions 61724-61725,61731-61735,61737,61739,61741,61743-61744,61753,61761,61765-61767,61769,61773,61776-61778,61780-61783,61788,61793,61796,61807,61813 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r61724 | martin.v.loewis | 2008-03-22 01:01:12 +0100 (Sat, 22 Mar 2008) | 49 lines Merged revisions 61602-61723 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 M?\195?\164r 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 M?\195?\164r 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 M?\195?\164r 2008) | 2 lines Fix whitespace. ........ ................ r61725 | martin.v.loewis | 2008-03-22 01:02:41 +0100 (Sat, 22 Mar 2008) | 2 lines Install lib2to3. ................ r61731 | facundo.batista | 2008-03-22 03:45:37 +0100 (Sat, 22 Mar 2008) | 4 lines Small fix that complicated the test actually when that test failed. ................ r61732 | alexandre.vassalotti | 2008-03-22 05:08:44 +0100 (Sat, 22 Mar 2008) | 2 lines Added warning for the removal of 'hotshot' in Py3k. ................ r61733 | georg.brandl | 2008-03-22 11:07:29 +0100 (Sat, 22 Mar 2008) | 4 lines #1918: document that weak references *to* an object are cleared before the object's __del__ is called, to ensure that the weak reference callback (if any) finds the object healthy. ................ r61734 | georg.brandl | 2008-03-22 11:56:23 +0100 (Sat, 22 Mar 2008) | 2 lines Activate the Sphinx doctest extension and convert howto/functional to use it. ................ r61735 | georg.brandl | 2008-03-22 11:58:38 +0100 (Sat, 22 Mar 2008) | 2 lines Allow giving source names on the cmdline. ................ r61737 | georg.brandl | 2008-03-22 12:00:48 +0100 (Sat, 22 Mar 2008) | 2 lines Fixup this HOWTO's doctest blocks so that they can be run with sphinx' doctest builder. ................ r61739 | georg.brandl | 2008-03-22 12:47:10 +0100 (Sat, 22 Mar 2008) | 2 lines Test decimal.rst doctests as far as possible with sphinx doctest. ................ r61741 | georg.brandl | 2008-03-22 13:04:26 +0100 (Sat, 22 Mar 2008) | 2 lines Make doctests in re docs usable with sphinx' doctest. ................ r61743 | georg.brandl | 2008-03-22 13:59:37 +0100 (Sat, 22 Mar 2008) | 2 lines Make more doctests in pprint docs testable. ................ r61744 | georg.brandl | 2008-03-22 14:07:06 +0100 (Sat, 22 Mar 2008) | 2 lines No need to specify explicit "doctest_block" anymore. ................ r61753 | georg.brandl | 2008-03-22 21:08:43 +0100 (Sat, 22 Mar 2008) | 2 lines Fix-up syntax problems. ................ r61761 | georg.brandl | 2008-03-22 22:06:20 +0100 (Sat, 22 Mar 2008) | 4 lines Make collections' doctests executable. (The <BLANKLINE>s will be stripped from presentation output.) ................ r61765 | georg.brandl | 2008-03-22 22:21:57 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in datetime docs. ................ r61766 | georg.brandl | 2008-03-22 22:26:44 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in operator docs. ................ r61767 | georg.brandl | 2008-03-22 22:38:33 +0100 (Sat, 22 Mar 2008) | 2 lines Enable doctests in functions.rst. Already found two errors :) ................ r61769 | georg.brandl | 2008-03-22 23:04:10 +0100 (Sat, 22 Mar 2008) | 3 lines Enable doctest running for several other documents. We have now over 640 doctests that are run with "make doctest". ................ r61773 | raymond.hettinger | 2008-03-23 01:55:46 +0100 (Sun, 23 Mar 2008) | 1 line Simplify demo code. ................ r61776 | neal.norwitz | 2008-03-23 04:43:33 +0100 (Sun, 23 Mar 2008) | 7 lines Try to make this test a little more robust and not fail with: timeout (10.0025) is more than 2 seconds more than expected (0.001) I'm assuming this problem is caused by DNS lookup. This change does a DNS lookup of the hostname before trying to connect, so the time is not included. ................ r61777 | neal.norwitz | 2008-03-23 05:08:30 +0100 (Sun, 23 Mar 2008) | 1 line Speed up the test by avoiding socket timeouts. ................ r61778 | neal.norwitz | 2008-03-23 05:43:09 +0100 (Sun, 23 Mar 2008) | 1 line Skip the epoll test if epoll() does not work ................ r61780 | neal.norwitz | 2008-03-23 06:47:20 +0100 (Sun, 23 Mar 2008) | 1 line Suppress failure (to avoid a flaky test) if we cannot connect to svn.python.org ................ r61781 | neal.norwitz | 2008-03-23 07:13:25 +0100 (Sun, 23 Mar 2008) | 4 lines Move itertools before future_builtins since the latter depends on the former. From a clean build importing future_builtins would fail since itertools wasn't built yet. ................ r61782 | neal.norwitz | 2008-03-23 07:16:04 +0100 (Sun, 23 Mar 2008) | 1 line Try to prevent the alarm going off early in tearDown ................ r61783 | neal.norwitz | 2008-03-23 07:19:57 +0100 (Sun, 23 Mar 2008) | 4 lines Remove compiler warnings (on Alpha at least) about using chars as array subscripts. Using chars are dangerous b/c they are signed on some platforms and unsigned on others. ................ r61788 | georg.brandl | 2008-03-23 09:05:30 +0100 (Sun, 23 Mar 2008) | 2 lines Make the doctests presentation-friendlier. ................ r61793 | amaury.forgeotdarc | 2008-03-23 10:55:29 +0100 (Sun, 23 Mar 2008) | 4 lines #1477: ur'\U0010FFFF' raised in narrow unicode builds. Corrected the raw-unicode-escape codec to use UTF-16 surrogates in this case, just like the unicode-escape codec. ................ r61796 | raymond.hettinger | 2008-03-23 14:32:32 +0100 (Sun, 23 Mar 2008) | 1 line Issue 1681432: Add triangular distribution the random module. ................ r61807 | raymond.hettinger | 2008-03-23 20:37:53 +0100 (Sun, 23 Mar 2008) | 4 lines Adopt Nick's suggestion for useful default arguments. Clean-up floating point issues by adding true division and float constants. ................ r61813 | gregory.p.smith | 2008-03-23 22:04:43 +0100 (Sun, 23 Mar 2008) | 6 lines Fix gzip to deal with CRC's being signed values in Python 2.x properly and to read 32bit values as unsigned to start with rather than applying signedness fixups allover the place afterwards. This hopefully fixes the test_tarfile failure on the alpha/tru64 buildbot. ................
2008-03-23 18:54:12 -03:00
>>> for i in t: # doctest: +SKIP
... print(i)
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
2002 # year
3 # month
11 # day
0
0
0
0 # weekday (0 = Monday)
70 # 70th day in the year
-1
>>> ic = d.isocalendar()
Merged revisions 61724-61725,61731-61735,61737,61739,61741,61743-61744,61753,61761,61765-61767,61769,61773,61776-61778,61780-61783,61788,61793,61796,61807,61813 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r61724 | martin.v.loewis | 2008-03-22 01:01:12 +0100 (Sat, 22 Mar 2008) | 49 lines Merged revisions 61602-61723 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 M?\195?\164r 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 M?\195?\164r 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 M?\195?\164r 2008) | 2 lines Fix whitespace. ........ ................ r61725 | martin.v.loewis | 2008-03-22 01:02:41 +0100 (Sat, 22 Mar 2008) | 2 lines Install lib2to3. ................ r61731 | facundo.batista | 2008-03-22 03:45:37 +0100 (Sat, 22 Mar 2008) | 4 lines Small fix that complicated the test actually when that test failed. ................ r61732 | alexandre.vassalotti | 2008-03-22 05:08:44 +0100 (Sat, 22 Mar 2008) | 2 lines Added warning for the removal of 'hotshot' in Py3k. ................ r61733 | georg.brandl | 2008-03-22 11:07:29 +0100 (Sat, 22 Mar 2008) | 4 lines #1918: document that weak references *to* an object are cleared before the object's __del__ is called, to ensure that the weak reference callback (if any) finds the object healthy. ................ r61734 | georg.brandl | 2008-03-22 11:56:23 +0100 (Sat, 22 Mar 2008) | 2 lines Activate the Sphinx doctest extension and convert howto/functional to use it. ................ r61735 | georg.brandl | 2008-03-22 11:58:38 +0100 (Sat, 22 Mar 2008) | 2 lines Allow giving source names on the cmdline. ................ r61737 | georg.brandl | 2008-03-22 12:00:48 +0100 (Sat, 22 Mar 2008) | 2 lines Fixup this HOWTO's doctest blocks so that they can be run with sphinx' doctest builder. ................ r61739 | georg.brandl | 2008-03-22 12:47:10 +0100 (Sat, 22 Mar 2008) | 2 lines Test decimal.rst doctests as far as possible with sphinx doctest. ................ r61741 | georg.brandl | 2008-03-22 13:04:26 +0100 (Sat, 22 Mar 2008) | 2 lines Make doctests in re docs usable with sphinx' doctest. ................ r61743 | georg.brandl | 2008-03-22 13:59:37 +0100 (Sat, 22 Mar 2008) | 2 lines Make more doctests in pprint docs testable. ................ r61744 | georg.brandl | 2008-03-22 14:07:06 +0100 (Sat, 22 Mar 2008) | 2 lines No need to specify explicit "doctest_block" anymore. ................ r61753 | georg.brandl | 2008-03-22 21:08:43 +0100 (Sat, 22 Mar 2008) | 2 lines Fix-up syntax problems. ................ r61761 | georg.brandl | 2008-03-22 22:06:20 +0100 (Sat, 22 Mar 2008) | 4 lines Make collections' doctests executable. (The <BLANKLINE>s will be stripped from presentation output.) ................ r61765 | georg.brandl | 2008-03-22 22:21:57 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in datetime docs. ................ r61766 | georg.brandl | 2008-03-22 22:26:44 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in operator docs. ................ r61767 | georg.brandl | 2008-03-22 22:38:33 +0100 (Sat, 22 Mar 2008) | 2 lines Enable doctests in functions.rst. Already found two errors :) ................ r61769 | georg.brandl | 2008-03-22 23:04:10 +0100 (Sat, 22 Mar 2008) | 3 lines Enable doctest running for several other documents. We have now over 640 doctests that are run with "make doctest". ................ r61773 | raymond.hettinger | 2008-03-23 01:55:46 +0100 (Sun, 23 Mar 2008) | 1 line Simplify demo code. ................ r61776 | neal.norwitz | 2008-03-23 04:43:33 +0100 (Sun, 23 Mar 2008) | 7 lines Try to make this test a little more robust and not fail with: timeout (10.0025) is more than 2 seconds more than expected (0.001) I'm assuming this problem is caused by DNS lookup. This change does a DNS lookup of the hostname before trying to connect, so the time is not included. ................ r61777 | neal.norwitz | 2008-03-23 05:08:30 +0100 (Sun, 23 Mar 2008) | 1 line Speed up the test by avoiding socket timeouts. ................ r61778 | neal.norwitz | 2008-03-23 05:43:09 +0100 (Sun, 23 Mar 2008) | 1 line Skip the epoll test if epoll() does not work ................ r61780 | neal.norwitz | 2008-03-23 06:47:20 +0100 (Sun, 23 Mar 2008) | 1 line Suppress failure (to avoid a flaky test) if we cannot connect to svn.python.org ................ r61781 | neal.norwitz | 2008-03-23 07:13:25 +0100 (Sun, 23 Mar 2008) | 4 lines Move itertools before future_builtins since the latter depends on the former. From a clean build importing future_builtins would fail since itertools wasn't built yet. ................ r61782 | neal.norwitz | 2008-03-23 07:16:04 +0100 (Sun, 23 Mar 2008) | 1 line Try to prevent the alarm going off early in tearDown ................ r61783 | neal.norwitz | 2008-03-23 07:19:57 +0100 (Sun, 23 Mar 2008) | 4 lines Remove compiler warnings (on Alpha at least) about using chars as array subscripts. Using chars are dangerous b/c they are signed on some platforms and unsigned on others. ................ r61788 | georg.brandl | 2008-03-23 09:05:30 +0100 (Sun, 23 Mar 2008) | 2 lines Make the doctests presentation-friendlier. ................ r61793 | amaury.forgeotdarc | 2008-03-23 10:55:29 +0100 (Sun, 23 Mar 2008) | 4 lines #1477: ur'\U0010FFFF' raised in narrow unicode builds. Corrected the raw-unicode-escape codec to use UTF-16 surrogates in this case, just like the unicode-escape codec. ................ r61796 | raymond.hettinger | 2008-03-23 14:32:32 +0100 (Sun, 23 Mar 2008) | 1 line Issue 1681432: Add triangular distribution the random module. ................ r61807 | raymond.hettinger | 2008-03-23 20:37:53 +0100 (Sun, 23 Mar 2008) | 4 lines Adopt Nick's suggestion for useful default arguments. Clean-up floating point issues by adding true division and float constants. ................ r61813 | gregory.p.smith | 2008-03-23 22:04:43 +0100 (Sun, 23 Mar 2008) | 6 lines Fix gzip to deal with CRC's being signed values in Python 2.x properly and to read 32bit values as unsigned to start with rather than applying signedness fixups allover the place afterwards. This hopefully fixes the test_tarfile failure on the alpha/tru64 buildbot. ................
2008-03-23 18:54:12 -03:00
>>> for i in ic: # doctest: +SKIP
... print(i)
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
2002 # ISO year
11 # ISO week number
1 # ISO day number ( 1 = Monday )
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> # A date object is immutable; all operations produce a new object
>>> d.replace(year=2005)
datetime.date(2005, 3, 11)
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
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.. _datetime-datetime:
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:class:`.datetime` Objects
--------------------------
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A :class:`.datetime` object is a single object containing all the information
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
from a :class:`date` object and a :class:`.time` object.
Like a :class:`date` object, :class:`.datetime` assumes the current Gregorian
calendar extended in both directions; like a :class:`.time` object,
:class:`.datetime` assumes there are exactly 3600\*24 seconds in every day.
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Constructor:
.. class:: datetime(year, month, day, hour=0, minute=0, second=0, microsecond=0, tzinfo=None, *, fold=0)
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The *year*, *month* and *day* arguments are required. *tzinfo* may be ``None``, or an
instance of a :class:`tzinfo` subclass. The remaining arguments must be integers
in the following ranges:
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* ``MINYEAR <= year <= MAXYEAR``,
* ``1 <= month <= 12``,
* ``1 <= day <= number of days in the given month and year``,
* ``0 <= hour < 24``,
* ``0 <= minute < 60``,
* ``0 <= second < 60``,
* ``0 <= microsecond < 1000000``,
* ``fold in [0, 1]``.
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If an argument outside those ranges is given, :exc:`ValueError` is raised.
.. versionadded:: 3.6
Added the ``fold`` argument.
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Other constructors, all class methods:
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. classmethod:: datetime.today()
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return the current local datetime, with :attr:`.tzinfo` ``None``.
Equivalent to::
datetime.fromtimestamp(time.time())
See also :meth:`now`, :meth:`fromtimestamp`.
2007-08-15 11:28:22 -03:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
This method is functionally equivalent to :meth:`now`, but without a
``tz`` parameter.
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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. classmethod:: datetime.now(tz=None)
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return the current local date and time.
If optional argument *tz* is ``None``
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or not specified, this is like :meth:`today`, but, if possible, supplies more
precision than can be gotten from going through a :func:`time.time` timestamp
(for example, this may be possible on platforms supplying the C
:c:func:`gettimeofday` function).
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If *tz* is not ``None``, it must be an instance of a :class:`tzinfo` subclass,
and the current date and time are converted to *tz*s time zone.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
This function is preferred over :meth:`today` and :meth:`utcnow`.
2007-08-15 11:28:22 -03:00
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
.. classmethod:: datetime.utcnow()
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return the current UTC date and time, with :attr:`.tzinfo` ``None``.
This is like :meth:`now`, but returns the current UTC date and time, as a naive
:class:`.datetime` object. An aware current UTC datetime can be obtained by
calling ``datetime.now(timezone.utc)``. See also :meth:`now`.
2007-08-15 11:28:22 -03:00
.. warning::
Because naive ``datetime`` objects are treated by many ``datetime`` methods
as local times, it is preferred to use aware datetimes to represent times
in UTC. As such, the recommended way to create an object representing the
2019-12-01 01:44:21 -04:00
current time in UTC is by calling ``datetime.now(timezone.utc)``.
.. deprecated:: 3.12
Use :meth:`datetime.now` with :attr:`UTC` instead.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
.. classmethod:: datetime.fromtimestamp(timestamp, tz=None)
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Return the local date and time corresponding to the POSIX timestamp, such as is
returned by :func:`time.time`. If optional argument *tz* is ``None`` or not
specified, the timestamp is converted to the platform's local date and time, and
the returned :class:`.datetime` object is naive.
2007-08-15 11:28:22 -03:00
If *tz* is not ``None``, it must be an instance of a :class:`tzinfo` subclass, and the
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
timestamp is converted to *tz*s time zone.
:meth:`fromtimestamp` may raise :exc:`OverflowError`, if the timestamp is out of
the range of values supported by the platform C :c:func:`localtime` or
:c:func:`gmtime` functions, and :exc:`OSError` on :c:func:`localtime` or
:c:func:`gmtime` failure.
It's common for this to be restricted to years in
2007-08-15 11:28:22 -03:00
1970 through 2038. Note that on non-POSIX systems that include leap seconds in
their notion of a timestamp, leap seconds are ignored by :meth:`fromtimestamp`,
and then it's possible to have two timestamps differing by a second that yield
identical :class:`.datetime` objects. This method is preferred over
:meth:`utcfromtimestamp`.
2007-08-15 11:28:22 -03:00
.. versionchanged:: 3.3
Raise :exc:`OverflowError` instead of :exc:`ValueError` if the timestamp
is out of the range of values supported by the platform C
:c:func:`localtime` or :c:func:`gmtime` functions. Raise :exc:`OSError`
instead of :exc:`ValueError` on :c:func:`localtime` or :c:func:`gmtime`
failure.
.. versionchanged:: 3.6
:meth:`fromtimestamp` may return instances with :attr:`.fold` set to 1.
2007-08-15 11:28:22 -03:00
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
.. classmethod:: datetime.utcfromtimestamp(timestamp)
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Return the UTC :class:`.datetime` corresponding to the POSIX timestamp, with
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:attr:`.tzinfo` ``None``. (The resulting object is naive.)
This may raise :exc:`OverflowError`, if the timestamp is
out of the range of values supported by the platform C :c:func:`gmtime` function,
and :exc:`OSError` on :c:func:`gmtime` failure.
It's common for this to be restricted to years in 1970 through 2038.
To get an aware :class:`.datetime` object, call :meth:`fromtimestamp`::
datetime.fromtimestamp(timestamp, timezone.utc)
On the POSIX compliant platforms, it is equivalent to the following
expression::
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datetime(1970, 1, 1, tzinfo=timezone.utc) + timedelta(seconds=timestamp)
except the latter formula always supports the full years range: between
:const:`MINYEAR` and :const:`MAXYEAR` inclusive.
.. warning::
Because naive ``datetime`` objects are treated by many ``datetime`` methods
as local times, it is preferred to use aware datetimes to represent times
in UTC. As such, the recommended way to create an object representing a
2019-12-01 01:44:21 -04:00
specific timestamp in UTC is by calling
``datetime.fromtimestamp(timestamp, tz=timezone.utc)``.
.. versionchanged:: 3.3
Raise :exc:`OverflowError` instead of :exc:`ValueError` if the timestamp
is out of the range of values supported by the platform C
:c:func:`gmtime` function. Raise :exc:`OSError` instead of
:exc:`ValueError` on :c:func:`gmtime` failure.
.. deprecated:: 3.12
Use :meth:`datetime.fromtimestamp` with :attr:`UTC` instead.
2007-08-15 11:28:22 -03:00
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. classmethod:: datetime.fromordinal(ordinal)
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Return the :class:`.datetime` corresponding to the proleptic Gregorian ordinal,
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where January 1 of year 1 has ordinal 1. :exc:`ValueError` is raised unless ``1
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
<= ordinal <= datetime.max.toordinal()``. The hour, minute, second and
microsecond of the result are all 0, and :attr:`.tzinfo` is ``None``.
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.. classmethod:: datetime.combine(date, time, tzinfo=time.tzinfo)
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Return a new :class:`.datetime` object whose date components are equal to the
given :class:`date` object's, and whose time components
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
are equal to the given :class:`.time` object's. If the *tzinfo*
argument is provided, its value is used to set the :attr:`.tzinfo` attribute
of the result, otherwise the :attr:`~.time.tzinfo` attribute of the *time* argument
is used. If the *date* argument is a :class:`.datetime` object, its time components
and :attr:`.tzinfo` attributes are ignored.
For any :class:`.datetime` object *d*,
``d == datetime.combine(d.date(), d.time(), d.tzinfo)``.
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.. versionchanged:: 3.6
Added the *tzinfo* argument.
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.. classmethod:: datetime.fromisoformat(date_string)
Return a :class:`.datetime` corresponding to a *date_string* in any valid
ISO 8601 format, with the following exceptions:
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
1. Time zone offsets may have fractional seconds.
2. The ``T`` separator may be replaced by any single unicode character.
3. Ordinal dates are not currently supported.
4. Fractional hours and minutes are not supported.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Examples::
>>> from datetime import datetime
>>> datetime.fromisoformat('2011-11-04')
datetime.datetime(2011, 11, 4, 0, 0)
>>> datetime.fromisoformat('20111104')
datetime.datetime(2011, 11, 4, 0, 0)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> datetime.fromisoformat('2011-11-04T00:05:23')
datetime.datetime(2011, 11, 4, 0, 5, 23)
>>> datetime.fromisoformat('2011-11-04T00:05:23Z')
datetime.datetime(2011, 11, 4, 0, 5, 23, tzinfo=datetime.timezone.utc)
>>> datetime.fromisoformat('20111104T000523')
datetime.datetime(2011, 11, 4, 0, 5, 23)
>>> datetime.fromisoformat('2011-W01-2T00:05:23.283')
datetime.datetime(2011, 1, 4, 0, 5, 23, 283000)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> datetime.fromisoformat('2011-11-04 00:05:23.283')
datetime.datetime(2011, 11, 4, 0, 5, 23, 283000)
>>> datetime.fromisoformat('2011-11-04 00:05:23.283+00:00')
datetime.datetime(2011, 11, 4, 0, 5, 23, 283000, tzinfo=datetime.timezone.utc)
>>> datetime.fromisoformat('2011-11-04T00:05:23+04:00') # doctest: +NORMALIZE_WHITESPACE
datetime.datetime(2011, 11, 4, 0, 5, 23,
tzinfo=datetime.timezone(datetime.timedelta(seconds=14400)))
.. versionadded:: 3.7
.. versionchanged:: 3.11
Previously, this method only supported formats that could be emitted by
:meth:`date.isoformat()` or :meth:`datetime.isoformat()`.
.. classmethod:: datetime.fromisocalendar(year, week, day)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return a :class:`.datetime` corresponding to the ISO calendar date specified
by year, week and day. The non-date components of the datetime are populated
with their normal default values. This is the inverse of the function
:meth:`datetime.isocalendar`.
.. versionadded:: 3.8
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. classmethod:: datetime.strptime(date_string, format)
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Return a :class:`.datetime` corresponding to *date_string*, parsed according to
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
*format*.
If *format* does not contain microseconds or timezone information, this is equivalent to::
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
datetime(*(time.strptime(date_string, format)[0:6]))
:exc:`ValueError` is raised if the date_string and format
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can't be parsed by :func:`time.strptime` or if it returns a value which isn't a
time tuple. See also :ref:`strftime-strptime-behavior` and
:meth:`datetime.fromisoformat`.
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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Class attributes:
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.. attribute:: datetime.min
The earliest representable :class:`.datetime`, ``datetime(MINYEAR, 1, 1,
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tzinfo=None)``.
.. attribute:: datetime.max
The latest representable :class:`.datetime`, ``datetime(MAXYEAR, 12, 31, 23, 59,
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59, 999999, tzinfo=None)``.
.. attribute:: datetime.resolution
The smallest possible difference between non-equal :class:`.datetime` objects,
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``timedelta(microseconds=1)``.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Instance attributes (read-only):
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.. attribute:: datetime.year
Between :const:`MINYEAR` and :const:`MAXYEAR` inclusive.
.. attribute:: datetime.month
Between 1 and 12 inclusive.
.. attribute:: datetime.day
Between 1 and the number of days in the given month of the given year.
.. attribute:: datetime.hour
In ``range(24)``.
.. attribute:: datetime.minute
In ``range(60)``.
.. attribute:: datetime.second
In ``range(60)``.
.. attribute:: datetime.microsecond
In ``range(1000000)``.
.. attribute:: datetime.tzinfo
The object passed as the *tzinfo* argument to the :class:`.datetime` constructor,
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or ``None`` if none was passed.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
.. attribute:: datetime.fold
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
In ``[0, 1]``. Used to disambiguate wall times during a repeated interval. (A
repeated interval occurs when clocks are rolled back at the end of daylight saving
time or when the UTC offset for the current zone is decreased for political reasons.)
The value 0 (1) represents the earlier (later) of the two moments with the same wall
time representation.
.. versionadded:: 3.6
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Supported operations:
+---------------------------------------+--------------------------------+
| Operation | Result |
+=======================================+================================+
| ``datetime2 = datetime1 + timedelta`` | \(1) |
+---------------------------------------+--------------------------------+
| ``datetime2 = datetime1 - timedelta`` | \(2) |
+---------------------------------------+--------------------------------+
| ``timedelta = datetime1 - datetime2`` | \(3) |
+---------------------------------------+--------------------------------+
| ``datetime1 < datetime2`` | Compares :class:`.datetime` to |
| | :class:`.datetime`. (4) |
+---------------------------------------+--------------------------------+
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(1)
datetime2 is a duration of timedelta removed from datetime1, moving forward in
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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time if ``timedelta.days`` > 0, or backward if ``timedelta.days`` < 0. The
result has the same :attr:`~.datetime.tzinfo` attribute as the input datetime, and
datetime2 - datetime1 == timedelta after. :exc:`OverflowError` is raised if
datetime2.year would be smaller than :const:`MINYEAR` or larger than
:const:`MAXYEAR`. Note that no time zone adjustments are done even if the
input is an aware object.
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(2)
Computes the datetime2 such that datetime2 + timedelta == datetime1. As for
addition, the result has the same :attr:`~.datetime.tzinfo` attribute as the input
datetime, and no time zone adjustments are done even if the input is aware.
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(3)
Subtraction of a :class:`.datetime` from a :class:`.datetime` is defined only if
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
both operands are naive, or if both are aware. If one is aware and the other is
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naive, :exc:`TypeError` is raised.
If both are naive, or both are aware and have the same :attr:`~.datetime.tzinfo` attribute,
the :attr:`~.datetime.tzinfo` attributes are ignored, and the result is a :class:`timedelta`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
object *t* such that ``datetime2 + t == datetime1``. No time zone adjustments
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are done in this case.
If both are aware and have different :attr:`~.datetime.tzinfo` attributes, ``a-b`` acts
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
as if *a* and *b* were first converted to naive UTC datetimes first. The
result is ``(a.replace(tzinfo=None) - a.utcoffset()) - (b.replace(tzinfo=None)
- b.utcoffset())`` except that the implementation never overflows.
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(4)
*datetime1* is considered less than *datetime2* when *datetime1* precedes
*datetime2* in time.
If one comparand is naive and the other is aware, :exc:`TypeError`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
is raised if an order comparison is attempted. For equality
comparisons, naive instances are never equal to aware instances.
If both comparands are aware, and have the same :attr:`~.datetime.tzinfo` attribute, the
common :attr:`~.datetime.tzinfo` attribute is ignored and the base datetimes are
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
compared. If both comparands are aware and have different :attr:`~.datetime.tzinfo`
attributes, the comparands are first adjusted by subtracting their UTC
offsets (obtained from ``self.utcoffset()``).
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.. versionchanged:: 3.3
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Equality comparisons between aware and naive :class:`.datetime`
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instances don't raise :exc:`TypeError`.
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.. note::
In order to stop comparison from falling back to the default scheme of comparing
object addresses, datetime comparison normally raises :exc:`TypeError` if the
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
other comparand isn't also a :class:`.datetime` object. However,
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``NotImplemented`` is returned instead if the other comparand has a
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:meth:`timetuple` attribute. This hook gives other kinds of date objects a
chance at implementing mixed-type comparison. If not, when a :class:`.datetime`
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object is compared to an object of a different type, :exc:`TypeError` is raised
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
unless the comparison is ``==`` or ``!=``. The latter cases return
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:const:`False` or :const:`True`, respectively.
Instance methods:
.. method:: datetime.date()
Return :class:`date` object with same year, month and day.
.. method:: datetime.time()
Return :class:`.time` object with same hour, minute, second, microsecond and fold.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:attr:`.tzinfo` is ``None``. See also method :meth:`timetz`.
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.. versionchanged:: 3.6
The fold value is copied to the returned :class:`.time` object.
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.. method:: datetime.timetz()
Return :class:`.time` object with same hour, minute, second, microsecond, fold, and
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
tzinfo attributes. See also method :meth:`time`.
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.. versionchanged:: 3.6
The fold value is copied to the returned :class:`.time` object.
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.. method:: datetime.replace(year=self.year, month=self.month, day=self.day, \
hour=self.hour, minute=self.minute, second=self.second, microsecond=self.microsecond, \
tzinfo=self.tzinfo, *, fold=0)
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Return a datetime with the same attributes, except for those attributes given
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
new values by whichever keyword arguments are specified. Note that
``tzinfo=None`` can be specified to create a naive datetime from an aware
datetime with no conversion of date and time data.
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.. versionadded:: 3.6
Added the ``fold`` argument.
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.. method:: datetime.astimezone(tz=None)
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Return a :class:`.datetime` object with new :attr:`.tzinfo` attribute *tz*,
adjusting the date and time data so the result is the same UTC time as
*self*, but in *tz*'s local time.
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If provided, *tz* must be an instance of a :class:`tzinfo` subclass, and its
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:meth:`utcoffset` and :meth:`dst` methods must not return ``None``. If *self*
is naive, it is presumed to represent time in the system timezone.
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If called without arguments (or with ``tz=None``) the system local
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
timezone is assumed for the target timezone. The ``.tzinfo`` attribute of the converted
datetime instance will be set to an instance of :class:`timezone`
with the zone name and offset obtained from the OS.
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If ``self.tzinfo`` is *tz*, ``self.astimezone(tz)`` is equal to *self*: no
adjustment of date or time data is performed. Else the result is local
time in the timezone *tz*, representing the same UTC time as *self*: after
``astz = dt.astimezone(tz)``, ``astz - astz.utcoffset()`` will have
the same date and time data as ``dt - dt.utcoffset()``.
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If you merely want to attach a time zone object *tz* to a datetime *dt* without
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
adjustment of date and time data, use ``dt.replace(tzinfo=tz)``. If you
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merely want to remove the time zone object from an aware datetime *dt* without
conversion of date and time data, use ``dt.replace(tzinfo=None)``.
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Note that the default :meth:`tzinfo.fromutc` method can be overridden in a
:class:`tzinfo` subclass to affect the result returned by :meth:`astimezone`.
Ignoring error cases, :meth:`astimezone` acts like::
def astimezone(self, tz):
if self.tzinfo is tz:
return self
# Convert self to UTC, and attach the new time zone object.
utc = (self - self.utcoffset()).replace(tzinfo=tz)
# Convert from UTC to tz's local time.
return tz.fromutc(utc)
.. versionchanged:: 3.3
*tz* now can be omitted.
.. versionchanged:: 3.6
The :meth:`astimezone` method can now be called on naive instances that
are presumed to represent system local time.
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.. method:: datetime.utcoffset()
If :attr:`.tzinfo` is ``None``, returns ``None``, else returns
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``self.tzinfo.utcoffset(self)``, and raises an exception if the latter doesn't
return ``None`` or a :class:`timedelta` object with magnitude less than one day.
.. versionchanged:: 3.7
The UTC offset is not restricted to a whole number of minutes.
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.. method:: datetime.dst()
If :attr:`.tzinfo` is ``None``, returns ``None``, else returns
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``self.tzinfo.dst(self)``, and raises an exception if the latter doesn't return
``None`` or a :class:`timedelta` object with magnitude less than one day.
.. versionchanged:: 3.7
The DST offset is not restricted to a whole number of minutes.
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.. method:: datetime.tzname()
If :attr:`.tzinfo` is ``None``, returns ``None``, else returns
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``self.tzinfo.tzname(self)``, raises an exception if the latter doesn't return
``None`` or a string object,
.. method:: datetime.timetuple()
Return a :class:`time.struct_time` such as returned by :func:`time.localtime`.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
``d.timetuple()`` is equivalent to::
time.struct_time((d.year, d.month, d.day,
d.hour, d.minute, d.second,
d.weekday(), yday, dst))
where ``yday = d.toordinal() - date(d.year, 1, 1).toordinal() + 1``
is the day number within the current year starting with ``1`` for January
1st. The :attr:`tm_isdst` flag of the result is set according to the
:meth:`dst` method: :attr:`.tzinfo` is ``None`` or :meth:`dst` returns
``None``, :attr:`tm_isdst` is set to ``-1``; else if :meth:`dst` returns a
non-zero value, :attr:`tm_isdst` is set to ``1``; else :attr:`tm_isdst` is
set to ``0``.
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.. method:: datetime.utctimetuple()
If :class:`.datetime` instance *d* is naive, this is the same as
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``d.timetuple()`` except that :attr:`tm_isdst` is forced to 0 regardless of what
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
``d.dst()`` returns. DST is never in effect for a UTC time.
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If *d* is aware, *d* is normalized to UTC time, by subtracting
``d.utcoffset()``, and a :class:`time.struct_time` for the
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
normalized time is returned. :attr:`tm_isdst` is forced to 0. Note
that an :exc:`OverflowError` may be raised if *d*.year was
``MINYEAR`` or ``MAXYEAR`` and UTC adjustment spills over a year
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boundary.
.. warning::
Because naive ``datetime`` objects are treated by many ``datetime`` methods
as local times, it is preferred to use aware datetimes to represent times
in UTC; as a result, using :meth:`datetime.utctimetuple` may give misleading
results. If you have a naive ``datetime`` representing UTC, use
``datetime.replace(tzinfo=timezone.utc)`` to make it aware, at which point
you can use :meth:`.datetime.timetuple`.
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.. method:: datetime.toordinal()
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return the proleptic Gregorian ordinal of the date. The same as
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``self.date().toordinal()``.
.. method:: datetime.timestamp()
Return POSIX timestamp corresponding to the :class:`.datetime`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
instance. The return value is a :class:`float` similar to that
returned by :func:`time.time`.
Naive :class:`.datetime` instances are assumed to represent local
time and this method relies on the platform C :c:func:`mktime`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
function to perform the conversion. Since :class:`.datetime`
supports wider range of values than :c:func:`mktime` on many
platforms, this method may raise :exc:`OverflowError` or :exc:`OSError`
for times far in the past or far in the future.
For aware :class:`.datetime` instances, the return value is computed
as::
(dt - datetime(1970, 1, 1, tzinfo=timezone.utc)).total_seconds()
.. versionadded:: 3.3
.. versionchanged:: 3.6
The :meth:`timestamp` method uses the :attr:`.fold` attribute to
disambiguate the times during a repeated interval.
.. note::
There is no method to obtain the POSIX timestamp directly from a
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
naive :class:`.datetime` instance representing UTC time. If your
application uses this convention and your system timezone is not
set to UTC, you can obtain the POSIX timestamp by supplying
``tzinfo=timezone.utc``::
timestamp = dt.replace(tzinfo=timezone.utc).timestamp()
or by calculating the timestamp directly::
timestamp = (dt - datetime(1970, 1, 1)) / timedelta(seconds=1)
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.. method:: datetime.weekday()
Return the day of the week as an integer, where Monday is 0 and Sunday is 6.
The same as ``self.date().weekday()``. See also :meth:`isoweekday`.
.. method:: datetime.isoweekday()
Return the day of the week as an integer, where Monday is 1 and Sunday is 7.
The same as ``self.date().isoweekday()``. See also :meth:`weekday`,
:meth:`isocalendar`.
.. method:: datetime.isocalendar()
Return a :term:`named tuple` with three components: ``year``, ``week``
and ``weekday``. The same as ``self.date().isocalendar()``.
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.. method:: datetime.isoformat(sep='T', timespec='auto')
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return a string representing the date and time in ISO 8601 format:
- ``YYYY-MM-DDTHH:MM:SS.ffffff``, if :attr:`microsecond` is not 0
- ``YYYY-MM-DDTHH:MM:SS``, if :attr:`microsecond` is 0
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If :meth:`utcoffset` does not return ``None``, a string is
appended, giving the UTC offset:
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
- ``YYYY-MM-DDTHH:MM:SS.ffffff+HH:MM[:SS[.ffffff]]``, if :attr:`microsecond`
is not 0
- ``YYYY-MM-DDTHH:MM:SS+HH:MM[:SS[.ffffff]]``, if :attr:`microsecond` is 0
Examples::
>>> from datetime import datetime, timezone
>>> datetime(2019, 5, 18, 15, 17, 8, 132263).isoformat()
'2019-05-18T15:17:08.132263'
>>> datetime(2019, 5, 18, 15, 17, tzinfo=timezone.utc).isoformat()
'2019-05-18T15:17:00+00:00'
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The optional argument *sep* (default ``'T'``) is a one-character separator,
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
placed between the date and time portions of the result. For example::
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>>> from datetime import tzinfo, timedelta, datetime
>>> class TZ(tzinfo):
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
... """A time zone with an arbitrary, constant -06:39 offset."""
... def utcoffset(self, dt):
... return timedelta(hours=-6, minutes=-39)
2007-08-15 11:28:22 -03:00
...
>>> datetime(2002, 12, 25, tzinfo=TZ()).isoformat(' ')
'2002-12-25 00:00:00-06:39'
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> datetime(2009, 11, 27, microsecond=100, tzinfo=TZ()).isoformat()
'2009-11-27T00:00:00.000100-06:39'
2007-08-15 11:28:22 -03:00
The optional argument *timespec* specifies the number of additional
components of the time to include (the default is ``'auto'``).
It can be one of the following:
- ``'auto'``: Same as ``'seconds'`` if :attr:`microsecond` is 0,
same as ``'microseconds'`` otherwise.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
- ``'hours'``: Include the :attr:`hour` in the two-digit ``HH`` format.
- ``'minutes'``: Include :attr:`hour` and :attr:`minute` in ``HH:MM`` format.
- ``'seconds'``: Include :attr:`hour`, :attr:`minute`, and :attr:`second`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
in ``HH:MM:SS`` format.
- ``'milliseconds'``: Include full time, but truncate fractional second
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
part to milliseconds. ``HH:MM:SS.sss`` format.
- ``'microseconds'``: Include full time in ``HH:MM:SS.ffffff`` format.
.. note::
Excluded time components are truncated, not rounded.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:exc:`ValueError` will be raised on an invalid *timespec* argument::
>>> from datetime import datetime
>>> datetime.now().isoformat(timespec='minutes') # doctest: +SKIP
'2002-12-25T00:00'
>>> dt = datetime(2015, 1, 1, 12, 30, 59, 0)
>>> dt.isoformat(timespec='microseconds')
'2015-01-01T12:30:59.000000'
.. versionadded:: 3.6
Added the *timespec* argument.
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.. method:: datetime.__str__()
For a :class:`.datetime` instance *d*, ``str(d)`` is equivalent to
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``d.isoformat(' ')``.
.. method:: datetime.ctime()
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return a string representing the date and time::
>>> from datetime import datetime
>>> datetime(2002, 12, 4, 20, 30, 40).ctime()
'Wed Dec 4 20:30:40 2002'
The output string will *not* include time zone information, regardless
of whether the input is aware or naive.
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
``d.ctime()`` is equivalent to::
time.ctime(time.mktime(d.timetuple()))
on platforms where the native C :c:func:`ctime` function
(which :func:`time.ctime` invokes, but which
:meth:`datetime.ctime` does not invoke) conforms to the C standard.
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2007-08-15 11:28:22 -03:00
.. method:: datetime.strftime(format)
Return a string representing the date and time,
controlled by an explicit format string.
See also :ref:`strftime-strptime-behavior` and :meth:`datetime.isoformat`.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
2007-08-15 11:28:22 -03:00
.. method:: datetime.__format__(format)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Same as :meth:`.datetime.strftime`. This makes it possible to specify a format
string for a :class:`.datetime` object in :ref:`formatted string
literals <f-strings>` and when using :meth:`str.format`.
See also :ref:`strftime-strptime-behavior` and :meth:`datetime.isoformat`.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Examples of Usage: :class:`.datetime`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Examples of working with :class:`~datetime.datetime` objects:
Merged revisions 61724-61725,61731-61735,61737,61739,61741,61743-61744,61753,61761,61765-61767,61769,61773,61776-61778,61780-61783,61788,61793,61796,61807,61813 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r61724 | martin.v.loewis | 2008-03-22 01:01:12 +0100 (Sat, 22 Mar 2008) | 49 lines Merged revisions 61602-61723 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 M?\195?\164r 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 M?\195?\164r 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 M?\195?\164r 2008) | 2 lines Fix whitespace. ........ ................ r61725 | martin.v.loewis | 2008-03-22 01:02:41 +0100 (Sat, 22 Mar 2008) | 2 lines Install lib2to3. ................ r61731 | facundo.batista | 2008-03-22 03:45:37 +0100 (Sat, 22 Mar 2008) | 4 lines Small fix that complicated the test actually when that test failed. ................ r61732 | alexandre.vassalotti | 2008-03-22 05:08:44 +0100 (Sat, 22 Mar 2008) | 2 lines Added warning for the removal of 'hotshot' in Py3k. ................ r61733 | georg.brandl | 2008-03-22 11:07:29 +0100 (Sat, 22 Mar 2008) | 4 lines #1918: document that weak references *to* an object are cleared before the object's __del__ is called, to ensure that the weak reference callback (if any) finds the object healthy. ................ r61734 | georg.brandl | 2008-03-22 11:56:23 +0100 (Sat, 22 Mar 2008) | 2 lines Activate the Sphinx doctest extension and convert howto/functional to use it. ................ r61735 | georg.brandl | 2008-03-22 11:58:38 +0100 (Sat, 22 Mar 2008) | 2 lines Allow giving source names on the cmdline. ................ r61737 | georg.brandl | 2008-03-22 12:00:48 +0100 (Sat, 22 Mar 2008) | 2 lines Fixup this HOWTO's doctest blocks so that they can be run with sphinx' doctest builder. ................ r61739 | georg.brandl | 2008-03-22 12:47:10 +0100 (Sat, 22 Mar 2008) | 2 lines Test decimal.rst doctests as far as possible with sphinx doctest. ................ r61741 | georg.brandl | 2008-03-22 13:04:26 +0100 (Sat, 22 Mar 2008) | 2 lines Make doctests in re docs usable with sphinx' doctest. ................ r61743 | georg.brandl | 2008-03-22 13:59:37 +0100 (Sat, 22 Mar 2008) | 2 lines Make more doctests in pprint docs testable. ................ r61744 | georg.brandl | 2008-03-22 14:07:06 +0100 (Sat, 22 Mar 2008) | 2 lines No need to specify explicit "doctest_block" anymore. ................ r61753 | georg.brandl | 2008-03-22 21:08:43 +0100 (Sat, 22 Mar 2008) | 2 lines Fix-up syntax problems. ................ r61761 | georg.brandl | 2008-03-22 22:06:20 +0100 (Sat, 22 Mar 2008) | 4 lines Make collections' doctests executable. (The <BLANKLINE>s will be stripped from presentation output.) ................ r61765 | georg.brandl | 2008-03-22 22:21:57 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in datetime docs. ................ r61766 | georg.brandl | 2008-03-22 22:26:44 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in operator docs. ................ r61767 | georg.brandl | 2008-03-22 22:38:33 +0100 (Sat, 22 Mar 2008) | 2 lines Enable doctests in functions.rst. Already found two errors :) ................ r61769 | georg.brandl | 2008-03-22 23:04:10 +0100 (Sat, 22 Mar 2008) | 3 lines Enable doctest running for several other documents. We have now over 640 doctests that are run with "make doctest". ................ r61773 | raymond.hettinger | 2008-03-23 01:55:46 +0100 (Sun, 23 Mar 2008) | 1 line Simplify demo code. ................ r61776 | neal.norwitz | 2008-03-23 04:43:33 +0100 (Sun, 23 Mar 2008) | 7 lines Try to make this test a little more robust and not fail with: timeout (10.0025) is more than 2 seconds more than expected (0.001) I'm assuming this problem is caused by DNS lookup. This change does a DNS lookup of the hostname before trying to connect, so the time is not included. ................ r61777 | neal.norwitz | 2008-03-23 05:08:30 +0100 (Sun, 23 Mar 2008) | 1 line Speed up the test by avoiding socket timeouts. ................ r61778 | neal.norwitz | 2008-03-23 05:43:09 +0100 (Sun, 23 Mar 2008) | 1 line Skip the epoll test if epoll() does not work ................ r61780 | neal.norwitz | 2008-03-23 06:47:20 +0100 (Sun, 23 Mar 2008) | 1 line Suppress failure (to avoid a flaky test) if we cannot connect to svn.python.org ................ r61781 | neal.norwitz | 2008-03-23 07:13:25 +0100 (Sun, 23 Mar 2008) | 4 lines Move itertools before future_builtins since the latter depends on the former. From a clean build importing future_builtins would fail since itertools wasn't built yet. ................ r61782 | neal.norwitz | 2008-03-23 07:16:04 +0100 (Sun, 23 Mar 2008) | 1 line Try to prevent the alarm going off early in tearDown ................ r61783 | neal.norwitz | 2008-03-23 07:19:57 +0100 (Sun, 23 Mar 2008) | 4 lines Remove compiler warnings (on Alpha at least) about using chars as array subscripts. Using chars are dangerous b/c they are signed on some platforms and unsigned on others. ................ r61788 | georg.brandl | 2008-03-23 09:05:30 +0100 (Sun, 23 Mar 2008) | 2 lines Make the doctests presentation-friendlier. ................ r61793 | amaury.forgeotdarc | 2008-03-23 10:55:29 +0100 (Sun, 23 Mar 2008) | 4 lines #1477: ur'\U0010FFFF' raised in narrow unicode builds. Corrected the raw-unicode-escape codec to use UTF-16 surrogates in this case, just like the unicode-escape codec. ................ r61796 | raymond.hettinger | 2008-03-23 14:32:32 +0100 (Sun, 23 Mar 2008) | 1 line Issue 1681432: Add triangular distribution the random module. ................ r61807 | raymond.hettinger | 2008-03-23 20:37:53 +0100 (Sun, 23 Mar 2008) | 4 lines Adopt Nick's suggestion for useful default arguments. Clean-up floating point issues by adding true division and float constants. ................ r61813 | gregory.p.smith | 2008-03-23 22:04:43 +0100 (Sun, 23 Mar 2008) | 6 lines Fix gzip to deal with CRC's being signed values in Python 2.x properly and to read 32bit values as unsigned to start with rather than applying signedness fixups allover the place afterwards. This hopefully fixes the test_tarfile failure on the alpha/tru64 buildbot. ................
2008-03-23 18:54:12 -03:00
.. doctest::
>>> from datetime import datetime, date, time, timezone
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> # Using datetime.combine()
>>> d = date(2005, 7, 14)
>>> t = time(12, 30)
>>> datetime.combine(d, t)
datetime.datetime(2005, 7, 14, 12, 30)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> # Using datetime.now()
Merged revisions 61724-61725,61731-61735,61737,61739,61741,61743-61744,61753,61761,61765-61767,61769,61773,61776-61778,61780-61783,61788,61793,61796,61807,61813 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r61724 | martin.v.loewis | 2008-03-22 01:01:12 +0100 (Sat, 22 Mar 2008) | 49 lines Merged revisions 61602-61723 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 M?\195?\164r 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 M?\195?\164r 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 M?\195?\164r 2008) | 2 lines Fix whitespace. ........ ................ r61725 | martin.v.loewis | 2008-03-22 01:02:41 +0100 (Sat, 22 Mar 2008) | 2 lines Install lib2to3. ................ r61731 | facundo.batista | 2008-03-22 03:45:37 +0100 (Sat, 22 Mar 2008) | 4 lines Small fix that complicated the test actually when that test failed. ................ r61732 | alexandre.vassalotti | 2008-03-22 05:08:44 +0100 (Sat, 22 Mar 2008) | 2 lines Added warning for the removal of 'hotshot' in Py3k. ................ r61733 | georg.brandl | 2008-03-22 11:07:29 +0100 (Sat, 22 Mar 2008) | 4 lines #1918: document that weak references *to* an object are cleared before the object's __del__ is called, to ensure that the weak reference callback (if any) finds the object healthy. ................ r61734 | georg.brandl | 2008-03-22 11:56:23 +0100 (Sat, 22 Mar 2008) | 2 lines Activate the Sphinx doctest extension and convert howto/functional to use it. ................ r61735 | georg.brandl | 2008-03-22 11:58:38 +0100 (Sat, 22 Mar 2008) | 2 lines Allow giving source names on the cmdline. ................ r61737 | georg.brandl | 2008-03-22 12:00:48 +0100 (Sat, 22 Mar 2008) | 2 lines Fixup this HOWTO's doctest blocks so that they can be run with sphinx' doctest builder. ................ r61739 | georg.brandl | 2008-03-22 12:47:10 +0100 (Sat, 22 Mar 2008) | 2 lines Test decimal.rst doctests as far as possible with sphinx doctest. ................ r61741 | georg.brandl | 2008-03-22 13:04:26 +0100 (Sat, 22 Mar 2008) | 2 lines Make doctests in re docs usable with sphinx' doctest. ................ r61743 | georg.brandl | 2008-03-22 13:59:37 +0100 (Sat, 22 Mar 2008) | 2 lines Make more doctests in pprint docs testable. ................ r61744 | georg.brandl | 2008-03-22 14:07:06 +0100 (Sat, 22 Mar 2008) | 2 lines No need to specify explicit "doctest_block" anymore. ................ r61753 | georg.brandl | 2008-03-22 21:08:43 +0100 (Sat, 22 Mar 2008) | 2 lines Fix-up syntax problems. ................ r61761 | georg.brandl | 2008-03-22 22:06:20 +0100 (Sat, 22 Mar 2008) | 4 lines Make collections' doctests executable. (The <BLANKLINE>s will be stripped from presentation output.) ................ r61765 | georg.brandl | 2008-03-22 22:21:57 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in datetime docs. ................ r61766 | georg.brandl | 2008-03-22 22:26:44 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in operator docs. ................ r61767 | georg.brandl | 2008-03-22 22:38:33 +0100 (Sat, 22 Mar 2008) | 2 lines Enable doctests in functions.rst. Already found two errors :) ................ r61769 | georg.brandl | 2008-03-22 23:04:10 +0100 (Sat, 22 Mar 2008) | 3 lines Enable doctest running for several other documents. We have now over 640 doctests that are run with "make doctest". ................ r61773 | raymond.hettinger | 2008-03-23 01:55:46 +0100 (Sun, 23 Mar 2008) | 1 line Simplify demo code. ................ r61776 | neal.norwitz | 2008-03-23 04:43:33 +0100 (Sun, 23 Mar 2008) | 7 lines Try to make this test a little more robust and not fail with: timeout (10.0025) is more than 2 seconds more than expected (0.001) I'm assuming this problem is caused by DNS lookup. This change does a DNS lookup of the hostname before trying to connect, so the time is not included. ................ r61777 | neal.norwitz | 2008-03-23 05:08:30 +0100 (Sun, 23 Mar 2008) | 1 line Speed up the test by avoiding socket timeouts. ................ r61778 | neal.norwitz | 2008-03-23 05:43:09 +0100 (Sun, 23 Mar 2008) | 1 line Skip the epoll test if epoll() does not work ................ r61780 | neal.norwitz | 2008-03-23 06:47:20 +0100 (Sun, 23 Mar 2008) | 1 line Suppress failure (to avoid a flaky test) if we cannot connect to svn.python.org ................ r61781 | neal.norwitz | 2008-03-23 07:13:25 +0100 (Sun, 23 Mar 2008) | 4 lines Move itertools before future_builtins since the latter depends on the former. From a clean build importing future_builtins would fail since itertools wasn't built yet. ................ r61782 | neal.norwitz | 2008-03-23 07:16:04 +0100 (Sun, 23 Mar 2008) | 1 line Try to prevent the alarm going off early in tearDown ................ r61783 | neal.norwitz | 2008-03-23 07:19:57 +0100 (Sun, 23 Mar 2008) | 4 lines Remove compiler warnings (on Alpha at least) about using chars as array subscripts. Using chars are dangerous b/c they are signed on some platforms and unsigned on others. ................ r61788 | georg.brandl | 2008-03-23 09:05:30 +0100 (Sun, 23 Mar 2008) | 2 lines Make the doctests presentation-friendlier. ................ r61793 | amaury.forgeotdarc | 2008-03-23 10:55:29 +0100 (Sun, 23 Mar 2008) | 4 lines #1477: ur'\U0010FFFF' raised in narrow unicode builds. Corrected the raw-unicode-escape codec to use UTF-16 surrogates in this case, just like the unicode-escape codec. ................ r61796 | raymond.hettinger | 2008-03-23 14:32:32 +0100 (Sun, 23 Mar 2008) | 1 line Issue 1681432: Add triangular distribution the random module. ................ r61807 | raymond.hettinger | 2008-03-23 20:37:53 +0100 (Sun, 23 Mar 2008) | 4 lines Adopt Nick's suggestion for useful default arguments. Clean-up floating point issues by adding true division and float constants. ................ r61813 | gregory.p.smith | 2008-03-23 22:04:43 +0100 (Sun, 23 Mar 2008) | 6 lines Fix gzip to deal with CRC's being signed values in Python 2.x properly and to read 32bit values as unsigned to start with rather than applying signedness fixups allover the place afterwards. This hopefully fixes the test_tarfile failure on the alpha/tru64 buildbot. ................
2008-03-23 18:54:12 -03:00
>>> datetime.now() # doctest: +SKIP
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
datetime.datetime(2007, 12, 6, 16, 29, 43, 79043) # GMT +1
>>> datetime.now(timezone.utc) # doctest: +SKIP
datetime.datetime(2007, 12, 6, 15, 29, 43, 79060, tzinfo=datetime.timezone.utc)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> # Using datetime.strptime()
>>> dt = datetime.strptime("21/11/06 16:30", "%d/%m/%y %H:%M")
>>> dt
datetime.datetime(2006, 11, 21, 16, 30)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> # Using datetime.timetuple() to get tuple of all attributes
>>> tt = dt.timetuple()
Merged revisions 61724-61725,61731-61735,61737,61739,61741,61743-61744,61753,61761,61765-61767,61769,61773,61776-61778,61780-61783,61788,61793,61796,61807,61813 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r61724 | martin.v.loewis | 2008-03-22 01:01:12 +0100 (Sat, 22 Mar 2008) | 49 lines Merged revisions 61602-61723 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 M?\195?\164r 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 M?\195?\164r 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 M?\195?\164r 2008) | 2 lines Fix whitespace. ........ ................ r61725 | martin.v.loewis | 2008-03-22 01:02:41 +0100 (Sat, 22 Mar 2008) | 2 lines Install lib2to3. ................ r61731 | facundo.batista | 2008-03-22 03:45:37 +0100 (Sat, 22 Mar 2008) | 4 lines Small fix that complicated the test actually when that test failed. ................ r61732 | alexandre.vassalotti | 2008-03-22 05:08:44 +0100 (Sat, 22 Mar 2008) | 2 lines Added warning for the removal of 'hotshot' in Py3k. ................ r61733 | georg.brandl | 2008-03-22 11:07:29 +0100 (Sat, 22 Mar 2008) | 4 lines #1918: document that weak references *to* an object are cleared before the object's __del__ is called, to ensure that the weak reference callback (if any) finds the object healthy. ................ r61734 | georg.brandl | 2008-03-22 11:56:23 +0100 (Sat, 22 Mar 2008) | 2 lines Activate the Sphinx doctest extension and convert howto/functional to use it. ................ r61735 | georg.brandl | 2008-03-22 11:58:38 +0100 (Sat, 22 Mar 2008) | 2 lines Allow giving source names on the cmdline. ................ r61737 | georg.brandl | 2008-03-22 12:00:48 +0100 (Sat, 22 Mar 2008) | 2 lines Fixup this HOWTO's doctest blocks so that they can be run with sphinx' doctest builder. ................ r61739 | georg.brandl | 2008-03-22 12:47:10 +0100 (Sat, 22 Mar 2008) | 2 lines Test decimal.rst doctests as far as possible with sphinx doctest. ................ r61741 | georg.brandl | 2008-03-22 13:04:26 +0100 (Sat, 22 Mar 2008) | 2 lines Make doctests in re docs usable with sphinx' doctest. ................ r61743 | georg.brandl | 2008-03-22 13:59:37 +0100 (Sat, 22 Mar 2008) | 2 lines Make more doctests in pprint docs testable. ................ r61744 | georg.brandl | 2008-03-22 14:07:06 +0100 (Sat, 22 Mar 2008) | 2 lines No need to specify explicit "doctest_block" anymore. ................ r61753 | georg.brandl | 2008-03-22 21:08:43 +0100 (Sat, 22 Mar 2008) | 2 lines Fix-up syntax problems. ................ r61761 | georg.brandl | 2008-03-22 22:06:20 +0100 (Sat, 22 Mar 2008) | 4 lines Make collections' doctests executable. (The <BLANKLINE>s will be stripped from presentation output.) ................ r61765 | georg.brandl | 2008-03-22 22:21:57 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in datetime docs. ................ r61766 | georg.brandl | 2008-03-22 22:26:44 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in operator docs. ................ r61767 | georg.brandl | 2008-03-22 22:38:33 +0100 (Sat, 22 Mar 2008) | 2 lines Enable doctests in functions.rst. Already found two errors :) ................ r61769 | georg.brandl | 2008-03-22 23:04:10 +0100 (Sat, 22 Mar 2008) | 3 lines Enable doctest running for several other documents. We have now over 640 doctests that are run with "make doctest". ................ r61773 | raymond.hettinger | 2008-03-23 01:55:46 +0100 (Sun, 23 Mar 2008) | 1 line Simplify demo code. ................ r61776 | neal.norwitz | 2008-03-23 04:43:33 +0100 (Sun, 23 Mar 2008) | 7 lines Try to make this test a little more robust and not fail with: timeout (10.0025) is more than 2 seconds more than expected (0.001) I'm assuming this problem is caused by DNS lookup. This change does a DNS lookup of the hostname before trying to connect, so the time is not included. ................ r61777 | neal.norwitz | 2008-03-23 05:08:30 +0100 (Sun, 23 Mar 2008) | 1 line Speed up the test by avoiding socket timeouts. ................ r61778 | neal.norwitz | 2008-03-23 05:43:09 +0100 (Sun, 23 Mar 2008) | 1 line Skip the epoll test if epoll() does not work ................ r61780 | neal.norwitz | 2008-03-23 06:47:20 +0100 (Sun, 23 Mar 2008) | 1 line Suppress failure (to avoid a flaky test) if we cannot connect to svn.python.org ................ r61781 | neal.norwitz | 2008-03-23 07:13:25 +0100 (Sun, 23 Mar 2008) | 4 lines Move itertools before future_builtins since the latter depends on the former. From a clean build importing future_builtins would fail since itertools wasn't built yet. ................ r61782 | neal.norwitz | 2008-03-23 07:16:04 +0100 (Sun, 23 Mar 2008) | 1 line Try to prevent the alarm going off early in tearDown ................ r61783 | neal.norwitz | 2008-03-23 07:19:57 +0100 (Sun, 23 Mar 2008) | 4 lines Remove compiler warnings (on Alpha at least) about using chars as array subscripts. Using chars are dangerous b/c they are signed on some platforms and unsigned on others. ................ r61788 | georg.brandl | 2008-03-23 09:05:30 +0100 (Sun, 23 Mar 2008) | 2 lines Make the doctests presentation-friendlier. ................ r61793 | amaury.forgeotdarc | 2008-03-23 10:55:29 +0100 (Sun, 23 Mar 2008) | 4 lines #1477: ur'\U0010FFFF' raised in narrow unicode builds. Corrected the raw-unicode-escape codec to use UTF-16 surrogates in this case, just like the unicode-escape codec. ................ r61796 | raymond.hettinger | 2008-03-23 14:32:32 +0100 (Sun, 23 Mar 2008) | 1 line Issue 1681432: Add triangular distribution the random module. ................ r61807 | raymond.hettinger | 2008-03-23 20:37:53 +0100 (Sun, 23 Mar 2008) | 4 lines Adopt Nick's suggestion for useful default arguments. Clean-up floating point issues by adding true division and float constants. ................ r61813 | gregory.p.smith | 2008-03-23 22:04:43 +0100 (Sun, 23 Mar 2008) | 6 lines Fix gzip to deal with CRC's being signed values in Python 2.x properly and to read 32bit values as unsigned to start with rather than applying signedness fixups allover the place afterwards. This hopefully fixes the test_tarfile failure on the alpha/tru64 buildbot. ................
2008-03-23 18:54:12 -03:00
>>> for it in tt: # doctest: +SKIP
... print(it)
2009-01-03 17:18:54 -04:00
...
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
2006 # year
11 # month
21 # day
16 # hour
30 # minute
0 # second
1 # weekday (0 = Monday)
325 # number of days since 1st January
-1 # dst - method tzinfo.dst() returned None
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> # Date in ISO format
>>> ic = dt.isocalendar()
Merged revisions 61724-61725,61731-61735,61737,61739,61741,61743-61744,61753,61761,61765-61767,61769,61773,61776-61778,61780-61783,61788,61793,61796,61807,61813 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r61724 | martin.v.loewis | 2008-03-22 01:01:12 +0100 (Sat, 22 Mar 2008) | 49 lines Merged revisions 61602-61723 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 M?\195?\164r 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 M?\195?\164r 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 M?\195?\164r 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 M?\195?\164r 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 M?\195?\164r 2008) | 2 lines Fix whitespace. ........ ................ r61725 | martin.v.loewis | 2008-03-22 01:02:41 +0100 (Sat, 22 Mar 2008) | 2 lines Install lib2to3. ................ r61731 | facundo.batista | 2008-03-22 03:45:37 +0100 (Sat, 22 Mar 2008) | 4 lines Small fix that complicated the test actually when that test failed. ................ r61732 | alexandre.vassalotti | 2008-03-22 05:08:44 +0100 (Sat, 22 Mar 2008) | 2 lines Added warning for the removal of 'hotshot' in Py3k. ................ r61733 | georg.brandl | 2008-03-22 11:07:29 +0100 (Sat, 22 Mar 2008) | 4 lines #1918: document that weak references *to* an object are cleared before the object's __del__ is called, to ensure that the weak reference callback (if any) finds the object healthy. ................ r61734 | georg.brandl | 2008-03-22 11:56:23 +0100 (Sat, 22 Mar 2008) | 2 lines Activate the Sphinx doctest extension and convert howto/functional to use it. ................ r61735 | georg.brandl | 2008-03-22 11:58:38 +0100 (Sat, 22 Mar 2008) | 2 lines Allow giving source names on the cmdline. ................ r61737 | georg.brandl | 2008-03-22 12:00:48 +0100 (Sat, 22 Mar 2008) | 2 lines Fixup this HOWTO's doctest blocks so that they can be run with sphinx' doctest builder. ................ r61739 | georg.brandl | 2008-03-22 12:47:10 +0100 (Sat, 22 Mar 2008) | 2 lines Test decimal.rst doctests as far as possible with sphinx doctest. ................ r61741 | georg.brandl | 2008-03-22 13:04:26 +0100 (Sat, 22 Mar 2008) | 2 lines Make doctests in re docs usable with sphinx' doctest. ................ r61743 | georg.brandl | 2008-03-22 13:59:37 +0100 (Sat, 22 Mar 2008) | 2 lines Make more doctests in pprint docs testable. ................ r61744 | georg.brandl | 2008-03-22 14:07:06 +0100 (Sat, 22 Mar 2008) | 2 lines No need to specify explicit "doctest_block" anymore. ................ r61753 | georg.brandl | 2008-03-22 21:08:43 +0100 (Sat, 22 Mar 2008) | 2 lines Fix-up syntax problems. ................ r61761 | georg.brandl | 2008-03-22 22:06:20 +0100 (Sat, 22 Mar 2008) | 4 lines Make collections' doctests executable. (The <BLANKLINE>s will be stripped from presentation output.) ................ r61765 | georg.brandl | 2008-03-22 22:21:57 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in datetime docs. ................ r61766 | georg.brandl | 2008-03-22 22:26:44 +0100 (Sat, 22 Mar 2008) | 2 lines Test doctests in operator docs. ................ r61767 | georg.brandl | 2008-03-22 22:38:33 +0100 (Sat, 22 Mar 2008) | 2 lines Enable doctests in functions.rst. Already found two errors :) ................ r61769 | georg.brandl | 2008-03-22 23:04:10 +0100 (Sat, 22 Mar 2008) | 3 lines Enable doctest running for several other documents. We have now over 640 doctests that are run with "make doctest". ................ r61773 | raymond.hettinger | 2008-03-23 01:55:46 +0100 (Sun, 23 Mar 2008) | 1 line Simplify demo code. ................ r61776 | neal.norwitz | 2008-03-23 04:43:33 +0100 (Sun, 23 Mar 2008) | 7 lines Try to make this test a little more robust and not fail with: timeout (10.0025) is more than 2 seconds more than expected (0.001) I'm assuming this problem is caused by DNS lookup. This change does a DNS lookup of the hostname before trying to connect, so the time is not included. ................ r61777 | neal.norwitz | 2008-03-23 05:08:30 +0100 (Sun, 23 Mar 2008) | 1 line Speed up the test by avoiding socket timeouts. ................ r61778 | neal.norwitz | 2008-03-23 05:43:09 +0100 (Sun, 23 Mar 2008) | 1 line Skip the epoll test if epoll() does not work ................ r61780 | neal.norwitz | 2008-03-23 06:47:20 +0100 (Sun, 23 Mar 2008) | 1 line Suppress failure (to avoid a flaky test) if we cannot connect to svn.python.org ................ r61781 | neal.norwitz | 2008-03-23 07:13:25 +0100 (Sun, 23 Mar 2008) | 4 lines Move itertools before future_builtins since the latter depends on the former. From a clean build importing future_builtins would fail since itertools wasn't built yet. ................ r61782 | neal.norwitz | 2008-03-23 07:16:04 +0100 (Sun, 23 Mar 2008) | 1 line Try to prevent the alarm going off early in tearDown ................ r61783 | neal.norwitz | 2008-03-23 07:19:57 +0100 (Sun, 23 Mar 2008) | 4 lines Remove compiler warnings (on Alpha at least) about using chars as array subscripts. Using chars are dangerous b/c they are signed on some platforms and unsigned on others. ................ r61788 | georg.brandl | 2008-03-23 09:05:30 +0100 (Sun, 23 Mar 2008) | 2 lines Make the doctests presentation-friendlier. ................ r61793 | amaury.forgeotdarc | 2008-03-23 10:55:29 +0100 (Sun, 23 Mar 2008) | 4 lines #1477: ur'\U0010FFFF' raised in narrow unicode builds. Corrected the raw-unicode-escape codec to use UTF-16 surrogates in this case, just like the unicode-escape codec. ................ r61796 | raymond.hettinger | 2008-03-23 14:32:32 +0100 (Sun, 23 Mar 2008) | 1 line Issue 1681432: Add triangular distribution the random module. ................ r61807 | raymond.hettinger | 2008-03-23 20:37:53 +0100 (Sun, 23 Mar 2008) | 4 lines Adopt Nick's suggestion for useful default arguments. Clean-up floating point issues by adding true division and float constants. ................ r61813 | gregory.p.smith | 2008-03-23 22:04:43 +0100 (Sun, 23 Mar 2008) | 6 lines Fix gzip to deal with CRC's being signed values in Python 2.x properly and to read 32bit values as unsigned to start with rather than applying signedness fixups allover the place afterwards. This hopefully fixes the test_tarfile failure on the alpha/tru64 buildbot. ................
2008-03-23 18:54:12 -03:00
>>> for it in ic: # doctest: +SKIP
... print(it)
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
...
2006 # ISO year
47 # ISO week
2 # ISO weekday
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> # Formatting a datetime
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> dt.strftime("%A, %d. %B %Y %I:%M%p")
'Tuesday, 21. November 2006 04:30PM'
>>> 'The {1} is {0:%d}, the {2} is {0:%B}, the {3} is {0:%I:%M%p}.'.format(dt, "day", "month", "time")
'The day is 21, the month is November, the time is 04:30PM.'
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The example below defines a :class:`tzinfo` subclass capturing time zone
information for Kabul, Afghanistan, which used +4 UTC until 1945
and then +4:30 UTC thereafter::
from datetime import timedelta, datetime, tzinfo, timezone
class KabulTz(tzinfo):
# Kabul used +4 until 1945, when they moved to +4:30
UTC_MOVE_DATE = datetime(1944, 12, 31, 20, tzinfo=timezone.utc)
def utcoffset(self, dt):
if dt.year < 1945:
return timedelta(hours=4)
elif (1945, 1, 1, 0, 0) <= dt.timetuple()[:5] < (1945, 1, 1, 0, 30):
# An ambiguous ("imaginary") half-hour range representing
# a 'fold' in time due to the shift from +4 to +4:30.
# If dt falls in the imaginary range, use fold to decide how
# to resolve. See PEP495.
return timedelta(hours=4, minutes=(30 if dt.fold else 0))
else:
return timedelta(hours=4, minutes=30)
def fromutc(self, dt):
# Follow same validations as in datetime.tzinfo
if not isinstance(dt, datetime):
raise TypeError("fromutc() requires a datetime argument")
if dt.tzinfo is not self:
raise ValueError("dt.tzinfo is not self")
# A custom implementation is required for fromutc as
# the input to this function is a datetime with utc values
# but with a tzinfo set to self.
# See datetime.astimezone or fromtimestamp.
if dt.replace(tzinfo=timezone.utc) >= self.UTC_MOVE_DATE:
return dt + timedelta(hours=4, minutes=30)
else:
return dt + timedelta(hours=4)
def dst(self, dt):
# Kabul does not observe daylight saving time.
return timedelta(0)
def tzname(self, dt):
if dt >= self.UTC_MOVE_DATE:
return "+04:30"
return "+04"
Usage of ``KabulTz`` from above::
>>> tz1 = KabulTz()
>>> # Datetime before the change
>>> dt1 = datetime(1900, 11, 21, 16, 30, tzinfo=tz1)
>>> print(dt1.utcoffset())
4:00:00
>>> # Datetime after the change
>>> dt2 = datetime(2006, 6, 14, 13, 0, tzinfo=tz1)
>>> print(dt2.utcoffset())
4:30:00
>>> # Convert datetime to another time zone
>>> dt3 = dt2.astimezone(timezone.utc)
>>> dt3
datetime.datetime(2006, 6, 14, 8, 30, tzinfo=datetime.timezone.utc)
>>> dt2
datetime.datetime(2006, 6, 14, 13, 0, tzinfo=KabulTz())
>>> dt2 == dt3
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
True
2007-08-15 11:28:22 -03:00
.. _datetime-time:
:class:`.time` Objects
----------------------
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
A :class:`time` object represents a (local) time of day, independent of any particular
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day, and subject to adjustment via a :class:`tzinfo` object.
.. class:: time(hour=0, minute=0, second=0, microsecond=0, tzinfo=None, *, fold=0)
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
All arguments are optional. *tzinfo* may be ``None``, or an instance of a
:class:`tzinfo` subclass. The remaining arguments must be integers in the
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following ranges:
* ``0 <= hour < 24``,
* ``0 <= minute < 60``,
* ``0 <= second < 60``,
* ``0 <= microsecond < 1000000``,
* ``fold in [0, 1]``.
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
If an argument outside those ranges is given, :exc:`ValueError` is raised. All
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default to ``0`` except *tzinfo*, which defaults to :const:`None`.
Class attributes:
.. attribute:: time.min
The earliest representable :class:`.time`, ``time(0, 0, 0, 0)``.
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.. attribute:: time.max
The latest representable :class:`.time`, ``time(23, 59, 59, 999999)``.
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.. attribute:: time.resolution
The smallest possible difference between non-equal :class:`.time` objects,
``timedelta(microseconds=1)``, although note that arithmetic on
:class:`.time` objects is not supported.
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Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Instance attributes (read-only):
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.. attribute:: time.hour
In ``range(24)``.
.. attribute:: time.minute
In ``range(60)``.
.. attribute:: time.second
In ``range(60)``.
.. attribute:: time.microsecond
In ``range(1000000)``.
.. attribute:: time.tzinfo
The object passed as the tzinfo argument to the :class:`.time` constructor, or
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``None`` if none was passed.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. attribute:: time.fold
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
In ``[0, 1]``. Used to disambiguate wall times during a repeated interval. (A
repeated interval occurs when clocks are rolled back at the end of daylight saving
time or when the UTC offset for the current zone is decreased for political reasons.)
The value 0 (1) represents the earlier (later) of the two moments with the same wall
time representation.
.. versionadded:: 3.6
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:class:`.time` objects support comparison of :class:`.time` to :class:`.time`,
where *a* is considered less
than *b* when *a* precedes *b* in time. If one comparand is naive and the other
is aware, :exc:`TypeError` is raised if an order comparison is attempted. For equality
comparisons, naive instances are never equal to aware instances.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
If both comparands are aware, and have
the same :attr:`~time.tzinfo` attribute, the common :attr:`~time.tzinfo` attribute is
ignored and the base times are compared. If both comparands are aware and
have different :attr:`~time.tzinfo` attributes, the comparands are first adjusted by
subtracting their UTC offsets (obtained from ``self.utcoffset()``). In order
to stop mixed-type comparisons from falling back to the default comparison by
object address, when a :class:`.time` object is compared to an object of a
different type, :exc:`TypeError` is raised unless the comparison is ``==`` or
``!=``. The latter cases return :const:`False` or :const:`True`, respectively.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
.. versionchanged:: 3.3
Equality comparisons between aware and naive :class:`~datetime.time` instances
don't raise :exc:`TypeError`.
2007-08-15 11:28:22 -03:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
In Boolean contexts, a :class:`.time` object is always considered to be true.
2007-08-15 11:28:22 -03:00
.. versionchanged:: 3.5
Before Python 3.5, a :class:`.time` object was considered to be false if it
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
represented midnight in UTC. This behavior was considered obscure and
error-prone and has been removed in Python 3.5. See :issue:`13936` for full
details.
2007-08-15 11:28:22 -03:00
Other constructor:
.. classmethod:: time.fromisoformat(time_string)
Return a :class:`.time` corresponding to a *time_string* in any valid
ISO 8601 format, with the following exceptions:
1. Time zone offsets may have fractional seconds.
2. The leading ``T``, normally required in cases where there may be ambiguity between
a date and a time, is not required.
3. Fractional seconds may have any number of digits (anything beyond 6 will
be truncated).
4. Fractional hours and minutes are not supported.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Examples::
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> from datetime import time
>>> time.fromisoformat('04:23:01')
datetime.time(4, 23, 1)
>>> time.fromisoformat('T04:23:01')
datetime.time(4, 23, 1)
>>> time.fromisoformat('T042301')
datetime.time(4, 23, 1)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> time.fromisoformat('04:23:01.000384')
datetime.time(4, 23, 1, 384)
>>> time.fromisoformat('04:23:01,000')
datetime.time(4, 23, 1, 384)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
>>> time.fromisoformat('04:23:01+04:00')
datetime.time(4, 23, 1, tzinfo=datetime.timezone(datetime.timedelta(seconds=14400)))
>>> time.fromisoformat('04:23:01Z')
datetime.time(4, 23, 1, tzinfo=datetime.timezone.utc)
>>> time.fromisoformat('04:23:01+00:00')
datetime.time(4, 23, 1, tzinfo=datetime.timezone.utc)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
.. versionadded:: 3.7
.. versionchanged:: 3.11
Previously, this method only supported formats that could be emitted by
:meth:`time.isoformat()`.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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Instance methods:
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.. method:: time.replace(hour=self.hour, minute=self.minute, second=self.second, \
microsecond=self.microsecond, tzinfo=self.tzinfo, *, fold=0)
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Return a :class:`.time` with the same value, except for those attributes given
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
new values by whichever keyword arguments are specified. Note that
``tzinfo=None`` can be specified to create a naive :class:`.time` from an
aware :class:`.time`, without conversion of the time data.
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.. versionadded:: 3.6
Added the ``fold`` argument.
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.. method:: time.isoformat(timespec='auto')
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Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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Return a string representing the time in ISO 8601 format, one of:
- ``HH:MM:SS.ffffff``, if :attr:`microsecond` is not 0
- ``HH:MM:SS``, if :attr:`microsecond` is 0
- ``HH:MM:SS.ffffff+HH:MM[:SS[.ffffff]]``, if :meth:`utcoffset` does not return ``None``
- ``HH:MM:SS+HH:MM[:SS[.ffffff]]``, if :attr:`microsecond` is 0 and :meth:`utcoffset` does not return ``None``
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The optional argument *timespec* specifies the number of additional
components of the time to include (the default is ``'auto'``).
It can be one of the following:
- ``'auto'``: Same as ``'seconds'`` if :attr:`microsecond` is 0,
same as ``'microseconds'`` otherwise.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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- ``'hours'``: Include the :attr:`hour` in the two-digit ``HH`` format.
- ``'minutes'``: Include :attr:`hour` and :attr:`minute` in ``HH:MM`` format.
- ``'seconds'``: Include :attr:`hour`, :attr:`minute`, and :attr:`second`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
in ``HH:MM:SS`` format.
- ``'milliseconds'``: Include full time, but truncate fractional second
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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part to milliseconds. ``HH:MM:SS.sss`` format.
- ``'microseconds'``: Include full time in ``HH:MM:SS.ffffff`` format.
.. note::
Excluded time components are truncated, not rounded.
:exc:`ValueError` will be raised on an invalid *timespec* argument.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Example::
>>> from datetime import time
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>>> time(hour=12, minute=34, second=56, microsecond=123456).isoformat(timespec='minutes')
'12:34'
2016-06-05 01:36:53 -03:00
>>> dt = time(hour=12, minute=34, second=56, microsecond=0)
>>> dt.isoformat(timespec='microseconds')
'12:34:56.000000'
>>> dt.isoformat(timespec='auto')
'12:34:56'
.. versionadded:: 3.6
Added the *timespec* argument.
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.. method:: time.__str__()
For a time *t*, ``str(t)`` is equivalent to ``t.isoformat()``.
.. method:: time.strftime(format)
Return a string representing the time, controlled by an explicit format
string. See also :ref:`strftime-strptime-behavior` and :meth:`time.isoformat`.
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.. method:: time.__format__(format)
Same as :meth:`.time.strftime`. This makes it possible to specify
a format string for a :class:`.time` object in :ref:`formatted string
literals <f-strings>` and when using :meth:`str.format`.
See also :ref:`strftime-strptime-behavior` and :meth:`time.isoformat`.
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.. method:: time.utcoffset()
If :attr:`.tzinfo` is ``None``, returns ``None``, else returns
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``self.tzinfo.utcoffset(None)``, and raises an exception if the latter doesn't
return ``None`` or a :class:`timedelta` object with magnitude less than one day.
.. versionchanged:: 3.7
The UTC offset is not restricted to a whole number of minutes.
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.. method:: time.dst()
If :attr:`.tzinfo` is ``None``, returns ``None``, else returns
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``self.tzinfo.dst(None)``, and raises an exception if the latter doesn't return
``None``, or a :class:`timedelta` object with magnitude less than one day.
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.. versionchanged:: 3.7
The DST offset is not restricted to a whole number of minutes.
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.. method:: time.tzname()
If :attr:`.tzinfo` is ``None``, returns ``None``, else returns
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``self.tzinfo.tzname(None)``, or raises an exception if the latter doesn't
return ``None`` or a string object.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Examples of Usage: :class:`.time`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Examples of working with a :class:`.time` object::
2009-01-03 17:18:54 -04:00
>>> from datetime import time, tzinfo, timedelta
>>> class TZ1(tzinfo):
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
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... def utcoffset(self, dt):
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... return timedelta(hours=1)
... def dst(self, dt):
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
... return timedelta(0)
... def tzname(self,dt):
... return "+01:00"
... def __repr__(self):
... return f"{self.__class__.__name__}()"
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
...
>>> t = time(12, 10, 30, tzinfo=TZ1())
>>> t
datetime.time(12, 10, 30, tzinfo=TZ1())
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> t.isoformat()
'12:10:30+01:00'
>>> t.dst()
datetime.timedelta(0)
>>> t.tzname()
'+01:00'
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
>>> t.strftime("%H:%M:%S %Z")
'12:10:30 +01:00'
>>> 'The {} is {:%H:%M}.'.format("time", t)
'The time is 12:10.'
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
2007-08-15 11:28:22 -03:00
.. _datetime-tzinfo:
:class:`tzinfo` Objects
-----------------------
.. class:: tzinfo()
This is an abstract base class, meaning that this class should not be
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
instantiated directly. Define a subclass of :class:`tzinfo` to capture
information about a particular time zone.
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An instance of (a concrete subclass of) :class:`tzinfo` can be passed to the
constructors for :class:`.datetime` and :class:`.time` objects. The latter objects
view their attributes as being in local time, and the :class:`tzinfo` object
supports methods revealing offset of local time from UTC, the name of the time
zone, and DST offset, all relative to a date or time object passed to them.
2007-08-15 11:28:22 -03:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
You need to derive a concrete subclass, and (at least)
supply implementations of the standard :class:`tzinfo` methods needed by the
:class:`.datetime` methods you use. The :mod:`datetime` module provides
:class:`timezone`, a simple concrete subclass of :class:`tzinfo` which can
represent timezones with fixed offset from UTC such as UTC itself or North
American EST and EDT.
Special requirement for pickling: A :class:`tzinfo` subclass must have an
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:meth:`__init__` method that can be called with no arguments, otherwise it can be
pickled but possibly not unpickled again. This is a technical requirement that
may be relaxed in the future.
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A concrete subclass of :class:`tzinfo` may need to implement the following
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
methods. Exactly which methods are needed depends on the uses made of aware
:mod:`datetime` objects. If in doubt, simply implement all of them.
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2010-06-15 16:24:52 -03:00
.. method:: tzinfo.utcoffset(dt)
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Return offset of local time from UTC, as a :class:`timedelta` object that is
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
positive east of UTC. If local time is west of UTC, this should be negative.
This represents the *total* offset from UTC; for example, if a
:class:`tzinfo` object represents both time zone and DST adjustments,
:meth:`utcoffset` should return their sum. If the UTC offset isn't known,
return ``None``. Else the value returned must be a :class:`timedelta` object
strictly between ``-timedelta(hours=24)`` and ``timedelta(hours=24)``
(the magnitude of the offset must be less than one day). Most implementations
of :meth:`utcoffset` will probably look like one of these two::
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return CONSTANT # fixed-offset class
return CONSTANT + self.dst(dt) # daylight-aware class
If :meth:`utcoffset` does not return ``None``, :meth:`dst` should not return
``None`` either.
The default implementation of :meth:`utcoffset` raises
:exc:`NotImplementedError`.
.. versionchanged:: 3.7
The UTC offset is not restricted to a whole number of minutes.
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.. method:: tzinfo.dst(dt)
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Return the daylight saving time (DST) adjustment, as a :class:`timedelta`
object or
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
``None`` if DST information isn't known.
Return ``timedelta(0)`` if DST is not in effect.
If DST is in effect, return the offset as a :class:`timedelta` object
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(see :meth:`utcoffset` for details). Note that DST offset, if applicable, has
already been added to the UTC offset returned by :meth:`utcoffset`, so there's
no need to consult :meth:`dst` unless you're interested in obtaining DST info
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
separately. For example, :meth:`datetime.timetuple` calls its :attr:`~.datetime.tzinfo`
attribute's :meth:`dst` method to determine how the :attr:`tm_isdst` flag
should be set, and :meth:`tzinfo.fromutc` calls :meth:`dst` to account for
DST changes when crossing time zones.
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An instance *tz* of a :class:`tzinfo` subclass that models both standard and
daylight times must be consistent in this sense:
``tz.utcoffset(dt) - tz.dst(dt)``
must return the same result for every :class:`.datetime` *dt* with ``dt.tzinfo ==
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tz`` For sane :class:`tzinfo` subclasses, this expression yields the time
zone's "standard offset", which should not depend on the date or the time, but
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
only on geographic location. The implementation of :meth:`datetime.astimezone`
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relies on this, but cannot detect violations; it's the programmer's
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
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responsibility to ensure it. If a :class:`tzinfo` subclass cannot guarantee
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this, it may be able to override the default implementation of
:meth:`tzinfo.fromutc` to work correctly with :meth:`astimezone` regardless.
Most implementations of :meth:`dst` will probably look like one of these two::
def dst(self, dt):
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# a fixed-offset class: doesn't account for DST
return timedelta(0)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
or::
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def dst(self, dt):
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# Code to set dston and dstoff to the time zone's DST
# transition times based on the input dt.year, and expressed
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
# in standard local time.
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if dston <= dt.replace(tzinfo=None) < dstoff:
return timedelta(hours=1)
else:
return timedelta(0)
The default implementation of :meth:`dst` raises :exc:`NotImplementedError`.
.. versionchanged:: 3.7
The DST offset is not restricted to a whole number of minutes.
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2010-06-15 16:24:52 -03:00
.. method:: tzinfo.tzname(dt)
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Return the time zone name corresponding to the :class:`.datetime` object *dt*, as
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a string. Nothing about string names is defined by the :mod:`datetime` module,
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
and there's no requirement that it mean anything in particular. For example,
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"GMT", "UTC", "-500", "-5:00", "EDT", "US/Eastern", "America/New York" are all
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
valid replies. Return ``None`` if a string name isn't known. Note that this is
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a method rather than a fixed string primarily because some :class:`tzinfo`
subclasses will wish to return different names depending on the specific value
of *dt* passed, especially if the :class:`tzinfo` class is accounting for
daylight time.
The default implementation of :meth:`tzname` raises :exc:`NotImplementedError`.
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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These methods are called by a :class:`.datetime` or :class:`.time` object, in
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
response to their methods of the same names. A :class:`.datetime` object passes
itself as the argument, and a :class:`.time` object passes ``None`` as the
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
argument. A :class:`tzinfo` subclass's methods should therefore be prepared to
accept a *dt* argument of ``None``, or of class :class:`.datetime`.
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When ``None`` is passed, it's up to the class designer to decide the best
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
response. For example, returning ``None`` is appropriate if the class wishes to
say that time objects don't participate in the :class:`tzinfo` protocols. It
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may be more useful for ``utcoffset(None)`` to return the standard UTC offset, as
there is no other convention for discovering the standard offset.
When a :class:`.datetime` object is passed in response to a :class:`.datetime`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
method, ``dt.tzinfo`` is the same object as *self*. :class:`tzinfo` methods can
rely on this, unless user code calls :class:`tzinfo` methods directly. The
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intent is that the :class:`tzinfo` methods interpret *dt* as being in local
time, and not need worry about objects in other timezones.
There is one more :class:`tzinfo` method that a subclass may wish to override:
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.. method:: tzinfo.fromutc(dt)
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This is called from the default :class:`datetime.astimezone()`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
implementation. When called from that, ``dt.tzinfo`` is *self*, and *dt*'s
date and time data are to be viewed as expressing a UTC time. The purpose
of :meth:`fromutc` is to adjust the date and time data, returning an
equivalent datetime in *self*'s local time.
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Most :class:`tzinfo` subclasses should be able to inherit the default
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:meth:`fromutc` implementation without problems. It's strong enough to handle
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fixed-offset time zones, and time zones accounting for both standard and
daylight time, and the latter even if the DST transition times differ in
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
different years. An example of a time zone the default :meth:`fromutc`
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implementation may not handle correctly in all cases is one where the standard
offset (from UTC) depends on the specific date and time passed, which can happen
for political reasons. The default implementations of :meth:`astimezone` and
:meth:`fromutc` may not produce the result you want if the result is one of the
hours straddling the moment the standard offset changes.
Skipping code for error cases, the default :meth:`fromutc` implementation acts
like::
def fromutc(self, dt):
# raise ValueError error if dt.tzinfo is not self
dtoff = dt.utcoffset()
dtdst = dt.dst()
# raise ValueError if dtoff is None or dtdst is None
delta = dtoff - dtdst # this is self's standard offset
if delta:
dt += delta # convert to standard local time
dtdst = dt.dst()
# raise ValueError if dtdst is None
if dtdst:
return dt + dtdst
else:
return dt
In the following :download:`tzinfo_examples.py
<../includes/tzinfo_examples.py>` file there are some examples of
:class:`tzinfo` classes:
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.. literalinclude:: ../includes/tzinfo_examples.py
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Note that there are unavoidable subtleties twice per year in a :class:`tzinfo`
subclass accounting for both standard and daylight time, at the DST transition
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
points. For concreteness, consider US Eastern (UTC -0500), where EDT begins the
minute after 1:59 (EST) on the second Sunday in March, and ends the minute after
1:59 (EDT) on the first Sunday in November::
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UTC 3:MM 4:MM 5:MM 6:MM 7:MM 8:MM
EST 22:MM 23:MM 0:MM 1:MM 2:MM 3:MM
EDT 23:MM 0:MM 1:MM 2:MM 3:MM 4:MM
start 22:MM 23:MM 0:MM 1:MM 3:MM 4:MM
end 23:MM 0:MM 1:MM 1:MM 2:MM 3:MM
When DST starts (the "start" line), the local wall clock leaps from 1:59 to
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
3:00. A wall time of the form 2:MM doesn't really make sense on that day, so
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``astimezone(Eastern)`` won't deliver a result with ``hour == 2`` on the day DST
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
begins. For example, at the Spring forward transition of 2016, we get::
>>> from datetime import datetime, timezone
>>> from tzinfo_examples import HOUR, Eastern
>>> u0 = datetime(2016, 3, 13, 5, tzinfo=timezone.utc)
>>> for i in range(4):
... u = u0 + i*HOUR
... t = u.astimezone(Eastern)
... print(u.time(), 'UTC =', t.time(), t.tzname())
...
05:00:00 UTC = 00:00:00 EST
06:00:00 UTC = 01:00:00 EST
07:00:00 UTC = 03:00:00 EDT
08:00:00 UTC = 04:00:00 EDT
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When DST ends (the "end" line), there's a potentially worse problem: there's an
hour that can't be spelled unambiguously in local wall time: the last hour of
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
daylight time. In Eastern, that's times of the form 5:MM UTC on the day
daylight time ends. The local wall clock leaps from 1:59 (daylight time) back
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to 1:00 (standard time) again. Local times of the form 1:MM are ambiguous.
:meth:`astimezone` mimics the local clock's behavior by mapping two adjacent UTC
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
hours into the same local hour then. In the Eastern example, UTC times of the
form 5:MM and 6:MM both map to 1:MM when converted to Eastern, but earlier times
have the :attr:`~datetime.fold` attribute set to 0 and the later times have it set to 1.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
For example, at the Fall back transition of 2016, we get::
>>> u0 = datetime(2016, 11, 6, 4, tzinfo=timezone.utc)
>>> for i in range(4):
... u = u0 + i*HOUR
... t = u.astimezone(Eastern)
... print(u.time(), 'UTC =', t.time(), t.tzname(), t.fold)
...
04:00:00 UTC = 00:00:00 EDT 0
05:00:00 UTC = 01:00:00 EDT 0
06:00:00 UTC = 01:00:00 EST 1
07:00:00 UTC = 02:00:00 EST 0
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Note that the :class:`.datetime` instances that differ only by the value of the
:attr:`~datetime.fold` attribute are considered equal in comparisons.
2007-08-15 11:28:22 -03:00
Applications that can't bear wall-time ambiguities should explicitly check the
value of the :attr:`~datetime.fold` attribute or avoid using hybrid
:class:`tzinfo` subclasses; there are no ambiguities when using :class:`timezone`,
or any other fixed-offset :class:`tzinfo` subclass (such as a class representing
only EST (fixed offset -5 hours), or only EDT (fixed offset -4 hours)).
.. seealso::
:mod:`zoneinfo`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The :mod:`datetime` module has a basic :class:`timezone` class (for
handling arbitrary fixed offsets from UTC) and its :attr:`timezone.utc`
attribute (a UTC timezone instance).
``zoneinfo`` brings the *IANA timezone database* (also known as the Olson
database) to Python, and its usage is recommended.
`IANA timezone database <https://www.iana.org/time-zones>`_
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The Time Zone Database (often called tz, tzdata or zoneinfo) contains code
and data that represent the history of local time for many representative
locations around the globe. It is updated periodically to reflect changes
made by political bodies to time zone boundaries, UTC offsets, and
daylight-saving rules.
.. _datetime-timezone:
:class:`timezone` Objects
--------------------------
The :class:`timezone` class is a subclass of :class:`tzinfo`, each
instance of which represents a timezone defined by a fixed offset from
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
UTC.
Objects of this class cannot be used to represent timezone information in the
locations where different offsets are used in different days of the year or
where historical changes have been made to civil time.
.. class:: timezone(offset, name=None)
2010-06-15 16:24:52 -03:00
The *offset* argument must be specified as a :class:`timedelta`
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
object representing the difference between the local time and UTC. It must
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be strictly between ``-timedelta(hours=24)`` and
``timedelta(hours=24)``, otherwise :exc:`ValueError` is raised.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The *name* argument is optional. If specified it must be a string that
will be used as the value returned by the :meth:`datetime.tzname` method.
.. versionadded:: 3.2
.. versionchanged:: 3.7
The UTC offset is not restricted to a whole number of minutes.
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.. method:: timezone.utcoffset(dt)
2010-06-15 16:24:52 -03:00
Return the fixed value specified when the :class:`timezone` instance is
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
constructed.
The *dt* argument is ignored. The return value is a :class:`timedelta`
instance equal to the difference between the local time and UTC.
.. versionchanged:: 3.7
The UTC offset is not restricted to a whole number of minutes.
2010-06-15 16:24:52 -03:00
.. method:: timezone.tzname(dt)
Return the fixed value specified when the :class:`timezone` instance
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
is constructed.
If *name* is not provided in the constructor, the name returned by
``tzname(dt)`` is generated from the value of the ``offset`` as follows. If
*offset* is ``timedelta(0)``, the name is "UTC", otherwise it is a string in
the format ``UTC±HH:MM``, where ± is the sign of ``offset``, HH and MM are
two digits of ``offset.hours`` and ``offset.minutes`` respectively.
.. versionchanged:: 3.6
Name generated from ``offset=timedelta(0)`` is now plain ``'UTC'``, not
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
``'UTC+00:00'``.
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.. method:: timezone.dst(dt)
Always returns ``None``.
2010-06-15 16:24:52 -03:00
.. method:: timezone.fromutc(dt)
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Return ``dt + offset``. The *dt* argument must be an aware
:class:`.datetime` instance, with ``tzinfo`` set to ``self``.
Class attributes:
.. attribute:: timezone.utc
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The UTC timezone, ``timezone(timedelta(0))``.
2009-01-03 17:18:54 -04:00
2007-08-15 11:28:22 -03:00
.. index::
single: % (percent); datetime format
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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.. _strftime-strptime-behavior:
2007-08-15 11:28:22 -03:00
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
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:meth:`strftime` and :meth:`strptime` Behavior
----------------------------------------------
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:class:`date`, :class:`.datetime`, and :class:`.time` objects all support a
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``strftime(format)`` method, to create a string representing the time under the
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
control of an explicit format string.
2007-08-15 11:28:22 -03:00
Merged revisions 77484,77487,77561,77570,77593,77603,77608,77667,77702-77703,77739,77858,77887,77889 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77484 | skip.montanaro | 2010-01-13 19:12:34 -0600 (Wed, 13 Jan 2010) | 4 lines Update PyEval_EvalFrame to PyEval_EvalFrameEx. This looks to have been done partially before. Also add a comment describing how this might have to work with different versions of the interpreter. ........ r77487 | ezio.melotti | 2010-01-14 05:34:10 -0600 (Thu, 14 Jan 2010) | 1 line Fixed typo ........ r77561 | georg.brandl | 2010-01-17 02:42:30 -0600 (Sun, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 06:14:42 -0600 (Sun, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........ r77593 | georg.brandl | 2010-01-17 17:33:53 -0600 (Sun, 17 Jan 2010) | 1 line Fix internal reference. ........ r77603 | benjamin.peterson | 2010-01-18 17:07:56 -0600 (Mon, 18 Jan 2010) | 8 lines data descriptors do not override the class dictionary if __get__ is not defined Adjust documentation and add a test to verify this behavior. See http://mail.python.org/pipermail/python-dev/2010-January/095637.html for discussion. ........ r77608 | gregory.p.smith | 2010-01-19 02:19:03 -0600 (Tue, 19 Jan 2010) | 6 lines Do not compile stubs for the sha2 series hashes in the openssl hashlib module when the openssl version is too old to support them. That leads both compiled code bloat and to unittests attempting to test implementations that don't exist for comparison purposes on such platforms. ........ r77667 | mark.dickinson | 2010-01-21 12:32:27 -0600 (Thu, 21 Jan 2010) | 1 line Add two more test_strtod test values. ........ r77702 | georg.brandl | 2010-01-23 02:43:31 -0600 (Sat, 23 Jan 2010) | 1 line #7762: fix refcount annotation of PyUnicode_Tailmatch(). ........ r77703 | georg.brandl | 2010-01-23 02:47:54 -0600 (Sat, 23 Jan 2010) | 1 line #7725: fix referencing issue. ........ r77739 | benjamin.peterson | 2010-01-24 21:52:52 -0600 (Sun, 24 Jan 2010) | 1 line mention from_float() in error message ........ r77858 | georg.brandl | 2010-01-30 11:57:48 -0600 (Sat, 30 Jan 2010) | 1 line #7802: fix invalid example (heh). ........ r77887 | georg.brandl | 2010-01-31 12:51:49 -0600 (Sun, 31 Jan 2010) | 5 lines Fix-up ftplib documentation: move exception descriptions to toplevel, not inside a class remove attribution in "versionadded" spell and grammar check docstring of FTP_TLS ........ r77889 | michael.foord | 2010-01-31 13:59:26 -0600 (Sun, 31 Jan 2010) | 1 line Minor modification to unittest documentation. ........
2010-02-02 22:35:45 -04:00
Conversely, the :meth:`datetime.strptime` class method creates a
:class:`.datetime` object from a string representing a date and time and a
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
corresponding format string.
2007-08-15 11:28:22 -03:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The table below provides a high-level comparison of :meth:`strftime`
versus :meth:`strptime`:
Merged revisions 61239-61249,61252-61257,61260-61264,61269-61275,61278-61279,61285-61286,61288-61290,61298,61303-61305,61312-61314,61317,61329,61332,61344,61350-61351,61363-61376,61378-61379,61382-61383,61387-61388,61392,61395-61396,61402-61403 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r61239 | andrew.kuchling | 2008-03-05 01:44:41 +0100 (Wed, 05 Mar 2008) | 1 line Add more items; add fragmentary notes ........ r61240 | amaury.forgeotdarc | 2008-03-05 02:50:33 +0100 (Wed, 05 Mar 2008) | 13 lines Issue#2238: some syntax errors from *args or **kwargs expressions would give bogus error messages, because of untested exceptions:: >>> f(**g(1=2)) XXX undetected error Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'int' object is not iterable instead of the expected SyntaxError: keyword can't be an expression Will backport. ........ r61241 | neal.norwitz | 2008-03-05 06:10:48 +0100 (Wed, 05 Mar 2008) | 3 lines Remove the files/dirs after closing the DB so the tests work on Windows. Patch from Trent Nelson. Also simplified removing a file by using test_support. ........ r61242 | neal.norwitz | 2008-03-05 06:14:18 +0100 (Wed, 05 Mar 2008) | 3 lines Get this test to pass even when there is no sound card in the system. Patch from Trent Nelson. (I can't test this.) ........ r61243 | neal.norwitz | 2008-03-05 06:20:44 +0100 (Wed, 05 Mar 2008) | 3 lines Catch OSError when trying to remove a file in case removal fails. This should prevent a failure in tearDown masking any real test failure. ........ r61244 | neal.norwitz | 2008-03-05 06:38:06 +0100 (Wed, 05 Mar 2008) | 5 lines Make the timeout longer to give slow machines a chance to pass the test before timing out. This doesn't change the duration of the test under normal circumstances. This is targetted at fixing the spurious failures on the FreeBSD buildbot primarily. ........ r61245 | neal.norwitz | 2008-03-05 06:49:03 +0100 (Wed, 05 Mar 2008) | 1 line Tabs -> spaces ........ r61246 | neal.norwitz | 2008-03-05 06:50:20 +0100 (Wed, 05 Mar 2008) | 1 line Use -u urlfetch to run more tests ........ r61247 | neal.norwitz | 2008-03-05 06:51:20 +0100 (Wed, 05 Mar 2008) | 1 line test_smtplib sometimes reports leaks too, suppress it ........ r61248 | jeffrey.yasskin | 2008-03-05 07:19:56 +0100 (Wed, 05 Mar 2008) | 5 lines Fix test_socketserver on Windows after r61099 added several signal.alarm() calls (which don't exist on non-Unix platforms). Thanks to Trent Nelson for the report and patch. ........ r61249 | georg.brandl | 2008-03-05 08:10:35 +0100 (Wed, 05 Mar 2008) | 2 lines Fix some rst. ........ r61252 | thomas.heller | 2008-03-05 15:53:39 +0100 (Wed, 05 Mar 2008) | 2 lines News entry for yesterdays commit. ........ r61253 | thomas.heller | 2008-03-05 16:34:29 +0100 (Wed, 05 Mar 2008) | 3 lines Issue 1872: Changed the struct module typecode from 't' to '?', for compatibility with PEP3118. ........ r61254 | skip.montanaro | 2008-03-05 17:41:09 +0100 (Wed, 05 Mar 2008) | 4 lines Elaborate on the role of the altinstall target when installing multiple versions. ........ r61255 | georg.brandl | 2008-03-05 20:31:44 +0100 (Wed, 05 Mar 2008) | 2 lines #2239: PYTHONPATH delimiter is os.pathsep. ........ r61256 | raymond.hettinger | 2008-03-05 21:59:58 +0100 (Wed, 05 Mar 2008) | 1 line C implementation of itertools.permutations(). ........ r61257 | raymond.hettinger | 2008-03-05 22:04:32 +0100 (Wed, 05 Mar 2008) | 1 line Small code cleanup. ........ r61260 | martin.v.loewis | 2008-03-05 23:24:31 +0100 (Wed, 05 Mar 2008) | 2 lines cd PCbuild only after deleting all pyc files. ........ r61261 | raymond.hettinger | 2008-03-06 02:15:52 +0100 (Thu, 06 Mar 2008) | 1 line Add examples. ........ r61262 | andrew.kuchling | 2008-03-06 02:36:27 +0100 (Thu, 06 Mar 2008) | 1 line Add two items ........ r61263 | georg.brandl | 2008-03-06 07:47:18 +0100 (Thu, 06 Mar 2008) | 2 lines #1725737: ignore other VC directories other than CVS and SVN's too. ........ r61264 | martin.v.loewis | 2008-03-06 07:55:22 +0100 (Thu, 06 Mar 2008) | 4 lines Patch #2232: os.tmpfile might fail on Windows if the user has no permission to create files in the root directory. Will backport to 2.5. ........ r61269 | georg.brandl | 2008-03-06 08:19:15 +0100 (Thu, 06 Mar 2008) | 2 lines Expand on re.split behavior with captured expressions. ........ r61270 | georg.brandl | 2008-03-06 08:22:09 +0100 (Thu, 06 Mar 2008) | 2 lines Little clarification of assignments. ........ r61271 | georg.brandl | 2008-03-06 08:31:34 +0100 (Thu, 06 Mar 2008) | 2 lines Add isinstance/issubclass to tutorial. ........ r61272 | georg.brandl | 2008-03-06 08:34:52 +0100 (Thu, 06 Mar 2008) | 2 lines Add missing NEWS entry for r61263. ........ r61273 | georg.brandl | 2008-03-06 08:41:16 +0100 (Thu, 06 Mar 2008) | 2 lines #2225: return nonzero status code from py_compile if not all files could be compiled. ........ r61274 | georg.brandl | 2008-03-06 08:43:02 +0100 (Thu, 06 Mar 2008) | 2 lines #2220: handle matching failure more gracefully. ........ r61275 | georg.brandl | 2008-03-06 08:45:52 +0100 (Thu, 06 Mar 2008) | 2 lines Bug #2220: handle rlcompleter attribute match failure more gracefully. ........ r61278 | martin.v.loewis | 2008-03-06 14:49:47 +0100 (Thu, 06 Mar 2008) | 1 line Rely on x64 platform configuration when building _bsddb on AMD64. ........ r61279 | martin.v.loewis | 2008-03-06 14:50:28 +0100 (Thu, 06 Mar 2008) | 1 line Update db-4.4.20 build procedure. ........ r61285 | raymond.hettinger | 2008-03-06 21:52:01 +0100 (Thu, 06 Mar 2008) | 1 line More tests. ........ r61286 | raymond.hettinger | 2008-03-06 23:51:36 +0100 (Thu, 06 Mar 2008) | 1 line Issue 2246: itertools grouper object did not participate in GC (should be backported). ........ r61288 | raymond.hettinger | 2008-03-07 02:33:20 +0100 (Fri, 07 Mar 2008) | 1 line Tweak recipes and tests ........ r61289 | jeffrey.yasskin | 2008-03-07 07:22:15 +0100 (Fri, 07 Mar 2008) | 5 lines Progress on issue #1193577 by adding a polling .shutdown() method to SocketServers. The core of the patch was written by Pedro Werneck, but any bugs are mine. I've also rearranged the code for timeouts in order to avoid interfering with the shutdown poll. ........ r61290 | nick.coghlan | 2008-03-07 15:13:28 +0100 (Fri, 07 Mar 2008) | 1 line Speed up with statements by storing the __exit__ method on the stack instead of in a temp variable (bumps the magic number for pyc files) ........ r61298 | andrew.kuchling | 2008-03-07 22:09:23 +0100 (Fri, 07 Mar 2008) | 1 line Grammar fix ........ r61303 | georg.brandl | 2008-03-08 10:54:06 +0100 (Sat, 08 Mar 2008) | 2 lines #2253: fix continue vs. finally docs. ........ r61304 | marc-andre.lemburg | 2008-03-08 11:01:43 +0100 (Sat, 08 Mar 2008) | 3 lines Add new name for Mandrake: Mandriva. ........ r61305 | georg.brandl | 2008-03-08 11:05:24 +0100 (Sat, 08 Mar 2008) | 2 lines #1533486: fix types in refcount intro. ........ r61312 | facundo.batista | 2008-03-08 17:50:27 +0100 (Sat, 08 Mar 2008) | 5 lines Issue 1106316. post_mortem()'s parameter, traceback, is now optional: it defaults to the traceback of the exception that is currently being handled. ........ r61313 | jeffrey.yasskin | 2008-03-08 19:26:54 +0100 (Sat, 08 Mar 2008) | 2 lines Add tests for with and finally performance to pybench. ........ r61314 | jeffrey.yasskin | 2008-03-08 21:08:21 +0100 (Sat, 08 Mar 2008) | 2 lines Fix pybench for pythons < 2.6, tested back to 2.3. ........ r61317 | jeffrey.yasskin | 2008-03-08 22:35:15 +0100 (Sat, 08 Mar 2008) | 3 lines Well that was dumb. platform.python_implementation returns a function, not a string. ........ r61329 | georg.brandl | 2008-03-09 16:11:39 +0100 (Sun, 09 Mar 2008) | 2 lines #2249: document assertTrue and assertFalse. ........ r61332 | neal.norwitz | 2008-03-09 20:03:42 +0100 (Sun, 09 Mar 2008) | 4 lines Introduce a lock to fix a race condition which caused an exception in the test. Some buildbots were consistently failing (e.g., amd64). Also remove a couple of semi-colons. ........ r61344 | raymond.hettinger | 2008-03-11 01:19:07 +0100 (Tue, 11 Mar 2008) | 1 line Add recipe to docs. ........ r61350 | guido.van.rossum | 2008-03-11 22:18:06 +0100 (Tue, 11 Mar 2008) | 3 lines Fix the overflows in expandtabs(). "This time for sure!" (Exploit at request.) ........ r61351 | raymond.hettinger | 2008-03-11 22:37:46 +0100 (Tue, 11 Mar 2008) | 1 line Improve docs for itemgetter(). Show that it works with slices. ........ r61363 | georg.brandl | 2008-03-13 08:15:56 +0100 (Thu, 13 Mar 2008) | 2 lines #2265: fix example. ........ r61364 | georg.brandl | 2008-03-13 08:17:14 +0100 (Thu, 13 Mar 2008) | 2 lines #2270: fix typo. ........ r61365 | georg.brandl | 2008-03-13 08:21:41 +0100 (Thu, 13 Mar 2008) | 2 lines #1720705: add docs about import/threading interaction, wording by Nick. ........ r61366 | andrew.kuchling | 2008-03-13 12:07:35 +0100 (Thu, 13 Mar 2008) | 1 line Add class decorators ........ r61367 | raymond.hettinger | 2008-03-13 17:43:17 +0100 (Thu, 13 Mar 2008) | 1 line Add 2-to-3 support for the itertools moved to builtins or renamed. ........ r61368 | raymond.hettinger | 2008-03-13 17:43:59 +0100 (Thu, 13 Mar 2008) | 1 line Consistent tense. ........ r61369 | raymond.hettinger | 2008-03-13 20:03:51 +0100 (Thu, 13 Mar 2008) | 1 line Issue 2274: Add heapq.heappushpop(). ........ r61370 | raymond.hettinger | 2008-03-13 20:33:34 +0100 (Thu, 13 Mar 2008) | 1 line Simplify the nlargest() code using heappushpop(). ........ r61371 | brett.cannon | 2008-03-13 21:27:00 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_thread over to unittest. Commits GHOP 237. Thanks Benjamin Peterson for the patch. ........ r61372 | brett.cannon | 2008-03-13 21:33:10 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_tokenize to doctest. Done as GHOP 238 by Josip Dzolonga. ........ r61373 | brett.cannon | 2008-03-13 21:47:41 +0100 (Thu, 13 Mar 2008) | 4 lines Convert test_contains, test_crypt, and test_select to unittest. Patch from GHOP 294 by David Marek. ........ r61374 | brett.cannon | 2008-03-13 22:02:16 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_gdbm to use unittest. Closes issue #1960. Thanks Giampaolo Rodola. ........ r61375 | brett.cannon | 2008-03-13 22:09:28 +0100 (Thu, 13 Mar 2008) | 4 lines Convert test_fcntl to unittest. Closes issue #2055. Thanks Giampaolo Rodola. ........ r61376 | raymond.hettinger | 2008-03-14 06:03:44 +0100 (Fri, 14 Mar 2008) | 1 line Leave heapreplace() unchanged. ........ r61378 | martin.v.loewis | 2008-03-14 14:56:09 +0100 (Fri, 14 Mar 2008) | 2 lines Patch #2284: add -x64 option to rt.bat. ........ r61379 | martin.v.loewis | 2008-03-14 14:57:59 +0100 (Fri, 14 Mar 2008) | 2 lines Use -x64 flag. ........ r61382 | brett.cannon | 2008-03-14 15:03:10 +0100 (Fri, 14 Mar 2008) | 2 lines Remove a bad test. ........ r61383 | mark.dickinson | 2008-03-14 15:23:37 +0100 (Fri, 14 Mar 2008) | 9 lines Issue 705836: Fix struct.pack(">f", 1e40) to behave consistently across platforms: it should now raise OverflowError on all platforms. (Previously it raised OverflowError only on non IEEE 754 platforms.) Also fix the (already existing) test for this behaviour so that it actually raises TestFailed instead of just referencing it. ........ r61387 | thomas.heller | 2008-03-14 22:06:21 +0100 (Fri, 14 Mar 2008) | 1 line Remove unneeded initializer. ........ r61388 | martin.v.loewis | 2008-03-14 22:19:28 +0100 (Fri, 14 Mar 2008) | 2 lines Run debug version, cd to PCbuild. ........ r61392 | georg.brandl | 2008-03-15 00:10:34 +0100 (Sat, 15 Mar 2008) | 2 lines Remove obsolete paragraph. #2288. ........ r61395 | georg.brandl | 2008-03-15 01:20:19 +0100 (Sat, 15 Mar 2008) | 2 lines Fix lots of broken links in the docs, found by Sphinx' external link checker. ........ r61396 | skip.montanaro | 2008-03-15 03:32:49 +0100 (Sat, 15 Mar 2008) | 1 line note that fork and forkpty raise OSError on failure ........ r61402 | skip.montanaro | 2008-03-15 17:04:45 +0100 (Sat, 15 Mar 2008) | 1 line add %f format to datetime - issue 1158 ........ r61403 | skip.montanaro | 2008-03-15 17:07:11 +0100 (Sat, 15 Mar 2008) | 2 lines . ........
2008-03-15 21:07:10 -03:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
+----------------+--------------------------------------------------------+------------------------------------------------------------------------------+
| | ``strftime`` | ``strptime`` |
+================+========================================================+==============================================================================+
| Usage | Convert object to a string according to a given format | Parse a string into a :class:`.datetime` object given a corresponding format |
+----------------+--------------------------------------------------------+------------------------------------------------------------------------------+
| Type of method | Instance method | Class method |
+----------------+--------------------------------------------------------+------------------------------------------------------------------------------+
| Method of | :class:`date`; :class:`.datetime`; :class:`.time` | :class:`.datetime` |
+----------------+--------------------------------------------------------+------------------------------------------------------------------------------+
| Signature | ``strftime(format)`` | ``strptime(date_string, format)`` |
+----------------+--------------------------------------------------------+------------------------------------------------------------------------------+
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
:meth:`strftime` and :meth:`strptime` Format Codes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
These methods accept format codes that can be used to parse and format dates::
>>> datetime.strptime('31/01/22 23:59:59.999999',
... '%d/%m/%y %H:%M:%S.%f')
datetime.datetime(2022, 1, 31, 23, 59, 59, 999999)
>>> _.strftime('%a %d %b %Y, %I:%M%p')
'Mon 31 Jan 2022, 11:59PM'
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
The following is a list of all the format codes that the 1989 C standard
requires, and these work on all platforms with a standard C implementation.
2007-08-15 11:28:22 -03:00
+-----------+--------------------------------+------------------------+-------+
| Directive | Meaning | Example | Notes |
+===========+================================+========================+=======+
| ``%a`` | Weekday as locale's || Sun, Mon, ..., Sat | \(1) |
| | abbreviated name. | (en_US); | |
| | || So, Mo, ..., Sa | |
| | | (de_DE) | |
+-----------+--------------------------------+------------------------+-------+
| ``%A`` | Weekday as locale's full name. || Sunday, Monday, ..., | \(1) |
| | | Saturday (en_US); | |
| | || Sonntag, Montag, ..., | |
| | | Samstag (de_DE) | |
+-----------+--------------------------------+------------------------+-------+
| ``%w`` | Weekday as a decimal number, | 0, 1, ..., 6 | |
| | where 0 is Sunday and 6 is | | |
| | Saturday. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%d`` | Day of the month as a | 01, 02, ..., 31 | \(9) |
| | zero-padded decimal number. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%b`` | Month as locale's abbreviated || Jan, Feb, ..., Dec | \(1) |
| | name. | (en_US); | |
| | || Jan, Feb, ..., Dez | |
| | | (de_DE) | |
+-----------+--------------------------------+------------------------+-------+
| ``%B`` | Month as locale's full name. || January, February, | \(1) |
| | | ..., December (en_US);| |
| | || Januar, Februar, ..., | |
| | | Dezember (de_DE) | |
+-----------+--------------------------------+------------------------+-------+
| ``%m`` | Month as a zero-padded | 01, 02, ..., 12 | \(9) |
| | decimal number. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%y`` | Year without century as a | 00, 01, ..., 99 | \(9) |
| | zero-padded decimal number. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%Y`` | Year with century as a decimal | 0001, 0002, ..., 2013, | \(2) |
| | number. | 2014, ..., 9998, 9999 | |
+-----------+--------------------------------+------------------------+-------+
| ``%H`` | Hour (24-hour clock) as a | 00, 01, ..., 23 | \(9) |
| | zero-padded decimal number. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%I`` | Hour (12-hour clock) as a | 01, 02, ..., 12 | \(9) |
| | zero-padded decimal number. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%p`` | Locale's equivalent of either || AM, PM (en_US); | \(1), |
| | AM or PM. || am, pm (de_DE) | \(3) |
+-----------+--------------------------------+------------------------+-------+
| ``%M`` | Minute as a zero-padded | 00, 01, ..., 59 | \(9) |
| | decimal number. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%S`` | Second as a zero-padded | 00, 01, ..., 59 | \(4), |
| | decimal number. | | \(9) |
+-----------+--------------------------------+------------------------+-------+
| ``%f`` | Microsecond as a decimal | 000000, 000001, ..., | \(5) |
| | number, zero-padded to 6 | 999999 | |
| | digits. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%z`` | UTC offset in the form | (empty), +0000, | \(6) |
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
| | ``±HHMM[SS[.ffffff]]`` (empty | -0400, +1030, | |
| | string if the object is | +063415, | |
| | naive). | -030712.345216 | |
+-----------+--------------------------------+------------------------+-------+
| ``%Z`` | Time zone name (empty string | (empty), UTC, GMT | \(6) |
| | if the object is naive). | | |
+-----------+--------------------------------+------------------------+-------+
| ``%j`` | Day of the year as a | 001, 002, ..., 366 | \(9) |
| | zero-padded decimal number. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%U`` | Week number of the year | 00, 01, ..., 53 | \(7), |
| | (Sunday as the first day of | | \(9) |
| | the week) as a zero-padded | | |
| | decimal number. All days in a | | |
| | new year preceding the first | | |
| | Sunday are considered to be in | | |
| | week 0. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%W`` | Week number of the year | 00, 01, ..., 53 | \(7), |
| | (Monday as the first day of | | \(9) |
| | the week) as a zero-padded | | |
| | decimal number. All days in a | | |
| | new year preceding the first | | |
| | Monday are considered to be in | | |
| | week 0. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%c`` | Locale's appropriate date and || Tue Aug 16 21:30:00 | \(1) |
| | time representation. | 1988 (en_US); | |
| | || Di 16 Aug 21:30:00 | |
| | | 1988 (de_DE) | |
+-----------+--------------------------------+------------------------+-------+
| ``%x`` | Locale's appropriate date || 08/16/88 (None); | \(1) |
| | representation. || 08/16/1988 (en_US); | |
| | || 16.08.1988 (de_DE) | |
+-----------+--------------------------------+------------------------+-------+
| ``%X`` | Locale's appropriate time || 21:30:00 (en_US); | \(1) |
| | representation. || 21:30:00 (de_DE) | |
+-----------+--------------------------------+------------------------+-------+
| ``%%`` | A literal ``'%'`` character. | % | |
+-----------+--------------------------------+------------------------+-------+
2007-08-15 11:28:22 -03:00
Several additional directives not required by the C89 standard are included for
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
convenience. These parameters all correspond to ISO 8601 date values.
+-----------+--------------------------------+------------------------+-------+
| Directive | Meaning | Example | Notes |
+===========+================================+========================+=======+
| ``%G`` | ISO 8601 year with century | 0001, 0002, ..., 2013, | \(8) |
| | representing the year that | 2014, ..., 9998, 9999 | |
| | contains the greater part of | | |
| | the ISO week (``%V``). | | |
+-----------+--------------------------------+------------------------+-------+
| ``%u`` | ISO 8601 weekday as a decimal | 1, 2, ..., 7 | |
| | number where 1 is Monday. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%V`` | ISO 8601 week as a decimal | 01, 02, ..., 53 | \(8), |
| | number with Monday as | | \(9) |
| | the first day of the week. | | |
| | Week 01 is the week containing | | |
| | Jan 4. | | |
+-----------+--------------------------------+------------------------+-------+
| ``%:z`` | UTC offset in the form | (empty), +00:00, | \(6) |
| | ``±HH:MM[:SS[.ffffff]]`` | -04:00, +10:30, | |
| | (empty string if the object is | +06:34:15, | |
| | naive). | -03:07:12.345216 | |
+-----------+--------------------------------+------------------------+-------+
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
These may not be available on all platforms when used with the :meth:`strftime`
method. The ISO 8601 year and ISO 8601 week directives are not interchangeable
with the year and week number directives above. Calling :meth:`strptime` with
incomplete or ambiguous ISO 8601 directives will raise a :exc:`ValueError`.
The full set of format codes supported varies across platforms, because Python
calls the platform C library's :func:`strftime` function, and platform
variations are common. To see the full set of format codes supported on your
platform, consult the :manpage:`strftime(3)` documentation. There are also
differences between platforms in handling of unsupported format specifiers.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
.. versionadded:: 3.6
``%G``, ``%u`` and ``%V`` were added.
.. versionadded:: 3.12
``%:z`` was added.
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
Technical Detail
^^^^^^^^^^^^^^^^
Broadly speaking, ``d.strftime(fmt)`` acts like the :mod:`time` module's
``time.strftime(fmt, d.timetuple())`` although not all objects support a
:meth:`timetuple` method.
For the :meth:`datetime.strptime` class method, the default value is
``1900-01-01T00:00:00.000``: any components not specified in the format string
will be pulled from the default value. [#]_
Using ``datetime.strptime(date_string, format)`` is equivalent to::
datetime(*(time.strptime(date_string, format)[0:6]))
except when the format includes sub-second components or timezone offset
information, which are supported in ``datetime.strptime`` but are discarded by
``time.strptime``.
For :class:`.time` objects, the format codes for year, month, and day should not
be used, as :class:`time` objects have no such values. If they're used anyway,
``1900`` is substituted for the year, and ``1`` for the month and day.
For :class:`date` objects, the format codes for hours, minutes, seconds, and
microseconds should not be used, as :class:`date` objects have no such
values. If they're used anyway, ``0`` is substituted for them.
For the same reason, handling of format strings containing Unicode code points
that can't be represented in the charset of the current locale is also
platform-dependent. On some platforms such code points are preserved intact in
the output, while on others ``strftime`` may raise :exc:`UnicodeError` or return
an empty string instead.
Merged revisions 59407-59422 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59407 | armin.rigo | 2007-12-07 20:19:55 +0100 (Fri, 07 Dec 2007) | 2 lines This is probably what was meant here. ........ r59410 | guido.van.rossum | 2007-12-08 05:38:23 +0100 (Sat, 08 Dec 2007) | 2 lines Be (just a bit :) more specific about release date. ........ r59411 | alexandre.vassalotti | 2007-12-08 05:49:22 +0100 (Sat, 08 Dec 2007) | 3 lines Fix issue #1530. Return an error exit status if not all tests passes. ........ r59413 | georg.brandl | 2007-12-08 11:56:39 +0100 (Sat, 08 Dec 2007) | 2 lines Fix tpyo. ........ r59414 | georg.brandl | 2007-12-08 12:05:05 +0100 (Sat, 08 Dec 2007) | 2 lines Fix markup in whatsnew, use new directive in ACKS. ........ r59415 | georg.brandl | 2007-12-08 12:05:36 +0100 (Sat, 08 Dec 2007) | 2 lines Fix Eren's name. ........ r59416 | georg.brandl | 2007-12-08 12:23:13 +0100 (Sat, 08 Dec 2007) | 2 lines Add examples to the datetime documentation. Written for GHOP by "h4wk.cz". ........ r59417 | skip.montanaro | 2007-12-08 15:37:43 +0100 (Sat, 08 Dec 2007) | 2 lines Note that open() is the preferred way to open files (issue 1510). ........ r59418 | skip.montanaro | 2007-12-08 16:23:31 +0100 (Sat, 08 Dec 2007) | 1 line + "context manager" ........ r59419 | skip.montanaro | 2007-12-08 16:26:16 +0100 (Sat, 08 Dec 2007) | 1 line correct email address ........ r59420 | skip.montanaro | 2007-12-08 16:33:24 +0100 (Sat, 08 Dec 2007) | 3 lines When splitting, avoid making a copy of the string if the split doesn't find anything (issue 1538). ........
2007-12-08 13:28:33 -04:00
Notes:
(1)
Because the format depends on the current locale, care should be taken when
making assumptions about the output value. Field orderings will vary (for
example, "month/day/year" versus "day/month/year"), and the output may
contain non-ASCII characters.
Merged revisions 61239-61249,61252-61257,61260-61264,61269-61275,61278-61279,61285-61286,61288-61290,61298,61303-61305,61312-61314,61317,61329,61332,61344,61350-61351,61363-61376,61378-61379,61382-61383,61387-61388,61392,61395-61396,61402-61403 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r61239 | andrew.kuchling | 2008-03-05 01:44:41 +0100 (Wed, 05 Mar 2008) | 1 line Add more items; add fragmentary notes ........ r61240 | amaury.forgeotdarc | 2008-03-05 02:50:33 +0100 (Wed, 05 Mar 2008) | 13 lines Issue#2238: some syntax errors from *args or **kwargs expressions would give bogus error messages, because of untested exceptions:: >>> f(**g(1=2)) XXX undetected error Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'int' object is not iterable instead of the expected SyntaxError: keyword can't be an expression Will backport. ........ r61241 | neal.norwitz | 2008-03-05 06:10:48 +0100 (Wed, 05 Mar 2008) | 3 lines Remove the files/dirs after closing the DB so the tests work on Windows. Patch from Trent Nelson. Also simplified removing a file by using test_support. ........ r61242 | neal.norwitz | 2008-03-05 06:14:18 +0100 (Wed, 05 Mar 2008) | 3 lines Get this test to pass even when there is no sound card in the system. Patch from Trent Nelson. (I can't test this.) ........ r61243 | neal.norwitz | 2008-03-05 06:20:44 +0100 (Wed, 05 Mar 2008) | 3 lines Catch OSError when trying to remove a file in case removal fails. This should prevent a failure in tearDown masking any real test failure. ........ r61244 | neal.norwitz | 2008-03-05 06:38:06 +0100 (Wed, 05 Mar 2008) | 5 lines Make the timeout longer to give slow machines a chance to pass the test before timing out. This doesn't change the duration of the test under normal circumstances. This is targetted at fixing the spurious failures on the FreeBSD buildbot primarily. ........ r61245 | neal.norwitz | 2008-03-05 06:49:03 +0100 (Wed, 05 Mar 2008) | 1 line Tabs -> spaces ........ r61246 | neal.norwitz | 2008-03-05 06:50:20 +0100 (Wed, 05 Mar 2008) | 1 line Use -u urlfetch to run more tests ........ r61247 | neal.norwitz | 2008-03-05 06:51:20 +0100 (Wed, 05 Mar 2008) | 1 line test_smtplib sometimes reports leaks too, suppress it ........ r61248 | jeffrey.yasskin | 2008-03-05 07:19:56 +0100 (Wed, 05 Mar 2008) | 5 lines Fix test_socketserver on Windows after r61099 added several signal.alarm() calls (which don't exist on non-Unix platforms). Thanks to Trent Nelson for the report and patch. ........ r61249 | georg.brandl | 2008-03-05 08:10:35 +0100 (Wed, 05 Mar 2008) | 2 lines Fix some rst. ........ r61252 | thomas.heller | 2008-03-05 15:53:39 +0100 (Wed, 05 Mar 2008) | 2 lines News entry for yesterdays commit. ........ r61253 | thomas.heller | 2008-03-05 16:34:29 +0100 (Wed, 05 Mar 2008) | 3 lines Issue 1872: Changed the struct module typecode from 't' to '?', for compatibility with PEP3118. ........ r61254 | skip.montanaro | 2008-03-05 17:41:09 +0100 (Wed, 05 Mar 2008) | 4 lines Elaborate on the role of the altinstall target when installing multiple versions. ........ r61255 | georg.brandl | 2008-03-05 20:31:44 +0100 (Wed, 05 Mar 2008) | 2 lines #2239: PYTHONPATH delimiter is os.pathsep. ........ r61256 | raymond.hettinger | 2008-03-05 21:59:58 +0100 (Wed, 05 Mar 2008) | 1 line C implementation of itertools.permutations(). ........ r61257 | raymond.hettinger | 2008-03-05 22:04:32 +0100 (Wed, 05 Mar 2008) | 1 line Small code cleanup. ........ r61260 | martin.v.loewis | 2008-03-05 23:24:31 +0100 (Wed, 05 Mar 2008) | 2 lines cd PCbuild only after deleting all pyc files. ........ r61261 | raymond.hettinger | 2008-03-06 02:15:52 +0100 (Thu, 06 Mar 2008) | 1 line Add examples. ........ r61262 | andrew.kuchling | 2008-03-06 02:36:27 +0100 (Thu, 06 Mar 2008) | 1 line Add two items ........ r61263 | georg.brandl | 2008-03-06 07:47:18 +0100 (Thu, 06 Mar 2008) | 2 lines #1725737: ignore other VC directories other than CVS and SVN's too. ........ r61264 | martin.v.loewis | 2008-03-06 07:55:22 +0100 (Thu, 06 Mar 2008) | 4 lines Patch #2232: os.tmpfile might fail on Windows if the user has no permission to create files in the root directory. Will backport to 2.5. ........ r61269 | georg.brandl | 2008-03-06 08:19:15 +0100 (Thu, 06 Mar 2008) | 2 lines Expand on re.split behavior with captured expressions. ........ r61270 | georg.brandl | 2008-03-06 08:22:09 +0100 (Thu, 06 Mar 2008) | 2 lines Little clarification of assignments. ........ r61271 | georg.brandl | 2008-03-06 08:31:34 +0100 (Thu, 06 Mar 2008) | 2 lines Add isinstance/issubclass to tutorial. ........ r61272 | georg.brandl | 2008-03-06 08:34:52 +0100 (Thu, 06 Mar 2008) | 2 lines Add missing NEWS entry for r61263. ........ r61273 | georg.brandl | 2008-03-06 08:41:16 +0100 (Thu, 06 Mar 2008) | 2 lines #2225: return nonzero status code from py_compile if not all files could be compiled. ........ r61274 | georg.brandl | 2008-03-06 08:43:02 +0100 (Thu, 06 Mar 2008) | 2 lines #2220: handle matching failure more gracefully. ........ r61275 | georg.brandl | 2008-03-06 08:45:52 +0100 (Thu, 06 Mar 2008) | 2 lines Bug #2220: handle rlcompleter attribute match failure more gracefully. ........ r61278 | martin.v.loewis | 2008-03-06 14:49:47 +0100 (Thu, 06 Mar 2008) | 1 line Rely on x64 platform configuration when building _bsddb on AMD64. ........ r61279 | martin.v.loewis | 2008-03-06 14:50:28 +0100 (Thu, 06 Mar 2008) | 1 line Update db-4.4.20 build procedure. ........ r61285 | raymond.hettinger | 2008-03-06 21:52:01 +0100 (Thu, 06 Mar 2008) | 1 line More tests. ........ r61286 | raymond.hettinger | 2008-03-06 23:51:36 +0100 (Thu, 06 Mar 2008) | 1 line Issue 2246: itertools grouper object did not participate in GC (should be backported). ........ r61288 | raymond.hettinger | 2008-03-07 02:33:20 +0100 (Fri, 07 Mar 2008) | 1 line Tweak recipes and tests ........ r61289 | jeffrey.yasskin | 2008-03-07 07:22:15 +0100 (Fri, 07 Mar 2008) | 5 lines Progress on issue #1193577 by adding a polling .shutdown() method to SocketServers. The core of the patch was written by Pedro Werneck, but any bugs are mine. I've also rearranged the code for timeouts in order to avoid interfering with the shutdown poll. ........ r61290 | nick.coghlan | 2008-03-07 15:13:28 +0100 (Fri, 07 Mar 2008) | 1 line Speed up with statements by storing the __exit__ method on the stack instead of in a temp variable (bumps the magic number for pyc files) ........ r61298 | andrew.kuchling | 2008-03-07 22:09:23 +0100 (Fri, 07 Mar 2008) | 1 line Grammar fix ........ r61303 | georg.brandl | 2008-03-08 10:54:06 +0100 (Sat, 08 Mar 2008) | 2 lines #2253: fix continue vs. finally docs. ........ r61304 | marc-andre.lemburg | 2008-03-08 11:01:43 +0100 (Sat, 08 Mar 2008) | 3 lines Add new name for Mandrake: Mandriva. ........ r61305 | georg.brandl | 2008-03-08 11:05:24 +0100 (Sat, 08 Mar 2008) | 2 lines #1533486: fix types in refcount intro. ........ r61312 | facundo.batista | 2008-03-08 17:50:27 +0100 (Sat, 08 Mar 2008) | 5 lines Issue 1106316. post_mortem()'s parameter, traceback, is now optional: it defaults to the traceback of the exception that is currently being handled. ........ r61313 | jeffrey.yasskin | 2008-03-08 19:26:54 +0100 (Sat, 08 Mar 2008) | 2 lines Add tests for with and finally performance to pybench. ........ r61314 | jeffrey.yasskin | 2008-03-08 21:08:21 +0100 (Sat, 08 Mar 2008) | 2 lines Fix pybench for pythons < 2.6, tested back to 2.3. ........ r61317 | jeffrey.yasskin | 2008-03-08 22:35:15 +0100 (Sat, 08 Mar 2008) | 3 lines Well that was dumb. platform.python_implementation returns a function, not a string. ........ r61329 | georg.brandl | 2008-03-09 16:11:39 +0100 (Sun, 09 Mar 2008) | 2 lines #2249: document assertTrue and assertFalse. ........ r61332 | neal.norwitz | 2008-03-09 20:03:42 +0100 (Sun, 09 Mar 2008) | 4 lines Introduce a lock to fix a race condition which caused an exception in the test. Some buildbots were consistently failing (e.g., amd64). Also remove a couple of semi-colons. ........ r61344 | raymond.hettinger | 2008-03-11 01:19:07 +0100 (Tue, 11 Mar 2008) | 1 line Add recipe to docs. ........ r61350 | guido.van.rossum | 2008-03-11 22:18:06 +0100 (Tue, 11 Mar 2008) | 3 lines Fix the overflows in expandtabs(). "This time for sure!" (Exploit at request.) ........ r61351 | raymond.hettinger | 2008-03-11 22:37:46 +0100 (Tue, 11 Mar 2008) | 1 line Improve docs for itemgetter(). Show that it works with slices. ........ r61363 | georg.brandl | 2008-03-13 08:15:56 +0100 (Thu, 13 Mar 2008) | 2 lines #2265: fix example. ........ r61364 | georg.brandl | 2008-03-13 08:17:14 +0100 (Thu, 13 Mar 2008) | 2 lines #2270: fix typo. ........ r61365 | georg.brandl | 2008-03-13 08:21:41 +0100 (Thu, 13 Mar 2008) | 2 lines #1720705: add docs about import/threading interaction, wording by Nick. ........ r61366 | andrew.kuchling | 2008-03-13 12:07:35 +0100 (Thu, 13 Mar 2008) | 1 line Add class decorators ........ r61367 | raymond.hettinger | 2008-03-13 17:43:17 +0100 (Thu, 13 Mar 2008) | 1 line Add 2-to-3 support for the itertools moved to builtins or renamed. ........ r61368 | raymond.hettinger | 2008-03-13 17:43:59 +0100 (Thu, 13 Mar 2008) | 1 line Consistent tense. ........ r61369 | raymond.hettinger | 2008-03-13 20:03:51 +0100 (Thu, 13 Mar 2008) | 1 line Issue 2274: Add heapq.heappushpop(). ........ r61370 | raymond.hettinger | 2008-03-13 20:33:34 +0100 (Thu, 13 Mar 2008) | 1 line Simplify the nlargest() code using heappushpop(). ........ r61371 | brett.cannon | 2008-03-13 21:27:00 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_thread over to unittest. Commits GHOP 237. Thanks Benjamin Peterson for the patch. ........ r61372 | brett.cannon | 2008-03-13 21:33:10 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_tokenize to doctest. Done as GHOP 238 by Josip Dzolonga. ........ r61373 | brett.cannon | 2008-03-13 21:47:41 +0100 (Thu, 13 Mar 2008) | 4 lines Convert test_contains, test_crypt, and test_select to unittest. Patch from GHOP 294 by David Marek. ........ r61374 | brett.cannon | 2008-03-13 22:02:16 +0100 (Thu, 13 Mar 2008) | 4 lines Move test_gdbm to use unittest. Closes issue #1960. Thanks Giampaolo Rodola. ........ r61375 | brett.cannon | 2008-03-13 22:09:28 +0100 (Thu, 13 Mar 2008) | 4 lines Convert test_fcntl to unittest. Closes issue #2055. Thanks Giampaolo Rodola. ........ r61376 | raymond.hettinger | 2008-03-14 06:03:44 +0100 (Fri, 14 Mar 2008) | 1 line Leave heapreplace() unchanged. ........ r61378 | martin.v.loewis | 2008-03-14 14:56:09 +0100 (Fri, 14 Mar 2008) | 2 lines Patch #2284: add -x64 option to rt.bat. ........ r61379 | martin.v.loewis | 2008-03-14 14:57:59 +0100 (Fri, 14 Mar 2008) | 2 lines Use -x64 flag. ........ r61382 | brett.cannon | 2008-03-14 15:03:10 +0100 (Fri, 14 Mar 2008) | 2 lines Remove a bad test. ........ r61383 | mark.dickinson | 2008-03-14 15:23:37 +0100 (Fri, 14 Mar 2008) | 9 lines Issue 705836: Fix struct.pack(">f", 1e40) to behave consistently across platforms: it should now raise OverflowError on all platforms. (Previously it raised OverflowError only on non IEEE 754 platforms.) Also fix the (already existing) test for this behaviour so that it actually raises TestFailed instead of just referencing it. ........ r61387 | thomas.heller | 2008-03-14 22:06:21 +0100 (Fri, 14 Mar 2008) | 1 line Remove unneeded initializer. ........ r61388 | martin.v.loewis | 2008-03-14 22:19:28 +0100 (Fri, 14 Mar 2008) | 2 lines Run debug version, cd to PCbuild. ........ r61392 | georg.brandl | 2008-03-15 00:10:34 +0100 (Sat, 15 Mar 2008) | 2 lines Remove obsolete paragraph. #2288. ........ r61395 | georg.brandl | 2008-03-15 01:20:19 +0100 (Sat, 15 Mar 2008) | 2 lines Fix lots of broken links in the docs, found by Sphinx' external link checker. ........ r61396 | skip.montanaro | 2008-03-15 03:32:49 +0100 (Sat, 15 Mar 2008) | 1 line note that fork and forkpty raise OSError on failure ........ r61402 | skip.montanaro | 2008-03-15 17:04:45 +0100 (Sat, 15 Mar 2008) | 1 line add %f format to datetime - issue 1158 ........ r61403 | skip.montanaro | 2008-03-15 17:07:11 +0100 (Sat, 15 Mar 2008) | 2 lines . ........
2008-03-15 21:07:10 -03:00
(2)
The :meth:`strptime` method can parse years in the full [1, 9999] range, but
years < 1000 must be zero-filled to 4-digit width.
2011-01-10 19:28:33 -04:00
.. versionchanged:: 3.2
In previous versions, :meth:`strftime` method was restricted to
years >= 1900.
.. versionchanged:: 3.3
In version 3.2, :meth:`strftime` method was restricted to
years >= 1000.
(3)
When used with the :meth:`strptime` method, the ``%p`` directive only affects
the output hour field if the ``%I`` directive is used to parse the hour.
(4)
Unlike the :mod:`time` module, the :mod:`datetime` module does not support
leap seconds.
(5)
When used with the :meth:`strptime` method, the ``%f`` directive
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
accepts from one to six digits and zero pads on the right. ``%f`` is
an extension to the set of format characters in the C standard (but
implemented separately in datetime objects, and therefore always
available).
2011-01-10 19:28:33 -04:00
(6)
For a naive object, the ``%z``, ``%:z`` and ``%Z`` format codes are replaced
by empty strings.
For an aware object:
``%z``
:meth:`utcoffset` is transformed into a string of the form
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
``±HHMM[SS[.ffffff]]``, where ``HH`` is a 2-digit string giving the number
of UTC offset hours, ``MM`` is a 2-digit string giving the number of UTC
offset minutes, ``SS`` is a 2-digit string giving the number of UTC offset
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
seconds and ``ffffff`` is a 6-digit string giving the number of UTC
offset microseconds. The ``ffffff`` part is omitted when the offset is a
whole number of seconds and both the ``ffffff`` and the ``SS`` part is
omitted when the offset is a whole number of minutes. For example, if
:meth:`utcoffset` returns ``timedelta(hours=-3, minutes=-30)``, ``%z`` is
replaced with the string ``'-0330'``.
.. versionchanged:: 3.7
The UTC offset is not restricted to a whole number of minutes.
.. versionchanged:: 3.7
When the ``%z`` directive is provided to the :meth:`strptime` method,
the UTC offsets can have a colon as a separator between hours, minutes
and seconds.
For example, ``'+01:00:00'`` will be parsed as an offset of one hour.
In addition, providing ``'Z'`` is identical to ``'+00:00'``.
``%:z``
Behaves exactly as ``%z``, but has a colon separator added between
hours, minutes and seconds.
``%Z``
In :meth:`strftime`, ``%Z`` is replaced by an empty string if
:meth:`tzname` returns ``None``; otherwise ``%Z`` is replaced by the
returned value, which must be a string.
:meth:`strptime` only accepts certain values for ``%Z``:
1. any value in ``time.tzname`` for your machine's locale
2. the hard-coded values ``UTC`` and ``GMT``
So someone living in Japan may have ``JST``, ``UTC``, and ``GMT`` as
valid values, but probably not ``EST``. It will raise ``ValueError`` for
invalid values.
.. versionchanged:: 3.2
When the ``%z`` directive is provided to the :meth:`strptime` method, an
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
aware :class:`.datetime` object will be produced. The ``tzinfo`` of the
result will be set to a :class:`timezone` instance.
(7)
When used with the :meth:`strptime` method, ``%U`` and ``%W`` are only used
in calculations when the day of the week and the calendar year (``%Y``)
are specified.
(8)
Similar to ``%U`` and ``%W``, ``%V`` is only used in calculations when the
day of the week and the ISO year (``%G``) are specified in a
:meth:`strptime` format string. Also note that ``%G`` and ``%Y`` are not
interchangeable.
(9)
When used with the :meth:`strptime` method, the leading zero is optional
for formats ``%d``, ``%m``, ``%H``, ``%I``, ``%M``, ``%S``, ``%j``, ``%U``,
``%W``, and ``%V``. Format ``%y`` does require a leading zero.
.. rubric:: Footnotes
.. [#] If, that is, we ignore the effects of Relativity
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
.. [#] This matches the definition of the "proleptic Gregorian" calendar in
Dershowitz and Reingold's book *Calendrical Calculations*,
where it's the base calendar for all computations. See the book for
algorithms for converting between proleptic Gregorian ordinals and
many other calendar systems.
.. [#] See R. H. van Gent's `guide to the mathematics of the ISO 8601 calendar
<https://web.archive.org/web/20220531051136/https://webspace.science.uu.nl/~gent0113/calendar/isocalendar.htm>`_
Overhaul datetime documentation (GH-13410) This is a restructuring of the datetime documentation to hopefully make them more user-friendly and approachable to new users without losing any of the detail. Changes include: - Creating dedicated subsections for some concepts such as: - "Constants" - "Naive vs Aware" - "Determining if an Object is Aware" - Give 'naive vs aware' its own subsection - Give 'constants' their own subsection - Overhauling the strftime-strptime section by: - Breaking it into logical, linkable, and digestable parts - Adding a high-level comparison table - Moving the technical detail to bottom: readers come to this section primarily to remind themselves to things: - How do I write the format code for X? - strptime/strftime: which one is which again? - Touching up fromisoformat + isoformat sections by: - Revising fromisoformat + isoformat for date, time, and datetime - Adding basic examples - Enforcing consistency about putting formats (i.e. ``HH:MM``) in double backticks. This was previously done in some places but not all - Putting long 'supported formats', on their own line to improve readability - Moving the 'seealso' section to the top and add a link to dateutil Rationale: This doesn't really belong nested under the 'constants' section. Let readers know right away that datetime is one of several related tools. - Moving common features of several types into one place: Previously, each type went out of its way to note separately that it was hashable and picklable. These can be brought into one single place that is more prominent. - Reducing some verbose explanations to improve readability - Breaking up long paragraphs into digestable chunks - Displaying longer "equivalent to" examples, as short code blocks - Using the dot notation for datetime/time classes: Use :class:`.time` and :class:`.datetime` rather than :class:`time` and :class:`datetime`; otherwise, the generated links will route to the respective modules, not classes. - Rewording the tzinfo class description The top paragraph should get straight to the point of telling the reader what subclasses of tzinfo _do_. Previously, that was hidden in a later paragraph. - Adding a note on .today() versus .now() - Rearranging and expanding example blocks, including: - Moved long, multiline inline examples to standalone examples - Simplified the example block for timedelta arithmetic: - Broke the example into two logical sections: 1. normalization/parameter 'merging' 2. timedelta arithmetic - Reduced the complexity of the some of the examples. Show reasonable, real-world uses cases that are easy to follow along with and progres in difficult slightly. - Broke up the example sections for date and datetime sections by putting the easy examples first, progressing to more esoteric situations and breaking it up into logical sections based on what the methods are doing at a high level. - Simplified the KabulTz example: - Put the class definition itself into a non-REPL block since there is no interactive output involved there - Briefly explained what's happening before launching into the code - Broke the example section into visually separate chunks - Various whitespace, formatting, style and grammar fixes including: - Consistently using backctics for 'date_string' formats - Consistently using one space after periods. - Consistently using bold for vocab terms - Consistently using italics when referring to params: See https://devguide.python.org/documenting/#id4 - Using '::' to lead into code blocks Per https://devguide.python.org/documenting/#source-code, this will let the reader use the 'expand/collapse' top-right button for REPL blocks to hide or show the prompt. - Using consistent captialization schemes - Removing use of the default role - Put 'example' blocks in Markdown subsections This is a combination of 66 commits. See bpo-36960: https://bugs.python.org/issue36960
2019-09-11 06:19:05 -03:00
for a good explanation.
.. [#] Passing ``datetime.strptime('Feb 29', '%b %d')`` will fail since ``1900`` is not a leap year.