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Code Issues Releases Wiki Activity

Add 2 items; record ideas for two initial sections; clarify wording

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Andrew M. Kuchling 2010-05-06 17:21:59 +00:00
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Doc/whatsnew/2.7.rst
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@ -9,6 +9,9 @@
.. Fix accents on Kristjan Valur Jonsson, Fuerstenau .. Fix accents on Kristjan Valur Jonsson, Fuerstenau
.. Big jobs: pep 391 .. Big jobs: pep 391
.. Initial section: development plans for 2.x in future
.. Initial section: changes in deprecation warning behaviour
.. hyperlink all the methods & functions. .. hyperlink all the methods & functions.
.. T_STRING_INPLACE not described in main docs .. T_STRING_INPLACE not described in main docs
@ -56,7 +59,7 @@
when researching a change. when researching a change.
This article explains the new features in Python 2.7. The final This article explains the new features in Python 2.7. The final
release of 2.7 is currently scheduled for June 2010; the detailed release of 2.7 is currently scheduled for July 2010; the detailed
schedule is described in :pep:`373`. schedule is described in :pep:`373`.
Python 2.7 is planned to be the last major release in the 2.x series. Python 2.7 is planned to be the last major release in the 2.x series.
@ -80,7 +83,7 @@ for migrating to the 3.x series.
A partial list of 3.1 features that were backported to 2.7: A partial list of 3.1 features that were backported to 2.7:
* A version of the :mod:`io` library, rewritten in C for performance. * A new version of the :mod:`io` library, rewritten in C for performance.
* The ordered-dictionary type described in :ref:`pep-0372`. * The ordered-dictionary type described in :ref:`pep-0372`.
* The new format specifier described in :ref:`pep-0378`. * The new format specifier described in :ref:`pep-0378`.
* The :class:`memoryview` object. * The :class:`memoryview` object.
@ -1176,6 +1179,12 @@ changes, or look through the Subversion logs for all the details.
with any object literal that decodes to a list of pairs. with any object literal that decodes to a list of pairs.
(Contributed by Raymond Hettinger; :issue:`5381`.) (Contributed by Raymond Hettinger; :issue:`5381`.)
* The :mod:`mailbox` module's :class:`Maildir` class now records the
timestamp on the directories it reads, and only re-reads them if the
modification time has subsequently changed. This improves
performance by avoiding unneeded directory scans. (Fixed by
A.M. Kuchling and Antoine Pitrou; :issue:`1607951`, :issue:`6896`.)
* New functions: the :mod:`math` module gained * New functions: the :mod:`math` module gained
:func:`~math.erf` and :func:`~math.erfc` for the error function and the complementary error function, :func:`~math.erf` and :func:`~math.erfc` for the error function and the complementary error function,
:func:`~math.expm1` which computes ``e**x - 1`` with more precision than :func:`~math.expm1` which computes ``e**x - 1`` with more precision than
@ -1238,9 +1247,9 @@ changes, or look through the Subversion logs for all the details.
expected that the directory or zip contains a :file:`__main__.py`; expected that the directory or zip contains a :file:`__main__.py`;
if it doesn't, some other :file:`__main__.py` might be imported from if it doesn't, some other :file:`__main__.py` might be imported from
a location later in ``sys.path``. This makes some of the machinery a location later in ``sys.path``. This makes some of the machinery
of :mod:`runpy` available to scripts that want to mimic the behaviour of :mod:`runpy` available to scripts that want to mimic the way
of Python's :option:`-m` switch. (Added by Nick Coghlan; Python's :option:`-m` processes an explicit path name.
:issue:`6816`.) (Added by Nick Coghlan; :issue:`6816`.)
* New function: in the :mod:`shutil` module, :func:`~shutil.make_archive` * New function: in the :mod:`shutil` module, :func:`~shutil.make_archive`
takes a filename, archive type (zip or tar-format), and a directory takes a filename, archive type (zip or tar-format), and a directory
@ -2092,6 +2101,12 @@ that may require changes to your code:
affects new-style classes (derived from :class:`object`) and C extension affects new-style classes (derived from :class:`object`) and C extension
types. (:issue:`6101`.) types. (:issue:`6101`.)
* Due to a bug in Python 2.6, the *exc_value* parameter to
:meth:`__exit__` methods was often the string representation of the
exception, not an instance. This was fixed in 2.7, so *exc_value*
will be an instance as expected. (Fixed by Florent Xicluna;
:issue:`7853`.)
* When a restricted set of attributes were set using ``__slots__``, * When a restricted set of attributes were set using ``__slots__``,
deleting an unset attribute would not raise :exc:`AttributeError` deleting an unset attribute would not raise :exc:`AttributeError`
as you would expect. Fixed by Benjamin Peterson; :issue:`7604`.) as you would expect. Fixed by Benjamin Peterson; :issue:`7604`.)