Python 3.10.0a3

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Pablo Galindo 2020-12-07 19:33:00 +00:00
parent c0afb7fa0e
commit 8bae2a958e
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148 changed files with 1573 additions and 372 deletions

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@ -20,10 +20,10 @@
#define PY_MINOR_VERSION 10
#define PY_MICRO_VERSION 0
#define PY_RELEASE_LEVEL PY_RELEASE_LEVEL_ALPHA
#define PY_RELEASE_SERIAL 2
#define PY_RELEASE_SERIAL 3
/* Version as a string */
#define PY_VERSION "3.10.0a2+"
#define PY_VERSION "3.10.0a3"
/*--end constants--*/
/* Version as a single 4-byte hex number, e.g. 0x010502B2 == 1.5.2b2.

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@ -1,5 +1,5 @@
# -*- coding: utf-8 -*-
# Autogenerated by Sphinx on Tue Nov 3 00:01:01 2020
# Autogenerated by Sphinx on Mon Dec 7 19:34:00 2020
topics = {'assert': 'The "assert" statement\n'
'**********************\n'
'\n'
@ -5301,24 +5301,23 @@ topics = {'assert': 'The "assert" statement\n'
'for the\n'
'conversion. The alternate form is defined differently for '
'different\n'
'types. This option is only valid for integer, float, '
'complex and\n'
'Decimal types. For integers, when binary, octal, or '
'hexadecimal output\n'
'is used, this option adds the prefix respective "\'0b\'", '
'"\'0o\'", or\n'
'"\'0x\'" to the output value. For floats, complex and '
'Decimal the\n'
'alternate form causes the result of the conversion to '
'always contain a\n'
'decimal-point character, even if no digits follow it. '
'Normally, a\n'
'decimal-point character appears in the result of these '
'conversions\n'
'only if a digit follows it. In addition, for "\'g\'" and '
'"\'G\'"\n'
'conversions, trailing zeros are not removed from the '
'result.\n'
'types. This option is only valid for integer, float and '
'complex\n'
'types. For integers, when binary, octal, or hexadecimal '
'output is\n'
'used, this option adds the prefix respective "\'0b\'", '
'"\'0o\'", or "\'0x\'"\n'
'to the output value. For float and complex the alternate '
'form causes\n'
'the result of the conversion to always contain a '
'decimal-point\n'
'character, even if no digits follow it. Normally, a '
'decimal-point\n'
'character appears in the result of these conversions only '
'if a digit\n'
'follows it. In addition, for "\'g\'" and "\'G\'" '
'conversions, trailing\n'
'zeros are not removed from the result.\n'
'\n'
'The "\',\'" option signals the use of a comma for a '
'thousands separator.\n'
@ -5456,9 +5455,8 @@ topics = {'assert': 'The "assert" statement\n'
'the integer\n'
'to a floating point number before formatting.\n'
'\n'
'The available presentation types for floating point and '
'decimal values\n'
'are:\n'
'The available presentation types for "float" and "Decimal" '
'values are:\n'
'\n'
' '
'+-----------+------------------------------------------------------------+\n'
@ -5467,24 +5465,50 @@ topics = {'assert': 'The "assert" statement\n'
'|\n'
' '
'|===========|============================================================|\n'
' | "\'e\'" | Exponent notation. Prints the number in '
'scientific |\n'
' | | notation using the letter e to indicate '
'the exponent. |\n'
' | | The default precision is '
'"6". |\n'
' | "\'e\'" | Scientific notation. For a given '
'precision "p", formats |\n'
' | | the number in scientific notation with the '
'letter e |\n'
' | | separating the coefficient from the '
'exponent. The |\n'
' | | coefficient has one digit before and "p" '
'digits after the |\n'
' | | decimal point, for a total of "p + 1" '
'significant digits. |\n'
' | | With no precision given, uses a precision '
'of "6" digits |\n'
' | | after the decimal point for "float", and '
'shows all |\n'
' | | coefficient digits for "Decimal". If no '
'digits follow the |\n'
' | | decimal point, the decimal point is also '
'removed unless |\n'
' | | the "#" option is '
'used. |\n'
' '
'+-----------+------------------------------------------------------------+\n'
' | "\'E\'" | Exponent notation. Same as "\'e\'" '
'except it uses an upper |\n'
' | "\'E\'" | Scientific notation. Same as "\'e\'" '
'except it uses an upper |\n'
' | | case E as the separator '
'character. |\n'
' '
'+-----------+------------------------------------------------------------+\n'
' | "\'f\'" | Fixed-point notation. Displays the '
'number as a fixed-point |\n'
' | | number. The default precision is '
'"6". |\n'
' | "\'f\'" | Fixed-point notation. For a given '
'precision "p", formats |\n'
' | | the number as a decimal number with '
'exactly "p" digits |\n'
' | | following the decimal point. With no '
'precision given, uses |\n'
' | | a precision of "6" digits after the '
'decimal point for |\n'
' | | "float", and uses a precision large enough '
'to show all |\n'
' | | coefficient digits for "Decimal". If no '
'digits follow the |\n'
' | | decimal point, the decimal point is also '
'removed unless |\n'
' | | the "#" option is '
'used. |\n'
' '
'+-----------+------------------------------------------------------------+\n'
' | "\'F\'" | Fixed-point notation. Same as "\'f\'", '
@ -5530,9 +5554,14 @@ topics = {'assert': 'The "assert" statement\n'
' | | regardless of the precision. A precision '
'of "0" is |\n'
' | | treated as equivalent to a precision of '
'"1". The default |\n'
' | | precision is '
'"6". |\n'
'"1". With no |\n'
' | | precision given, uses a precision of "6" '
'significant |\n'
' | | digits for "float", and shows all '
'coefficient digits for |\n'
' | | '
'"Decimal". '
'|\n'
' '
'+-----------+------------------------------------------------------------+\n'
' | "\'G\'" | General format. Same as "\'g\'" except '

1504
Misc/NEWS.d/3.10.0a3.rst Normal file

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Addressed three compiler warnings found by undefined behavior sanitizer
(ubsan).

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Support was removed for AIX 5.3 and below. See :issue:`40680`.

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It is no longer possible to build the ``_ctypes`` extension module without
:c:type:`wchar_t` type: remove ``CTYPES_UNICODE`` macro. Anyway, the
:c:type:`wchar_t` type is required to build Python. Patch by Victor Stinner.

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Fix building ``pycore_bitutils.h`` internal header on old clang version
without ``__builtin_bswap16()`` (ex: Xcode 4.6.3 on Mac OS X 10.7). Patch by
Joshua Root and Victor Stinner.

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@ -1,4 +0,0 @@
Fix a race condition in "make regen-all" when make -jN option is used to run
jobs in parallel. The clinic.py script now only use atomic write to write
files. Moveover, generated files are now left unchanged if the content does not
change, to not change the file modification time.

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@ -1 +0,0 @@
remove libnet dependency from detect_socket() for VxWorks

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:c:func:`PyList_SET_ITEM`, :c:func:`PyTuple_SET_ITEM` and :c:func:`PyCell_SET`
macros can no longer be used as l-value or r-value. For example,
``x = PyList_SET_ITEM(a, b, c)`` and ``PyList_SET_ITEM(a, b, c) = x`` now fail
with a compiler error. It prevents bugs like
``if (PyList_SET_ITEM (a, b, c) < 0) ...`` test.
Patch by Zackery Spytz and Victor Stinner.

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:c:func:`PyType_GetSlot()` can now accept static types.

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Add dedicated entry to PyAsyncMethods for sending values

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The :c:data:`METH_FASTCALL` calling convention is added to the limited API.
The functions :c:func:`PyModule_AddType`, :c:func:`PyType_FromModuleAndSpec`,
:c:func:`PyType_GetModule` and :c:func:`PyType_GetModuleState` are added to
the limited API on Windows.

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@ -1,3 +0,0 @@
Added :c:func:`PyModule_AddObjectRef` function: similar to
:c:func:`PyModule_AddObject` but don't steal a reference to the value on
success. Patch by Victor Stinner.

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The :c:func:`PyType_FromModuleAndSpec` function now accepts NULL ``tp_doc``
slot.

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When :c:func:`Py_Initialize` is called twice, the second call now updates
more :mod:`sys` attributes for the configuration, rather than only
:data:`sys.argv`. Patch by Victor Stinner.

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Added :c:func:`Py_NewRef` and :c:func:`Py_XNewRef` functions to increment the
reference count of an object and return the object. Patch by Victor Stinner.

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@ -1,5 +0,0 @@
The :c:func:`PyConfig_Read` function now only parses :c:member:`PyConfig.argv`
arguments once: :c:member:`PyConfig.parse_argv` is set to ``2`` after arguments
are parsed. Since Python arguments are strippped from
:c:member:`PyConfig.argv`, parsing arguments twice would parse the application
options as Python options.

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:c:func:`Py_GetPath`, :c:func:`Py_GetPrefix`, :c:func:`Py_GetExecPrefix`,
:c:func:`Py_GetProgramFullPath`, :c:func:`Py_GetPythonHome` and
:c:func:`Py_GetProgramName` functions now return ``NULL`` if called before
:c:func:`Py_Initialize` (before Python is initialized). Use the new
:ref:`Python Initialization Configuration API <init-config>` to get the
:ref:`Python Path Configuration. <init-path-config>`. Patch by Victor
Stinner.

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The ``Py_TRASHCAN_BEGIN`` macro no longer accesses PyTypeObject attributes,
but now can get the condition by calling the new private
:c:func:`_PyTrash_cond()` function which hides implementation details.

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@ -1,3 +0,0 @@
Removed the undocumented ``PyOS_InitInterrupts()`` function. Initializing
Python already implicitly installs signal handlers: see
:c:member:`PyConfig.install_signal_handlers`. Patch by Victor Stinner.

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@ -1 +0,0 @@
Port _hashlib extension module to multiphase initialization (:pep:`489`)

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@ -1 +0,0 @@
Port _random extension module to multiphase initialization (:pep:`489`)

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@ -1,2 +0,0 @@
Port :mod:`grp` and :mod:`pwd` extension modules to multiphase
initialization (:pep:`489`)

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@ -1,2 +0,0 @@
Port :mod:`symtable` extension module to multiphase initialization
(:pep:`489`)

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@ -1,4 +0,0 @@
Convert :c:func:`Py_TYPE` and :c:func:`Py_SIZE` back to macros to allow
using them as an l-value. Many third party C extension modules rely on the
ability of using Py_TYPE() and Py_SIZE() to set an object type and size:
``Py_TYPE(obj) = type;`` and ``Py_SIZE(obj) = size;``.

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@ -1 +0,0 @@
Port _queue extension module to multiphase initialization (:pep:`489`)

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@ -1 +0,0 @@
Port :mod:`gc` extension module to multiphase initialization (:pep:`489`)

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@ -1 +0,0 @@
Port :mod:`spwd` extension module to multiphase initialization (:pep:`489`)

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@ -1 +0,0 @@
Port _struct extension module to multiphase initialization (:pep:`489`)

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@ -1 +0,0 @@
Port _posixshmem extension module to multiphase initialization (:pep:`489`)

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@ -1,2 +0,0 @@
Port _posixsubprocess extension module to multiphase initialization
(:pep:`489`).

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@ -1,2 +0,0 @@
Port :mod:`select` extension module to multiphase initialization
(:pep:`489`).

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@ -1,3 +0,0 @@
The :c:func:`PyType_FromSpecWithBases` and
:c:func:`PyType_FromModuleAndSpec` functions now accept a single class as
the *bases* argument.

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@ -1,2 +0,0 @@
The import system triggers a `ImportWarning` when it falls back to using
`load_module()`.

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@ -1,5 +0,0 @@
Allow ``GenericAlias`` objects to use :ref:`union type expressions <types-union>`.
This allows expressions like ``list[int] | dict[float, str]`` where previously a
``TypeError`` would have been thrown. This also fixes union type expressions
not de-duplicating ``GenericAlias`` objects. (Contributed by Ken Jin in
:issue:`42233`.)

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@ -1 +0,0 @@
Convert :mod:`mmap` to use heap types.

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@ -1,2 +0,0 @@
Improved accuracy of line tracing events and f_lineno attribute of Frame
objects. See PEP 626 for details.

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@ -1 +0,0 @@
Convert :mod:`queue` to use heap types.

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@ -1,3 +0,0 @@
Fixed a bug with the LOAD_ATTR opcode cache that was not respecting
monkey-patching a class-level attribute to make it a descriptor. Patch by
Pablo Galindo.

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@ -1,3 +0,0 @@
Optimise constant subexpressions that appear as part of named expressions
(previously the AST optimiser did not descend into named expressions).
Patch by Nick Coghlan.

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@ -1 +0,0 @@
:class:`types.GenericAlias` objects can now be the targets of weakrefs.

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@ -1,4 +0,0 @@
On Windows, fix a regression in signal handling which prevented to interrupt
a program using CTRL+C. The signal handler can be run in a thread different
than the Python thread, in which case the test deciding if the thread can
handle signals is wrong.

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@ -1 +0,0 @@
Make sure that the compiler front-end produces a well-formed control flow graph. Be be more aggressive in the compiler back-end, as it is now safe to do so.

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@ -1 +0,0 @@
Allow an unparenthesized walrus in subscript indexes.

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@ -1,2 +0,0 @@
Fix a regression introduced by the new parser, where an unparenthesized walrus operator
was not allowed within generator expressions.

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@ -1,2 +0,0 @@
Change function parameters annotations internal representation to tuple
of strings. Patch provided by Yurii Karabas.

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@ -1,2 +0,0 @@
Allow assignment expressions in set literals and set comprehensions as per
PEP 572. Patch by Pablo Galindo.

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@ -1,4 +0,0 @@
On Windows, the ``SIGINT`` event, ``_PyOS_SigintEvent()``, is now created
even if Python is configured to not install signal handlers (if
:c:member:`PyConfig.install_signal_handlers` equals to 0, or
``Py_InitializeEx(0)``).

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Port the ``_warnings`` extension module to the multi-phase initialization
API (:pep:`489`). Patch by Victor Stinner.

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@ -1,2 +0,0 @@
Speed up comparison of bytes objects with non-bytes objects when option :option:`-b`
is specified. Speed up comparison of bytarray objects with non-buffer object.

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PEP 626: After a return, the f_lineno attribute of a frame is always the
last line executed.

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Improve handling of exceptions near recursion limit. Converts a number of
Fatal Errors in RecursionErrors.

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@ -1,26 +0,0 @@
Several built-in and standard library types now ensure that their internal
result tuples are always tracked by the :term:`garbage collector
<garbage collection>`:
- :meth:`collections.OrderedDict.items() <collections.OrderedDict>`
- :meth:`dict.items`
- :func:`enumerate`
- :func:`functools.reduce`
- :func:`itertools.combinations`
- :func:`itertools.combinations_with_replacement`
- :func:`itertools.permutations`
- :func:`itertools.product`
- :func:`itertools.zip_longest`
- :func:`zip`
Previously, they could have become untracked by a prior garbage collection.
Patch by Brandt Bucher.

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@ -1,4 +0,0 @@
``types.GenericAlias`` will now raise a ``TypeError`` when attempting to
initialize with a keyword argument. Previously, this would cause the
interpreter to crash if the interpreter was compiled with debug symbols.
This does not affect interpreters compiled for release. Patch by Ken Jin.

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@ -1,2 +0,0 @@
Language and version switchers, previously maintained in every cpython
branches, are now handled by docsbuild-script.

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@ -1 +0,0 @@
Fix the URL for the IMAP protocol documents.

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@ -1,2 +0,0 @@
Tentative to deprecate ``make suspicious`` by first removing it from the CI
and documentation builds, but keeping it around for manual uses.

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@ -1 +0,0 @@
Get docstrings for IDLE calltips more often by using inspect.getdoc.

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@ -1 +0,0 @@
Fix reporting offset of the RE error in searchengine.

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@ -1,3 +0,0 @@
Keep IDLE running on macOS. Remove obsolete workaround that prevented
running files with shortcuts when using new universal2 installers built
on macOS 11.

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@ -1 +0,0 @@
Add slice support to :attr:`pathlib.PurePath.parents`.

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@ -1,2 +0,0 @@
Add an ``is_async`` identifier to :mod:`pyclbr`'s ``Function`` objects.
Patch by Batuhan Taskaya

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@ -1 +0,0 @@
Fix time-of-check/time-of-action issue in subprocess.Popen.send_signal.

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@ -1 +0,0 @@
Add AsyncContextDecorator to contextlib to support async context manager as a decorator.

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@ -1,2 +0,0 @@
Add func:`os.eventfd` to provide a low level interface for Linux's event
notification file descriptor.

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@ -1,2 +0,0 @@
:mod:`urllib.request` and :mod:`http.client` now send ``http/1.1`` ALPN
extension during TLS handshake when no custom context is supplied.

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@ -1,4 +0,0 @@
Extracting a symlink from a tarball should succeed and overwrite the symlink
if it already exists. The fix is to remove the existing file or symlink
before extraction. Based on patch by Chris AtLee, Jeffrey Kintscher, and
Senthil Kumaran.

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@ -1,2 +0,0 @@
Added missing connect_accepted_socket() method to
``asyncio.AbstractEventLoop``.

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:attr:`pathlib.PurePath.parents` now supports negative indexing. Patch contributed by Yaroslav Pankovych.

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Add async context manager support for contextlib.nullcontext.

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@ -1,2 +0,0 @@
Clarify the error message for :exc:`asyncio.IncompleteReadError` when
``expected`` is ``None``.

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@ -1,2 +0,0 @@
Expose the :c:func:`splice` as :func:`os.splice` in the :mod:`os` module.
Patch by Pablo Galindo

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Fix :meth:`pprint.PrettyPrinter.format` overrides being ignored for contents of small containers. The :func:`pprint._safe_repr` function was removed.

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Added support for the XPath ``!=`` operator in xml.etree

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@ -1,2 +0,0 @@
Convert :mod:`sqlite3` to use heap types (PEP 384).
Patch by Erlend E. Aasland.

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@ -1 +0,0 @@
Enum: fix regression involving inheriting a multiply-inherited enum

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@ -1,4 +0,0 @@
The :func:`traceback.format_exception`,
:func:`traceback.format_exception_only`, and
:func:`traceback.print_exception` functions can now take an exception object
as a positional-only argument.

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@ -1,5 +0,0 @@
Windows: Change ``sysconfig.get_config_var('EXT_SUFFIX')`` to the expected
full ``platform_tag.extension`` format. Previously it was hard-coded to
``.pyd``, now it is compatible with ``distutils.sysconfig`` and will result
in something like ``.cp38-win_amd64.pyd``. This brings windows into
conformance with the other platforms.

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@ -1,2 +0,0 @@
The `load_module()` methods found in importlib now trigger a
DeprecationWarning.

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@ -1,2 +0,0 @@
Update various modules in the stdlib to fall back on `__spec__.loader` when
`__loader__` isn't defined on a module.

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@ -1 +0,0 @@
Improve asyncio.wait function to create the futures set just one time.

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@ -1,4 +0,0 @@
Fix a stack overflow error for asyncio Task or Future repr().
The overflow occurs under some circumstances when a Task or Future
recursively returns itself.

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@ -1 +0,0 @@
webbrowser: Ignore *NotADirectoryError* when calling ``xdg-settings``.

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@ -1,3 +0,0 @@
On Unix, the :func:`os.device_encoding` function now returns ``'UTF-8'`` rather
than the device encoding if the :ref:`Python UTF-8 Mode <utf8-mode>` is
enabled.

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@ -1 +0,0 @@
Fixed writing binary Plist files larger than 4 GiB.

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@ -1,3 +0,0 @@
Added :func:`threading.gettrace` and :func:`threading.getprofile` to
retrieve the functions set by :func:`threading.settrace` and
:func:`threading.setprofile` respectively. Patch by Mario Corchero.

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@ -1,3 +0,0 @@
``sqlite3.OptimizedUnicode`` has been undocumented and obsolete since Python
3.3, when it was made an alias to :class:`str`. It is now deprecated,
scheduled for removal in Python 3.12.

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@ -1,2 +0,0 @@
Mock objects which are not unsafe will now raise an AttributeError if an attribute with the prefix asert, aseert,
or assrt is accessed, in addition to this already happening for the prefixes assert or assret.

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@ -1,5 +0,0 @@
Implement PEP 451/spec methods on zipimport.zipimporter: find_spec(),
create_module(), and exec_module().
This also allows for the documented deprecation of find_loader(),
find_module(), and load_module().

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@ -1,3 +0,0 @@
Add :data:`threading.__excepthook__` to allow retrieving the original value
of :func:`threading.excepthook` in case it is set to a broken or a different
value. Patch by Mario Corchero.

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@ -1 +0,0 @@
Fix `os.sendfile()` on illumos.

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The ``onerror`` callback from ``shutil.rmtree`` now receives correct function when ``os.open`` fails.

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@ -1 +0,0 @@
Port _ssl extension module to heap types.

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@ -1,3 +0,0 @@
Fix the :class:`threading.Thread` class at fork: do nothing if the thread is
already stopped (ex: fork called at Python exit). Previously, an error was
logged in the child process.

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@ -1 +0,0 @@
Fixed support of non-BMP characters in :mod:`tkinter` on macOS.

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@ -1,5 +0,0 @@
:func:`time.perf_counter()` on Windows and :func:`time.monotonic()` on macOS
are now system-wide. Previously, they used an offset computed at startup to
reduce the precision loss caused by the float type. Use
:func:`time.perf_counter_ns()` and :func:`time.monotonic_ns()` added in Python
3.7 to avoid this precision loss.

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@ -1,2 +0,0 @@
Fix various issues with ``typing.Literal`` parameter handling (flatten,
deduplicate, use type to cache key). Patch provided by Yurii Karabas.

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@ -1,4 +0,0 @@
Fixed :meth:`tkinter.ttk.Style.map`. The function accepts now the
representation of the default state as empty sequence (as returned by
``Style.map()``). The structure of the result is now the same on all platform
and does not depend on the value of ``wantobjects``.

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:func:`time.time()`, :func:`time.perf_counter()` and
:func:`time.monotonic()` functions can no longer fail with a Python fatal
error, instead raise a regular Python exception on failure.

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