cpython/Misc/NEWS.d/3.12.0b1.rst

.. date: 2023-05-02-17-56-32
.. gh-issue: 99889
.. nonce: l664SU
.. release date: 2023-05-22
.. section: Security

Fixed a security in flaw in :func:`!uu.decode` that could allow for directory
traversal based on the input if no ``out_file`` was specified.

..

.. date: 2023-05-01-15-03-25
.. gh-issue: 104049
.. nonce: b01Y3g
.. section: Security

Do not expose the local on-disk location in directory indexes produced by
:class:`http.client.SimpleHTTPRequestHandler`.

..

.. date: 2023-04-17-14-38-12
.. gh-issue: 99108
.. nonce: 720lG8
.. section: Security

Upgrade built-in :mod:`hashlib` SHA3 implementation to a verified
implementation from the ``HACL*`` project.  Used when OpenSSL is not present
or lacks SHA3.

..

.. date: 2023-03-07-20-59-17
.. gh-issue: 102153
.. nonce: 14CLSZ
.. section: Security

:func:`urllib.parse.urlsplit` now strips leading C0 control and space
characters following the specification for URLs defined by WHATWG in
response to :cve:`2023-24329`. Patch by Illia Volochii.

..

.. date: 2023-05-20-23-08-48
.. gh-issue: 102856
.. nonce: Knv9WT
.. section: Core and Builtins

Implement PEP 701 changes in the :mod:`tokenize` module. Patch by Marta
Gómez Macías and Pablo Galindo Salgado

..

.. date: 2023-05-18-13-00-21
.. gh-issue: 104615
.. nonce: h_rtw2
.. section: Core and Builtins

Fix wrong ordering of assignments in code like ``a, a = x, y``. Contributed
by Carl Meyer.

..

.. date: 2023-05-16-19-17-48
.. gh-issue: 104572
.. nonce: eBZQYS
.. section: Core and Builtins

Improve syntax error message for invalid constructs in :pep:`695` contexts
and in annotations when ``from __future__ import annotations`` is active.

..

.. date: 2023-05-14-18-56-54
.. gh-issue: 104482
.. nonce: yaQsv8
.. section: Core and Builtins

Fix three error handling bugs in ast.c's validation of pattern matching
statements.

..

.. date: 2023-05-12-13-30-04
.. gh-issue: 102818
.. nonce: rnv1mH
.. section: Core and Builtins

Do not add a frame to the traceback in the ``sys.setprofile`` and
``sys.settrace`` trampoline functions. This ensures that frames are not
duplicated if an exception is raised in the callback function, and ensures
that frames are not omitted if a C callback is used and that does not add
the frame.

..

.. date: 2023-05-11-15-56-07
.. gh-issue: 104405
.. nonce: tXV5fn
.. section: Core and Builtins

Fix an issue where some :term:`bytecode` instructions could ignore
:pep:`523` when "inlining" calls.

..

.. date: 2023-05-10-20-52-29
.. gh-issue: 103082
.. nonce: y3LG5Q
.. section: Core and Builtins

Change behavior of ``sys.monitoring.events.LINE`` events in
``sys.monitoring``: Line events now occur when a new line is reached
dynamically, instead of using a static approximation, as before. This makes
the behavior very similar to that of "line" events in ``sys.settrace``. This
should ease porting of tools from 3.11 to 3.12.

..

.. date: 2023-05-08-10-34-55
.. gh-issue: 104263
.. nonce: ctHWI8
.. section: Core and Builtins

Fix ``float("nan")`` to produce a quiet NaN on platforms (like MIPS) where
the meaning of the signalling / quiet bit is inverted from its usual
meaning. Also introduce a new macro ``Py_INFINITY`` matching C99's
``INFINITY``, and refactor internals to rely on C99's ``NAN`` and
``INFINITY`` macros instead of hard-coding bit patterns for infinities and
NaNs. Thanks Sebastian Berg.

..

.. date: 2023-05-05-13-18-56
.. gh-issue: 99113
.. nonce: hT1ajK
.. section: Core and Builtins

Multi-phase init extension modules may now indicate that they support
running in subinterpreters that have their own GIL.  This is done by using
``Py_MOD_PER_INTERPRETER_GIL_SUPPORTED`` as the value for the
``Py_mod_multiple_interpreters`` module def slot.  Otherwise the module, by
default, cannot be imported in such subinterpreters.  (This does not affect
the main interpreter or subinterpreters that do not have their own GIL.)  In
addition to the isolation that multi-phase init already normally requires,
support for per-interpreter GIL involves one additional constraint:
thread-safety.  If the module has external (linked) dependencies and those
libraries have any state that isn't thread-safe then the module must do the
additional work to add thread-safety.  This should be an uncommon case.

..

.. date: 2023-05-05-12-14-47
.. gh-issue: 99113
.. nonce: -RAdnv
.. section: Core and Builtins

The GIL is now (optionally) per-interpreter.  This is the fundamental change
for PEP 684.  This is all made possible by virtue of the isolated state of
each interpreter in the process.  The behavior of the main interpreter
remains unchanged.  Likewise, interpreters created using
``Py_NewInterpreter()`` are not affected.  To get an interpreter with its
own GIL, call ``Py_NewInterpreterFromConfig()``.

..

.. date: 2023-05-03-17-46-47
.. gh-issue: 104108
.. nonce: GOxAYt
.. section: Core and Builtins

Multi-phase init extension modules may now indicate whether or not they
actually support multiple interpreters.  By default such modules are
expected to support use in multiple interpreters.  In the uncommon case that
one does not, it may use the new ``Py_mod_multiple_interpreters`` module def
slot.  A value of ``0`` means the module does not support them. ``1`` means
it does.  The default is ``1``.

..

.. date: 2023-05-02-18-29-49
.. gh-issue: 104142
.. nonce: _5Et6I
.. section: Core and Builtins

Fix an issue where :class:`list` or :class:`tuple` repetition could fail to
respect :pep:`683`.

..

.. date: 2023-05-01-21-05-47
.. gh-issue: 104078
.. nonce: vRaBsU
.. section: Core and Builtins

Improve the performance of :c:func:`PyObject_HasAttrString`

..

.. date: 2023-05-01-14-48-29
.. gh-issue: 104066
.. nonce: pzoUZQ
.. section: Core and Builtins

Improve the performance of :func:`hasattr` for module objects with a missing
attribute.

..

.. date: 2023-05-01-14-10-38
.. gh-issue: 104028
.. nonce: dxfh13
.. section: Core and Builtins

Reduce object creation while calling callback function from gc. Patch by
Donghee Na.

..

.. date: 2023-05-01-12-03-52
.. gh-issue: 104018
.. nonce: PFxGS4
.. section: Core and Builtins

Disallow the "z" format specifier in %-format of bytes objects.

..

.. date: 2023-05-01-08-08-05
.. gh-issue: 102213
.. nonce: nfH-4C
.. section: Core and Builtins

Fix performance loss when accessing an object's attributes with
``__getattr__``  defined.

..

.. date: 2023-04-26-17-56-18
.. gh-issue: 103895
.. nonce: ESB6tn
.. section: Core and Builtins

Improve handling of edge cases in showing ``Exception.__notes__``. Ensures
that the messages always end with a newline and that string/bytes are not
exploded over multiple lines. Patch by Carey Metcalfe.

..

.. date: 2023-04-26-16-26-35
.. gh-issue: 103907
.. nonce: kiONZQ
.. section: Core and Builtins

Don't modify the refcounts of known immortal objects (:const:`True`,
:const:`False`, and :const:`None`) in the main interpreter loop.

..

.. date: 2023-04-26-15-14-23
.. gh-issue: 103899
.. nonce: 1pqKPF
.. section: Core and Builtins

Provide a helpful hint in the :exc:`TypeError` message when accidentally
calling a :term:`module` object that has a callable attribute of the same
name (such as :func:`dis.dis` or :class:`datetime.datetime`).

..

.. date: 2023-04-25-20-56-01
.. gh-issue: 103845
.. nonce: V7NYFn
.. section: Core and Builtins

Remove both line and instruction instrumentation before adding new ones for
monitoring, to avoid newly added instrumentation being removed immediately.

..

.. date: 2023-04-25-08-43-11
.. gh-issue: 103763
.. nonce: ZLBZk1
.. section: Core and Builtins

Implement :pep:`695`, adding syntactic support for generic classes, generic
functions, and type aliases.

A new ``type X = ...`` syntax is added for type aliases, which resolves at
runtime to an instance of the new class ``typing.TypeAliasType``. The value
is lazily evaluated and is accessible through the ``.__value__`` attribute.
This is implemented as a new AST node ``ast.TypeAlias``.

New syntax (``class X[T]: ...``, ``def func[T](): ...``) is added for
defining generic functions and classes. This is implemented as a new
``type_params`` attribute on the AST nodes for classes and functions. This
node holds instances of the new AST classes ``ast.TypeVar``,
``ast.ParamSpec``, and ``ast.TypeVarTuple``.

``typing.TypeVar``, ``typing.ParamSpec``, ``typing.ParamSpecArgs``,
``typing.ParamSpecKwargs``, ``typing.TypeVarTuple``, and ``typing.Generic``
are now implemented in C rather than Python.

There are new bytecode instructions ``LOAD_LOCALS``,
``LOAD_CLASSDICT_OR_GLOBAL``, and ``LOAD_CLASSDICT_OR_DEREF`` to support
correct resolution of names in class namespaces.

Patch by Eric Traut, Larry Hastings, and Jelle Zijlstra.

..

.. date: 2023-04-24-21-47-38
.. gh-issue: 103801
.. nonce: WaBanq
.. section: Core and Builtins

Adds three minor linting fixes to the wasm module caught that were caught by
ruff.

..

.. date: 2023-04-24-14-38-16
.. gh-issue: 103793
.. nonce: kqoH6Q
.. section: Core and Builtins

Optimized asyncio Task creation by deferring expensive string formatting
(task name generation) from Task creation to the first time ``get_name`` is
called. This makes asyncio benchmarks up to 5% faster.

..

.. date: 2023-04-21-17-03-14
.. gh-issue: 102310
.. nonce: anLjDx
.. section: Core and Builtins

Change the error range for invalid bytes literals.

..

.. date: 2023-04-21-16-12-41
.. gh-issue: 103590
.. nonce: 7DHDOE
.. section: Core and Builtins

Do not wrap a single exception raised from a ``try-except*`` construct in an
:exc:`ExceptionGroup`.

..

.. date: 2023-04-20-16-17-51
.. gh-issue: 103650
.. nonce: K1MFXR
.. section: Core and Builtins

Change the perf map format to remove the '0x' prefix from the addresses

..

.. date: 2023-04-17-16-00-32
.. gh-issue: 102856
.. nonce: UunJ7y
.. section: Core and Builtins

Implement the required C tokenizer changes for PEP 701. Patch by Pablo
Galindo Salgado, Lysandros Nikolaou, Batuhan Taskaya, Marta Gómez Macías and
sunmy2019.

..

.. date: 2023-04-16-14-38-39
.. gh-issue: 100530
.. nonce: OR6-sn
.. section: Core and Builtins

Clarify the error message raised when the called part of a class pattern
isn't actually a class.

..

.. date: 2023-04-14-22-35-23
.. gh-issue: 101517
.. nonce: 5EqM-S
.. section: Core and Builtins

Fix bug in line numbers of instructions emitted for :keyword:`except*
<except_star>`.

..

.. date: 2023-04-13-00-58-55
.. gh-issue: 103492
.. nonce: P4k0Ay
.. section: Core and Builtins

Clarify :exc:`SyntaxWarning` with literal ``is`` comparison by specifying
which literal is problematic, since comparisons using ``is`` with e.g. ``None``
and bool literals are idiomatic.

..

.. date: 2023-04-12-20-22-03
.. gh-issue: 87729
.. nonce: 99A7UO
.. section: Core and Builtins

Add :opcode:`LOAD_SUPER_ATTR` (and a specialization for
``super().method()``) to speed up ``super().method()`` and ``super().attr``.
This makes ``super().method()`` roughly 2.3x faster and brings it within 20%
of the performance of a simple method call. Patch by Vladimir Matveev and
Carl Meyer.

..

.. date: 2023-04-12-20-18-51
.. gh-issue: 103488
.. nonce: vYvlHD
.. section: Core and Builtins

Change the internal offset distinguishing yield and return target addresses,
so that the instruction pointer is correct for exception handling and other
stack unwinding.

..

.. date: 2023-04-12-19-55-24
.. gh-issue: 82012
.. nonce: FlcJAh
.. section: Core and Builtins

The bitwise inversion operator (``~``) on bool is deprecated. It returns the
bitwise inversion of the underlying ``int`` representation such that
``bool(~True) == True``, which can be confusing. Use ``not`` for logical
negation of bools. In the rare case that you really need the bitwise
inversion of the underlying ``int``, convert to int explicitly ``~int(x)``.

..

.. date: 2023-04-09-22-21-57
.. gh-issue: 77757
.. nonce: _Ow-u2
.. section: Core and Builtins

Exceptions raised in a typeobject's ``__set_name__`` method are no longer
wrapped by a :exc:`RuntimeError`. Context information is added to the
exception as a :pep:`678` note.

..

.. date: 2023-04-09-04-30-02
.. gh-issue: 103333
.. nonce: gKOetS
.. section: Core and Builtins

:exc:`AttributeError` now retains the ``name`` attribute when pickled and
unpickled.

..

.. date: 2023-04-08-17-13-07
.. gh-issue: 103242
.. nonce: ysI1b3
.. section: Core and Builtins

Migrate :meth:`~ssl.SSLContext.set_ecdh_curve` method not to use deprecated
OpenSSL APIs. Patch by Donghee Na.

..

.. date: 2023-04-07-12-18-41
.. gh-issue: 103323
.. nonce: 9802br
.. section: Core and Builtins

We've replaced our use of ``_PyRuntime.tstate_current`` with a thread-local
variable.  This is a fairly low-level implementation detail, and there
should be no change in behavior.

..

.. date: 2023-04-02-22-14-57
.. gh-issue: 84436
.. nonce: hvMgwF
.. section: Core and Builtins

The implementation of PEP-683 which adds Immortal Objects by using a fixed
reference count that skips reference counting to make objects truly
immutable.

..

.. date: 2023-04-01-00-46-31
.. gh-issue: 102700
.. nonce: 493NB4
.. section: Core and Builtins

Allow built-in modules to be submodules. This allows submodules to be
statically linked into a CPython binary.

..

.. date: 2023-03-31-17-24-03
.. gh-issue: 103082
.. nonce: isRUcV
.. section: Core and Builtins

Implement :pep:`669` Low Impact Monitoring for CPython.

..

.. date: 2023-03-25-23-24-38
.. gh-issue: 88691
.. nonce: 2SWBd1
.. section: Core and Builtins

Reduce the number of inline :opcode:`CACHE` entries for :opcode:`CALL`.

..

.. date: 2023-03-07-17-37-00
.. gh-issue: 102500
.. nonce: RUSQhz
.. section: Core and Builtins

Make the buffer protocol accessible in Python code using the new
``__buffer__`` and ``__release_buffer__`` magic methods. See :pep:`688` for
details. Patch by Jelle Zijlstra.

..

.. date: 2023-01-30-15-40-29
.. gh-issue: 97933
.. nonce: nUlp3r
.. section: Core and Builtins

:pep:`709`: inline list, dict and set comprehensions to improve performance
and reduce bytecode size.

..

.. date: 2022-11-08-12-36-25
.. gh-issue: 99184
.. nonce: KIaqzz
.. section: Core and Builtins

Bypass instance attribute access of ``__name__`` in ``repr`` of
:class:`weakref.ref`.

..

.. date: 2022-10-06-23-32-11
.. gh-issue: 98003
.. nonce: xWE0Yu
.. section: Core and Builtins

Complex function calls are now faster and consume no C stack space.

..

.. bpo: 39610
.. date: 2020-02-11-15-54-40
.. nonce: fvgsCl
.. section: Core and Builtins

``len()`` for 0-dimensional :class:`memoryview` objects (such as
``memoryview(ctypes.c_uint8(42))``) now raises a :exc:`TypeError`.
Previously this returned ``1``, which was not consistent with ``mem_0d[0]``
raising an :exc:`IndexError`.

..

.. bpo: 31821
.. date: 2019-12-01-12-58-31
.. nonce: 1FNmwk
.. section: Core and Builtins

Fix :func:`!pause_reading` to work when called from :func:`!connection_made`
in :mod:`asyncio`.

..

.. date: 2023-05-17-21-01-48
.. gh-issue: 104600
.. nonce: E6CK35
.. section: Library

:func:`functools.update_wrapper` now sets the ``__type_params__`` attribute
(added by :pep:`695`).

..

.. date: 2023-05-17-20-03-01
.. gh-issue: 104340
.. nonce: kp_XmX
.. section: Library

When an ``asyncio`` pipe protocol loses its connection due to an error, and
the caller doesn't await ``wait_closed()`` on the corresponding
``StreamWriter``, don't log a warning about an exception that was never
retrieved. After all, according to the ``StreamWriter.close()`` docs, the
``wait_closed()`` call is optional ("not mandatory").

..

.. date: 2023-05-17-16-58-23
.. gh-issue: 104555
.. nonce: 5rb5oM
.. section: Library

Fix issue where an :func:`issubclass` check comparing a class ``X`` against
a :func:`runtime-checkable protocol <typing.runtime_checkable>` ``Y`` with
non-callable members would not cause :exc:`TypeError` to be raised if an
:func:`isinstance` call had previously been made comparing an instance of
``X`` to ``Y``. This issue was present in edge cases on Python 3.11, but
became more prominent in 3.12 due to some unrelated changes that were made
to runtime-checkable protocols. Patch by Alex Waygood.

..

.. date: 2023-05-17-08-01-36
.. gh-issue: 104372
.. nonce: jpoWs6
.. section: Library

Refactored the ``_posixsubprocess`` internals to avoid Python C API usage
between fork and exec when marking ``pass_fds=`` file descriptors
inheritable.

..

.. date: 2023-05-17-03-14-07
.. gh-issue: 104484
.. nonce: y6KxL6
.. section: Library

Added *case_sensitive* argument to :meth:`pathlib.PurePath.match`

..

.. date: 2023-05-16-11-02-44
.. gh-issue: 75367
.. nonce: qLWR35
.. section: Library

Fix data descriptor detection in  :func:`inspect.getattr_static`.

..

.. date: 2023-05-16-10-07-16
.. gh-issue: 104536
.. nonce: hFWD8f
.. section: Library

Fix a race condition in the internal :mod:`multiprocessing.process` cleanup
logic that could manifest as an unintended ``AttributeError`` when calling
``process.close()``.

..

.. date: 2023-05-12-19-29-28
.. gh-issue: 103857
.. nonce: 0IzSxr
.. section: Library

Update datetime deprecations' stracktrace to point to the calling line

..

.. date: 2023-05-11-21-32-18
.. gh-issue: 101520
.. nonce: l9MjRE
.. section: Library

Move the core functionality of the ``tracemalloc`` module in the ``Python/``
folder, leaving just the module wrapper in ``Modules/``.

..

.. date: 2023-05-11-07-50-00
.. gh-issue: 104392
.. nonce: YSllzt
.. section: Library

Remove undocumented and unused ``_paramspec_tvars`` attribute from some
classes in :mod:`typing`.

..

.. date: 2023-05-11-01-07-42
.. gh-issue: 102613
.. nonce: uMsokt
.. section: Library

Fix issue where :meth:`pathlib.Path.glob` raised :exc:`RecursionError` when
walking deep directory trees.

..

.. date: 2023-05-10-19-33-36
.. gh-issue: 103000
.. nonce: j0KSfD
.. section: Library

Improve performance of :func:`dataclasses.asdict` for the common case where
*dict_factory* is ``dict``. Patch by David C Ellis.

..

.. date: 2023-05-09-18-46-24
.. gh-issue: 104301
.. nonce: gNnbId
.. section: Library

Allow leading whitespace in disambiguated statements in :mod:`pdb`.

..

.. date: 2023-05-08-23-01-59
.. gh-issue: 104139
.. nonce: 83Tnt-
.. section: Library

Teach :func:`urllib.parse.unsplit` to retain the ``"//"`` when assembling
``itms-services://?action=generate-bugs`` style `Apple Platform Deployment
<https://support.apple.com/en-gb/guide/deployment/depce7cefc4d/web>`_ URLs.

..

.. date: 2023-05-08-20-57-17
.. gh-issue: 104307
.. nonce: DSB93G
.. section: Library

:func:`socket.getnameinfo` now releases the GIL while contacting the DNS
server

..

.. date: 2023-05-08-15-50-59
.. gh-issue: 104310
.. nonce: fXVSPY
.. section: Library

Users may now use ``importlib.util.allowing_all_extensions()`` (a context
manager) to temporarily disable the strict compatibility checks for
importing extension modules in subinterpreters.

..

.. date: 2023-05-08-15-39-00
.. gh-issue: 87695
.. nonce: f6iO7v
.. section: Library

Fix issue where :meth:`pathlib.Path.glob` raised :exc:`OSError` when it
encountered a symlink to an overly long path.

..

.. date: 2023-05-07-19-56-45
.. gh-issue: 104265
.. nonce: fVblry
.. section: Library

Prevent possible crash by disallowing instantiation of the
:class:`!_csv.Reader` and :class:`!_csv.Writer` types. The regression was
introduced in 3.10.0a4 with PR 23224 (:issue:`14935`). Patch by Radislav
Chugunov.

..

.. date: 2023-05-06-20-37-46
.. gh-issue: 102613
.. nonce: QZG9iX
.. section: Library

Improve performance of :meth:`pathlib.Path.glob` when expanding recursive
wildcards ("``**``") by merging adjacent wildcards and de-duplicating
results only when necessary.

..

.. date: 2023-05-05-18-52-22
.. gh-issue: 65772
.. nonce: w5P5Wv
.. section: Library

Remove unneeded comments and code in turtle.py.

..

.. date: 2023-05-03-19-22-24
.. gh-issue: 90208
.. nonce: tI00da
.. section: Library

Fixed issue where :meth:`pathlib.Path.glob` returned incomplete results when
it encountered a :exc:`PermissionError`. This method now suppresses all
:exc:`OSError` exceptions, except those raised from calling
:meth:`~pathlib.Path.is_dir` on the top-level path.

..

.. date: 2023-05-03-16-51-53
.. gh-issue: 104144
.. nonce: 653Q0P
.. section: Library

Optimize :class:`asyncio.TaskGroup` when using
:func:`asyncio.eager_task_factory`. Skip scheduling a done callback if a
TaskGroup task completes eagerly.

..

.. date: 2023-05-03-16-50-24
.. gh-issue: 104144
.. nonce: yNkjL8
.. section: Library

Optimize :func:`asyncio.gather` when using
:func:`asyncio.eager_task_factory` to complete eagerly if all fututres
completed eagerly. Avoid scheduling done callbacks for futures that complete
eagerly.

..

.. date: 2023-05-03-03-14-33
.. gh-issue: 104114
.. nonce: RG26RD
.. section: Library

Fix issue where :meth:`pathlib.Path.glob` returns paths using the case of
non-wildcard segments for corresponding path segments, rather than the real
filesystem case.

..

.. date: 2023-05-02-21-05-30
.. gh-issue: 104104
.. nonce: 9tjplT
.. section: Library

Improve performance of :meth:`pathlib.Path.glob` by using
:const:`re.IGNORECASE` to implement case-insensitive matching.

..

.. date: 2023-05-02-20-43-03
.. gh-issue: 104102
.. nonce: vgSdEJ
.. section: Library

Improve performance of :meth:`pathlib.Path.glob` when evaluating patterns
that contain ``'../'`` segments.

..

.. date: 2023-05-02-04-49-45
.. gh-issue: 103822
.. nonce: m0QdAO
.. section: Library

Update the return type of ``weekday`` to the newly added Day attribute

..

.. date: 2023-05-01-19-10-05
.. gh-issue: 103629
.. nonce: 81bpZz
.. section: Library

Update the ``repr`` of :class:`typing.Unpack` according to :pep:`692`.

..

.. date: 2023-05-01-17-58-28
.. gh-issue: 103963
.. nonce: XWlHx7
.. section: Library

Make :mod:`dis` display the names of the args for
:opcode:`!CALL_INTRINSIC_*`.

..

.. date: 2023-05-01-16-43-28
.. gh-issue: 104035
.. nonce: MrJBw8
.. section: Library

Do not ignore user-defined ``__getstate__`` and ``__setstate__`` methods for
slotted frozen dataclasses.

..

.. date: 2023-04-29-18-23-16
.. gh-issue: 103987
.. nonce: sRgALL
.. section: Library

In :mod:`mmap`, fix several bugs that could lead to access to memory-mapped
files after they have been invalidated.

..

.. date: 2023-04-28-19-08-50
.. gh-issue: 103977
.. nonce: msF70A
.. section: Library

Improve import time of :mod:`platform` module.

..

.. date: 2023-04-28-18-04-23
.. gh-issue: 88773
.. nonce: xXCNJw
.. section: Library

Added :func:`turtle.teleport` to the :mod:`turtle` module to move a turtle
to a new point without tracing a line, visible or invisible.  Patch by Liam
Gersten.

..

.. date: 2023-04-27-20-03-08
.. gh-issue: 103935
.. nonce: Uaf2M0
.. section: Library

Use :func:`io.open_code` for files to be executed instead of raw
:func:`open`

..

.. date: 2023-04-27-18-46-31
.. gh-issue: 68968
.. nonce: E3tnhy
.. section: Library

Fixed garbled output of :meth:`~unittest.TestCase.assertEqual` when an input
lacks final newline.

..

.. date: 2023-04-27-00-45-41
.. gh-issue: 100370
.. nonce: MgZ3KY
.. section: Library

Fix potential :exc:`OverflowError` in :meth:`sqlite3.Connection.blobopen`
for 32-bit builds. Patch by Erlend E. Aasland.

..

.. date: 2023-04-27-00-05-32
.. gh-issue: 102628
.. nonce: X230E-
.. section: Library

Substitute CTRL-D with CTRL-Z in :mod:`sqlite3` CLI banner when running on
Windows.

..

.. date: 2023-04-26-18-12-13
.. gh-issue: 103636
.. nonce: -KvCgO
.. section: Library

Module-level attributes ``January`` and ``February`` are deprecated from
:mod:`calendar`.

..

.. date: 2023-04-26-15-14-36
.. gh-issue: 103583
.. nonce: iCMDFt
.. section: Library

Isolate :mod:`!_multibytecodec` and codecs extension modules. Patches by
Erlend E. Aasland.

..

.. date: 2023-04-26-09-54-25
.. gh-issue: 103848
.. nonce: aDSnpR
.. section: Library

Add checks to ensure that ``[`` bracketed ``]`` hosts found by
:func:`urllib.parse.urlsplit` are of IPv6 or IPvFuture format.

..

.. date: 2023-04-26-09-38-47
.. gh-issue: 103872
.. nonce: 8LBsDz
.. section: Library

Update the bundled copy of pip to version 23.1.2.

..

.. date: 2023-04-25-22-59-06
.. gh-issue: 99944
.. nonce: pst8iT
.. section: Library

Make :mod:`dis` display the value of oparg of :opcode:`!KW_NAMES`.

..

.. date: 2023-04-25-22-06-00
.. gh-issue: 74940
.. nonce: TOacQ9
.. section: Library

The C.UTF-8 locale is no longer converted to en_US.UTF-8, enabling the use
of UTF-8 encoding on systems which have no locales installed.

..

.. date: 2023-04-25-19-58-13
.. gh-issue: 103861
.. nonce: JeozgD
.. section: Library

Fix ``zipfile.Zipfile`` creating invalid zip files when ``force_zip64`` was
used to add files to them. Patch by Carey Metcalfe.

..

.. date: 2023-04-25-17-03-18
.. gh-issue: 103857
.. nonce: Mr2Cak
.. section: Library

Deprecated :meth:`datetime.datetime.utcnow` and
:meth:`datetime.datetime.utcfromtimestamp`. (Patch by Paul Ganssle)

..

.. date: 2023-04-25-16-31-00
.. gh-issue: 103839
.. nonce: tpyLhI
.. section: Library

Avoid compilation error due to tommath.h not being found when building
Tkinter against Tcl 8.7 built with bundled libtommath.

..

.. date: 2023-04-24-23-07-56
.. gh-issue: 103791
.. nonce: bBPWdS
.. section: Library

:class:`contextlib.suppress` now supports suppressing exceptions raised as
part of an :exc:`ExceptionGroup`. If other exceptions exist on the group,
they are re-raised in a group that does not contain the suppressed
exceptions.

..

.. date: 2023-04-24-16-00-28
.. gh-issue: 90750
.. nonce: da0Xi8
.. section: Library

Use :meth:`datetime.datetime.fromisocalendar` in the implementation of
:meth:`datetime.datetime.strptime`, which should now accept only valid ISO
dates. (Patch by Paul Ganssle)

..

.. date: 2023-04-24-00-34-23
.. gh-issue: 103685
.. nonce: U14jBM
.. section: Library

Prepare :meth:`tkinter.Menu.index` for Tk 8.7 so that it does not raise
``TclError: expected integer but got ""`` when it should return ``None``.

..

.. date: 2023-04-23-15-39-17
.. gh-issue: 81403
.. nonce: zVz9Td
.. section: Library

:class:`urllib.request.CacheFTPHandler` no longer raises :class:`URLError`
if a cached FTP instance is reused. ftplib's endtransfer method calls
voidresp to drain the connection to handle FTP instance reuse properly.

..

.. date: 2023-04-22-22-37-39
.. gh-issue: 103699
.. nonce: NizCjc
.. section: Library

Add ``__orig_bases__`` to non-generic TypedDicts, call-based TypedDicts, and
call-based NamedTuples. Other TypedDicts and NamedTuples already had the
attribute.

..

.. date: 2023-04-22-21-34-13
.. gh-issue: 103693
.. nonce: SBtuLQ
.. section: Library

Add convenience variable feature to :mod:`pdb`

..

.. date: 2023-04-22-12-30-10
.. gh-issue: 92248
.. nonce: NcVTKR
.. section: Library

Deprecate ``type``, ``choices``, and ``metavar`` parameters of
``argparse.BooleanOptionalAction``.

..

.. date: 2023-04-22-11-20-27
.. gh-issue: 89415
.. nonce: YHk760
.. section: Library

Add :mod:`socket` constants for source-specific multicast. Patch by Reese
Hyde.

..

.. date: 2023-04-22-02-41-06
.. gh-issue: 103673
.. nonce: oE7S_k
.. section: Library

:mod:`socketserver` gains ``ForkingUnixStreamServer`` and
``ForkingUnixDatagramServer`` classes. Patch by Jay Berry.

..

.. date: 2023-04-21-10-25-39
.. gh-issue: 103636
.. nonce: YK6NEa
.. section: Library

Added Enum for months and days in the calendar module.

..

.. date: 2023-04-19-16-08-53
.. gh-issue: 84976
.. nonce: HwbzlD
.. section: Library

Create a new ``Lib/_pydatetime.py`` file that defines the Python version of
the ``datetime`` module, and make ``datetime`` import the contents of the
new library only if the C implementation is missing. Currently, the full
Python implementation is defined and then deleted if the C implementation is
not available, slowing down ``import datetime`` unnecessarily.

..

.. date: 2023-04-17-14-47-28
.. gh-issue: 103596
.. nonce: ME1y3_
.. section: Library

Attributes/methods are no longer shadowed by same-named enum members,
although they may be shadowed by enum.property's.

..

.. date: 2023-04-16-19-48-21
.. gh-issue: 103584
.. nonce: 3mBTuM
.. section: Library

Updated ``importlib.metadata`` with changes from ``importlib_metadata`` 5.2
through 6.5.0, including: Support ``installed-files.txt`` for
``Distribution.files`` when present. ``PackageMetadata`` now stipulates an
additional ``get`` method allowing for easy querying of metadata keys that
may not be present. ``packages_distributions`` now honors packages and
modules with Python modules that not ``.py`` sources (e.g. ``.pyc``,
``.so``). Expand protocol for ``PackageMetadata.get_all`` to match the
upstream implementation of ``email.message.Message.get_all`` in
python/typeshed#9620. Deprecated use of ``Distribution`` without defining
abstract methods. Deprecated expectation that
``PackageMetadata.__getitem__`` will return ``None`` for missing keys. In
the future, it will raise a ``KeyError``.

..

.. date: 2023-04-16-18-29-04
.. gh-issue: 103578
.. nonce: fly1wc
.. section: Library

Fixed a bug where :mod:`pdb` crashes when reading source file with different
encoding by replacing :func:`io.open` with :func:`io.open_code`. The new
method would also call into the hook set by :c:func:`PyFile_SetOpenCodeHook`.

..

.. date: 2023-04-15-12-19-14
.. gh-issue: 103556
.. nonce: TEf-2m
.. section: Library

Now creating :class:`inspect.Signature` objects with positional-only
parameter with a default followed by a positional-or-keyword parameter
without one is impossible.

..

.. date: 2023-04-15-11-21-38
.. gh-issue: 103559
.. nonce: a9rYHG
.. section: Library

Update the bundled copy of pip to version 23.1.1.

..

.. date: 2023-04-14-21-16-05
.. gh-issue: 103548
.. nonce: lagdpp
.. section: Library

Improve performance of :meth:`pathlib.Path.absolute` and
:meth:`~pathlib.Path.cwd` by joining paths only when necessary. Also improve
performance of :meth:`pathlib.PurePath.is_absolute` on Posix by skipping
path parsing and normalization.

..

.. date: 2023-04-14-21-12-32
.. gh-issue: 103538
.. nonce: M4FK_v
.. section: Library

Remove ``_tkinter`` module code guarded by definition of the ``TK_AQUA``
macro which was only needed for Tk 8.4.7 or earlier and was never actually
defined by any build system or documented for manual use.

..

.. date: 2023-04-14-06-32-54
.. gh-issue: 103533
.. nonce: n_AfcS
.. section: Library

Update :mod:`cProfile` to use PEP 669 API

..

.. date: 2023-04-13-19-43-15
.. gh-issue: 103525
.. nonce: uY4VYg
.. section: Library

Fix misleading exception message when mixed ``str`` and ``bytes`` arguments
are supplied to :class:`pathlib.PurePath` and :class:`~pathlib.Path`.

..

.. date: 2023-04-13-13-17-47
.. gh-issue: 103489
.. nonce: ZSZgmu
.. section: Library

Add :meth:`~sqlite3.Connection.getconfig` and
:meth:`~sqlite3.Connection.setconfig` to :class:`~sqlite3.Connection` to
make configuration changes to a database connection. Patch by Erlend E.
Aasland.

..

.. date: 2023-04-12-17-59-55
.. gh-issue: 103365
.. nonce: UBEE0U
.. section: Library

Set default Flag boundary to ``STRICT`` and fix bitwise operations.

..

.. date: 2023-04-12-13-04-16
.. gh-issue: 103472
.. nonce: C6bOHv
.. section: Library

Avoid a potential :exc:`ResourceWarning` in
:class:`http.client.HTTPConnection` by closing the proxy / tunnel's CONNECT
response explicitly.

..

.. date: 2023-04-12-06-00-02
.. gh-issue: 103462
.. nonce: w6yBlM
.. section: Library

Fixed an issue with using :meth:`~asyncio.WriteTransport.writelines` in
:mod:`asyncio` to send very large payloads that exceed the amount of data
that can be written in one call to :meth:`socket.socket.send` or
:meth:`socket.socket.sendmsg`, resulting in the remaining buffer being left
unwritten.

..

.. date: 2023-04-11-21-38-39
.. gh-issue: 103449
.. nonce: -nxmhb
.. section: Library

Fix a bug in doc string generation in :func:`dataclasses.dataclass`.

..

.. date: 2023-04-09-06-59-36
.. gh-issue: 103092
.. nonce: vskbro
.. section: Library

Isolate :mod:`!_collections` (apply :pep:`687`). Patch by Erlend E. Aasland.

..

.. date: 2023-04-08-01-33-12
.. gh-issue: 103357
.. nonce: vjin28
.. section: Library

Added support for :class:`logging.Formatter` ``defaults`` parameter to
:func:`logging.config.dictConfig` and :func:`logging.config.fileConfig`.
Patch by Bar Harel.

..

.. date: 2023-04-08-00-48-40
.. gh-issue: 103092
.. nonce: 5EFts0
.. section: Library

Adapt the :mod:`winreg` extension module to :pep:`687`.

..

.. date: 2023-04-07-15-15-40
.. gh-issue: 74690
.. nonce: un84hh
.. section: Library

The performance of :func:`isinstance` checks against
:func:`runtime-checkable protocols <typing.runtime_checkable>` has been
considerably improved for protocols that only have a few members. To achieve
this improvement, several internal implementation details of the
:mod:`typing` module have been refactored, including
``typing._ProtocolMeta.__instancecheck__``,
``typing._is_callable_members_only``, and ``typing._get_protocol_attrs``.
Patches by Alex Waygood.

..

.. date: 2023-04-07-15-09-26
.. gh-issue: 74690
.. nonce: 0f886b
.. section: Library

The members of a runtime-checkable protocol are now considered "frozen" at
runtime as soon as the class has been created. See :ref:`"What's new in
Python 3.12" <whatsnew-typing-py312>` for more details.

..

.. date: 2023-04-06-17-28-36
.. gh-issue: 103256
.. nonce: 1syxfs
.. section: Library

Fixed a bug that caused :mod:`hmac` to raise an exception when the requested
hash algorithm was not available in OpenSSL despite being available
separately as part of ``hashlib`` itself.  It now falls back properly to the
built-in. This could happen when, for example, your OpenSSL does not include
SHA3 support and you want to compute ``hmac.digest(b'K', b'M',
'sha3_256')``.

..

.. date: 2023-04-06-16-55-51
.. gh-issue: 102778
.. nonce: BWeAmE
.. section: Library

Support ``sys.last_exc`` in :mod:`idlelib`.

..

.. date: 2023-04-06-04-35-59
.. gh-issue: 103285
.. nonce: rCZ9-G
.. section: Library

Improve performance of :func:`ast.get_source_segment`.

..

.. date: 2023-04-05-01-28-53
.. gh-issue: 103225
.. nonce: QD3JVU
.. section: Library

Fix a bug in :mod:`pdb` when displaying line numbers of module-level source
code.

..

.. date: 2023-04-04-21-44-25
.. gh-issue: 103092
.. nonce: Dz0_Xn
.. section: Library

Adapt the :mod:`msvcrt` extension module to :pep:`687`.

..

.. date: 2023-04-04-21-27-51
.. gh-issue: 103092
.. nonce: 7s7Bzf
.. section: Library

Adapt the :mod:`winsound` extension module to :pep:`687`.

..

.. date: 2023-04-04-12-43-38
.. gh-issue: 93910
.. nonce: jurMzv
.. section: Library

Remove deprecation of enum ``member.member`` access.

..

.. date: 2023-04-03-23-44-34
.. gh-issue: 102978
.. nonce: gy9eVk
.. section: Library

Fixes :func:`unittest.mock.patch` not enforcing function signatures for
methods decorated with ``@classmethod`` or ``@staticmethod`` when patch is
called with ``autospec=True``.

..

.. date: 2023-04-03-23-43-12
.. gh-issue: 103092
.. nonce: 3xqk4y
.. section: Library

Isolate :mod:`!_socket` (apply :pep:`687`). Patch by Erlend E. Aasland.

..

.. date: 2023-04-03-22-02-35
.. gh-issue: 100479
.. nonce: kNBjQm
.. section: Library

Add :meth:`pathlib.PurePath.with_segments`, which creates a path object from
arguments. This method is called whenever a derivative path is created, such
as from :attr:`pathlib.PurePath.parent`. Subclasses may override this method
to share information between path objects.

..

.. date: 2023-04-03-21-08-53
.. gh-issue: 103220
.. nonce: OW_Bj5
.. section: Library

Fix issue where :func:`os.path.join` added a slash when joining onto an
incomplete UNC drive with a trailing slash on Windows.

..

.. date: 2023-04-02-23-05-22
.. gh-issue: 103204
.. nonce: bbDmu0
.. section: Library

Fixes :mod:`http.server` accepting HTTP requests with HTTP version numbers
preceded by '+', or '-', or with digit-separating '_' characters.  The
length of the version numbers is also constrained.

..

.. date: 2023-04-02-22-04-26
.. gh-issue: 75586
.. nonce: 526iJm
.. section: Library

Fix various Windows-specific issues with ``shutil.which``.

..

.. date: 2023-04-02-17-51-08
.. gh-issue: 103193
.. nonce: xrZbM1
.. section: Library

Improve performance of :func:`inspect.getattr_static`. Patch by Alex
Waygood.

..

.. date: 2023-04-01-23-01-31
.. gh-issue: 103176
.. nonce: FBsdxa
.. section: Library

:func:`sys._current_exceptions` now returns a mapping from thread-id to an
exception instance, rather than to a ``(typ, exc, tb)`` tuple.

..

.. date: 2023-03-31-01-13-00
.. gh-issue: 103143
.. nonce: 6eMluy
.. section: Library

Polish the help messages and docstrings of :mod:`pdb`.

..

.. date: 2023-03-28-09-13-31
.. gh-issue: 103015
.. nonce: ETTfNf
.. section: Library

Add *entrypoint* keyword-only parameter to
:meth:`sqlite3.Connection.load_extension`, for overriding the SQLite
extension entry point. Patch by Erlend E. Aasland.

..

.. date: 2023-03-24-20-49-48
.. gh-issue: 103000
.. nonce: 6eVNZI
.. section: Library

Improve performance of :func:`dataclasses.astuple` and
:func:`dataclasses.asdict` in cases where the contents are common Python
types.

..

.. date: 2023-03-23-15-24-38
.. gh-issue: 102953
.. nonce: YR4KaK
.. section: Library

The extraction methods in :mod:`tarfile`, and :func:`shutil.unpack_archive`,
have a new a *filter* argument that allows limiting tar features than may be
surprising or dangerous, such as creating files outside the destination
directory. See :ref:`tarfile-extraction-filter` for details.

..

.. date: 2023-03-15-12-18-07
.. gh-issue: 97696
.. nonce: DtnpIC
.. section: Library

Implemented an eager task factory in asyncio. When used as a task factory on
an event loop, it performs eager execution of coroutines. Coroutines that
are able to complete synchronously (e.g. return or raise without blocking)
are returned immediately as a finished task, and the task is never scheduled
to the event loop. If the coroutine blocks, the (pending) task is scheduled
and returned.

..

.. date: 2023-03-15-00-37-43
.. gh-issue: 81079
.. nonce: heTAod
.. section: Library

Add *case_sensitive* keyword-only argument to :meth:`pathlib.Path.glob` and
:meth:`~pathlib.Path.rglob`.

..

.. date: 2023-03-14-11-20-19
.. gh-issue: 101819
.. nonce: 0-h0it
.. section: Library

Isolate the :mod:`io` extension module by applying :pep:`687`. Patch by
Kumar Aditya, Victor Stinner, and Erlend E. Aasland.

..

.. date: 2023-03-08-02-45-46
.. gh-issue: 91896
.. nonce: kgON_a
.. section: Library

Deprecate :class:`collections.abc.ByteString`

..

.. date: 2023-03-06-18-49-57
.. gh-issue: 101362
.. nonce: eSSy6L
.. section: Library

Speed up :class:`pathlib.Path` construction by omitting the path anchor from
the internal list of path parts.

..

.. date: 2023-02-21-14-57-34
.. gh-issue: 102114
.. nonce: uUDQzb
.. section: Library

Functions in the :mod:`dis` module that accept a source code string as
argument now print a more concise traceback when the string contains a
syntax or indentation error.

..

.. date: 2023-02-19-12-37-08
.. gh-issue: 62432
.. nonce: GnBFIB
.. section: Library

The :mod:`unittest` runner will now exit with status code 5 if no tests were
run. It is common for test runner misconfiguration to fail to find any
tests, this should be an error.

..

.. date: 2023-02-17-21-14-40
.. gh-issue: 78079
.. nonce: z3Szr6
.. section: Library

Fix incorrect normalization of UNC device path roots, and partial UNC share
path roots, in :class:`pathlib.PurePath`. Pathlib no longer appends a
trailing slash to such paths.

..

.. date: 2023-02-11-21-18-10
.. gh-issue: 85984
.. nonce: nvzOD0
.. section: Library

Add :func:`tty.cfmakeraw` and :func:`tty.cfmakecbreak` to :mod:`tty` and
modernize, the behavior of :func:`tty.setraw` and :func:`tty.setcbreak` to
use POSIX.1-2017 Chapter 11 "General Terminal Interface" flag masks by
default.

..

.. date: 2023-02-11-15-01-32
.. gh-issue: 101688
.. nonce: kwXmfM
.. section: Library

Implement :func:`types.get_original_bases` to provide further introspection
for types.

..

.. date: 2023-02-09-22-24-34
.. gh-issue: 101640
.. nonce: oFuEpB
.. section: Library

:class:`argparse.ArgumentParser` now catches errors when writing messages,
such as when :data:`sys.stderr` is ``None``. Patch by Oleg Iarygin.

..

.. date: 2023-02-06-16-45-18
.. gh-issue: 83861
.. nonce: mMbIU3
.. section: Library

Fix datetime.astimezone method return value when invoked on a naive datetime
instance that represents local time falling in a timezone transition gap.
PEP 495 requires that instances with fold=1 produce earlier times than those
with fold=0 in this case.

..

.. date: 2023-01-22-14-53-12
.. gh-issue: 89550
.. nonce: c1U23f
.. section: Library

Decrease execution time of some :mod:`gzip` file writes by 15% by adding
more appropriate buffering.

..

.. date: 2023-01-14-17-54-56
.. gh-issue: 95299
.. nonce: vUhpKz
.. section: Library

Remove the bundled setuptools wheel from ``ensurepip``, and stop installing
setuptools in environments created by ``venv``.

..

.. date: 2022-11-10-16-26-47
.. gh-issue: 99353
.. nonce: DQFjnt
.. section: Library

Respect the :class:`http.client.HTTPConnection` ``.debuglevel`` flag in
:class:`urllib.request.AbstractHTTPHandler` when its constructor parameter
``debuglevel`` is not set. And do the same for ``*HTTPS*``.

..

.. date: 2022-10-21-17-20-57
.. gh-issue: 98040
.. nonce: 3btbmA
.. section: Library

Remove the long-deprecated ``imp`` module.

..

.. date: 2022-10-21-16-23-31
.. gh-issue: 97850
.. nonce: N46coo
.. section: Library

Deprecate :func:`pkgutil.find_loader` and :func:`pkgutil.get_loader` in
favor of :func:`importlib.util.find_spec`.

..

.. date: 2022-10-20-14-03-58
.. gh-issue: 94473
.. nonce: pzGX73
.. section: Library

Flatten arguments in :meth:`tkinter.Canvas.coords`. It now accepts not only
``x1, y1, x2, y2, ...`` and ``[x1, y1, x2, y2, ...]``, but also ``(x1, y1),
(x2, y2), ...`` and ``[(x1, y1), (x2, y2), ...]``.

..

.. date: 2022-10-09-14-47-42
.. gh-issue: 98040
.. nonce: IN3qab
.. section: Library

Remove more deprecated importlib APIs: ``find_loader()``, ``find_module()``,
``importlib.abc.Finder``, ``pkgutil.ImpImporter``, ``pkgutil.ImpLoader``.

..

.. date: 2022-09-07-09-32-07
.. gh-issue: 96522
.. nonce: t73oqp
.. section: Library

Fix potential deadlock in pty.spawn()

..

.. date: 2022-09-03-09-24-02
.. gh-issue: 96534
.. nonce: EU4Oxv
.. section: Library

Support divert(4) added in FreeBSD 14.

..

.. date: 2022-08-27-21-41-41
.. gh-issue: 87474
.. nonce: 9X-kxt
.. section: Library

Fix potential file descriptor leaks in :class:`subprocess.Popen`.

..

.. date: 2022-07-16-17-15-29
.. gh-issue: 94906
.. nonce: C4G8DG
.. section: Library

Support multiple steps in :func:`math.nextafter`. Patch by Shantanu Jain and
Matthias Gorgens.

..

.. date: 2022-07-06-11-10-37
.. gh-issue: 51574
.. nonce: sveUeD
.. section: Library

Make :func:`tempfile.mkdtemp` return absolute paths when its *dir* parameter
is relative.

..

.. date: 2022-07-03-23-13-28
.. gh-issue: 94518
.. nonce: 511Tbh
.. section: Library

Convert private :meth:`!_posixsubprocess.fork_exec` to use Argument Clinic.

..

.. date: 2022-05-02-16-21-05
.. gh-issue: 92184
.. nonce: hneGVW
.. section: Library

When creating zip files using :mod:`zipfile`, ``os.altsep``, if not
``None``, will always be treated as a path separator even when it is not
``/``. Patch by Carey Metcalfe.

..

.. bpo: 46797
.. date: 2022-02-19-14-19-34
.. nonce: 6BXZX4
.. section: Library

Deprecation warnings are now emitted for :class:`!ast.Num`,
:class:`!ast.Bytes`, :class:`!ast.Str`, :class:`!ast.NameConstant` and
:class:`!ast.Ellipsis`. These have been documented as deprecated since
Python 3.8, and will be removed in Python 3.14.

..

.. bpo: 44844
.. date: 2021-12-03-23-00-56
.. nonce: tvg2VY
.. section: Library

Enables :mod:`webbrowser` to detect and launch Microsoft Edge browser.

..

.. bpo: 45606
.. date: 2021-11-19-23-37-18
.. nonce: UW5XE1
.. section: Library

Fixed the bug in :meth:`pathlib.Path.glob` -- previously a dangling symlink
would not be found by this method when the pattern is an exact match, but
would be found when the pattern contains a wildcard or the recursive
wildcard (``**``). With this change, a dangling symlink will be found in
both cases.

..

.. bpo: 23041
.. date: 2021-11-07-15-31-25
.. nonce: 564i32
.. section: Library

Add :const:`~csv.QUOTE_STRINGS` and :const:`~csv.QUOTE_NOTNULL` to the suite
of :mod:`csv` module quoting styles.

..

.. bpo: 24964
.. date: 2021-05-16-14-28-30
.. nonce: Oa5Ie_
.. section: Library

Added :meth:`http.client.HTTPConnection.get_proxy_response_headers` that
provides access to the HTTP headers on a proxy server response to the
``CONNECT`` request.

..

.. bpo: 17258
.. date: 2020-05-25-12-42-36
.. nonce: lf2554
.. section: Library

:mod:`multiprocessing` now supports stronger HMAC algorithms for
inter-process connection authentication rather than only HMAC-MD5.

..

.. bpo: 39744
.. date: 2020-02-25-00-43-22
.. nonce: hgK689
.. section: Library

Make :func:`asyncio.subprocess.Process.communicate` close the subprocess's
stdin even when called with ``input=None``.

..

.. bpo: 22708
.. date: 2018-07-16-14-10-29
.. nonce: 592iRR
.. section: Library

http.client CONNECT method tunnel improvements: Use HTTP 1.1 protocol; send
a matching Host: header with CONNECT, if one is not provided; convert IDN
domain names to Punycode. Patch by Michael Handler.

..

.. date: 2023-05-14-12-11-28
.. gh-issue: 67056
.. nonce: nVC2Rf
.. section: Documentation

Document that the effect of registering or unregistering an :mod:`atexit`
cleanup function from within a registered cleanup function is undefined.

..

.. date: 2023-04-26-23-55-31
.. gh-issue: 103629
.. nonce: -0reqn
.. section: Documentation

Mention the new way of typing ``**kwargs`` with ``Unpack`` and ``TypedDict``
introduced in :pep:`692`.

..

.. date: 2023-04-25-22-58-08
.. gh-issue: 48241
.. nonce: l1Gxxh
.. section: Documentation

Clarifying documentation about the url parameter to urllib.request.urlopen
and urllib.request.Request needing to be encoded properly.

..

.. date: 2023-03-10-04-59-35
.. gh-issue: 86094
.. nonce: zOYdy8
.. section: Documentation

Add support for Unicode Path Extra Field in ZipFile. Patch by Yeojin Kim and
Andrea Giudiceandrea

..

.. date: 2023-03-07-23-30-29
.. gh-issue: 99202
.. nonce: hhiAJF
.. section: Documentation

Fix extension type from documentation for compiling in C++20 mode

..

.. date: 2023-05-15-02-22-44
.. gh-issue: 104494
.. nonce: Bkrbfn
.. section: Tests

Update ``test_pack_configure_in`` and ``test_place_configure_in`` for
changes to error message formatting in Tk 8.7.

..

.. date: 2023-05-14-03-00-00
.. gh-issue: 104461
.. nonce: Rmex11
.. section: Tests

Run test_configure_screen on X11 only, since the ``DISPLAY`` environment
variable and ``-screen`` option for toplevels are not useful on Tk for Win32
or Aqua.

..

.. date: 2023-04-25-12-19-37
.. gh-issue: 86275
.. nonce: -RoLIt
.. section: Tests

Added property-based tests to the :mod:`zoneinfo` tests, along with stubs
for the ``hypothesis`` interface. (Patch by Paul Ganssle)

..

.. date: 2023-04-08-00-50-23
.. gh-issue: 103329
.. nonce: M38tqF
.. section: Tests

Regression tests for the behaviour of ``unittest.mock.PropertyMock`` were
added.

..

.. date: 2023-03-17-22-00-47
.. gh-issue: 102795
.. nonce: z21EoC
.. section: Tests

fix use of poll in test_epoll's test_control_and_wait

..

.. date: 2022-11-06-18-42-38
.. gh-issue: 75729
.. nonce: uGYJrv
.. section: Tests

Fix the :func:`os.spawn* <os.spawnl>` tests failing on Windows when the
working directory or interpreter path contains spaces.

..

.. date: 2023-05-20-16-09-59
.. gh-issue: 101282
.. nonce: FvRARb
.. section: Build

BOLT optimization is now applied to the libpython shared library if building
a shared library. BOLT instrumentation and application settings can now be
influenced via the ``BOLT_INSTRUMENT_FLAGS`` and ``BOLT_APPLY_FLAGS``
configure variables.

..

.. date: 2023-05-15-09-34-08
.. gh-issue: 99017
.. nonce: nToOQu
.. section: Build

``PYTHON_FOR_REGEN`` now require Python 3.10 or newer.

..

.. date: 2023-05-14-19-00-19
.. gh-issue: 104490
.. nonce: 1tA4AF
.. section: Build

Define ``.PHONY`` / virtual make targets consistently and properly.

..

.. date: 2023-05-04-10-56-14
.. gh-issue: 104106
.. nonce: -W9BJS
.. section: Build

Add gcc fallback of mkfifoat/mknodat for macOS. Patch by Donghee Na.

..

.. date: 2023-04-14-10-24-37
.. gh-issue: 103532
.. nonce: H1djkd
.. section: Build

The ``TKINTER_PROTECT_LOADTK`` macro is no longer defined or used in the
``_tkinter`` module.  It was previously only defined when building against
Tk 8.4.13 and older, but Tk older than 8.5.12 has been unsupported since
gh-issue-91152.

..

.. date: 2023-02-11-05-31-05
.. gh-issue: 99069
.. nonce: X4LDvY
.. section: Build

Extended workaround defining ``static_assert`` when missing from the libc
headers to all clang and gcc builds. In particular, this fixes building on
macOS <= 10.10.

..

.. date: 2022-12-18-07-24-44
.. gh-issue: 100220
.. nonce: BgSV7C
.. section: Build

Changed the default value of the ``SHELL`` Makefile variable from
``/bin/sh`` to ``/bin/sh -e`` to ensure that complex recipes correctly fail
after an error. Previously, ``make install`` could fail to install some
files and yet return a successful result.

..

.. date: 2022-06-20-15-15-11
.. gh-issue: 90656
.. nonce: kFBbKe
.. section: Build

Add platform triplets for 64-bit LoongArch:

* loongarch64-linux-gnusf
* loongarch64-linux-gnuf32
* loongarch64-linux-gnu

Patch by Zhang Na.

..

.. date: 2023-05-18-22-46-03
.. gh-issue: 104623
.. nonce: HJZhm1
.. section: Windows

Update Windows installer to use SQLite 3.42.0.

..

.. date: 2023-04-24-15-51-11
.. gh-issue: 82814
.. nonce: GI3UkZ
.. section: Windows

Fix a potential ``[Errno 13] Permission denied`` when using
:func:`shutil.copystat` within Windows Subsystem for Linux (WSL) on a
mounted filesystem by adding ``errno.EACCES`` to the list of ignored errors
within the internal implementation.

..

.. date: 2023-04-12-10-49-21
.. gh-issue: 103088
.. nonce: Yjj-qJ
.. section: Windows

Fix virtual environment :file:`activate` script having incorrect line
endings for Cygwin.

..

.. date: 2023-04-11-09-22-22
.. gh-issue: 103088
.. nonce: 6AJEuR
.. section: Windows

Fixes venvs not working in bash on Windows across different disks

..

.. date: 2023-03-24-11-25-28
.. gh-issue: 102997
.. nonce: dredy2
.. section: Windows

Update Windows installer to use SQLite 3.41.2.

..

.. date: 2023-03-18-21-38-00
.. gh-issue: 88013
.. nonce: Z3loxC
.. section: Windows

Fixed a bug where :exc:`TypeError` was raised when calling
:func:`ntpath.realpath` with a bytes parameter in some cases.

..

.. date: 2023-05-21-23-54-52
.. gh-issue: 99834
.. nonce: 6ANPts
.. section: macOS

Update macOS installer to Tcl/Tk 8.6.13.

..

.. date: 2023-05-18-22-31-49
.. gh-issue: 104623
.. nonce: 6h7Xfx
.. section: macOS

Update macOS installer to SQLite 3.42.0.

..

.. date: 2023-05-18-08-52-04
.. gh-issue: 103545
.. nonce: pi5k2N
.. section: macOS

Add ``os.PRIO_DARWIN_THREAD``, ``os.PRIO_DARWIN_PROCESS``,
``os.PRIO_DARWIN_BG`` and ``os.PRIO_DARWIN_NONUI``. These can be used with
``os.setpriority`` to run the process at a lower priority and make use of
the efficiency cores on Apple Silicon systems.

..

.. date: 2023-05-04-21-47-59
.. gh-issue: 104180
.. nonce: lEJCwd
.. section: macOS

Support reading SOCKS proxy configuration from macOS System Configuration.
Patch by Sam Schott.

..

.. date: 2023-04-24-18-37-48
.. gh-issue: 60436
.. nonce: in-IyF
.. section: macOS

update curses textbox to additionally handle backspace using the
``curses.ascii.DEL`` key press.

..

.. date: 2023-03-24-11-20-47
.. gh-issue: 102997
.. nonce: ZgQkbq
.. section: macOS

Update macOS installer to SQLite 3.41.2.

..

.. date: 2023-05-17-17-32-21
.. gh-issue: 104499
.. nonce: hNeqV4
.. section: IDLE

Fix completions for Tk Aqua 8.7 (currently blank).

..

.. date: 2023-05-17-15-11-11
.. gh-issue: 104496
.. nonce: wjav-y
.. section: IDLE

About prints both tcl and tk versions if different (expected someday).

..

.. date: 2023-04-30-20-01-18
.. gh-issue: 88496
.. nonce: y65vUb
.. section: IDLE

Fix IDLE test hang on macOS.

..

.. date: 2023-05-11-15-12-11
.. gh-issue: 104389
.. nonce: EiOhB3
.. section: Tools/Demos

Argument Clinic C converters now accept the ``unused`` keyword, for wrapping
a parameter with :c:macro:`Py_UNUSED`. Patch by Erlend E. Aasland.

..

.. date: 2023-05-18-20-53-05
.. gh-issue: 101291
.. nonce: ZBh9aR
.. section: C API

Added unstable C API for extracting the value of "compact" integers:
:c:func:`PyUnstable_Long_IsCompact` and
:c:func:`PyUnstable_Long_CompactValue`.

..

.. date: 2023-05-02-21-05-54
.. gh-issue: 104109
.. nonce: 0tnDZV
.. section: C API

We've added ``Py_NewInterpreterFromConfig()`` and ``PyInterpreterConfig`` to
the public C-API (but not the stable ABI; not yet at least).  The new
function may be used to create a new interpreter with various features
configured.  The function was added to support PEP 684 (per-interpreter
GIL).

..

.. date: 2023-04-28-18-04-38
.. gh-issue: 103968
.. nonce: EnVvOx
.. section: C API

:c:func:`PyType_FromSpec` and its variants now allow creating classes whose
metaclass overrides :c:member:`~PyTypeObject.tp_new`. The ``tp_new`` is
ignored. This behavior is deprecated and will be disallowed in 3.14+. The
new :c:func:`PyType_FromMetaclass` already disallows it.

..

.. date: 2023-04-24-10-31-59
.. gh-issue: 103743
.. nonce: 2xYA1K
.. section: C API

Add :c:func:`PyUnstable_Object_GC_NewWithExtraData` function that can be
used to allocate additional memory after an object for data not managed by
Python.

..

.. date: 2023-04-14-23-05-52
.. gh-issue: 103295
.. nonce: GRHY1Z
.. section: C API

Introduced :c:func:`PyUnstable_WritePerfMapEntry`,
:c:func:`PyUnstable_PerfMapState_Init` and
:c:func:`PyUnstable_PerfMapState_Fini`. These allow extension modules (JIT
compilers in particular) to write to perf-map files in a thread safe manner.
The :doc:`../howto/perf_profiling` also uses these APIs to write entries in
the perf-map file.

..

.. date: 2023-04-13-16-54-00
.. gh-issue: 103509
.. nonce: A26Qu8
.. section: C API

Added C API for extending types whose instance memory layout is opaque:
:c:member:`PyType_Spec.basicsize` can now be zero or negative,
:c:func:`PyObject_GetTypeData` can be used to get subclass-specific data,
and :c:macro:`Py_TPFLAGS_ITEMS_AT_END` can be used to safely extend
variable-size objects. See :pep:`697` for details.

..

.. date: 2023-03-28-12-31-51
.. gh-issue: 103091
.. nonce: CzZyaZ
.. section: C API

Add a new C-API function to eagerly assign a version tag to a PyTypeObject:
``PyUnstable_Type_AssignVersionTag()``.

..

.. date: 2023-02-09-23-09-29
.. gh-issue: 101408
.. nonce: _paFIF
.. section: C API

:c:macro:`PyObject_GC_Resize` should calculate preheader size if needed.
Patch by Donghee Na.

..

.. date: 2022-10-29-10-13-20
.. gh-issue: 98836
.. nonce: Cy5h_z
.. section: C API

Add support of more formatting options (left aligning, octals, uppercase
hexadecimals, :c:type:`intmax_t`, :c:type:`ptrdiff_t`, :c:type:`wchar_t` C
strings, variable width and precision) in :c:func:`PyUnicode_FromFormat` and
:c:func:`PyUnicode_FromFormatV`.

..

.. date: 2022-09-15-15-21-34
.. gh-issue: 96803
.. nonce: ynBKIS
.. section: C API

Add unstable C-API functions to get the code object, lasti and line number
from the internal ``_PyInterpreterFrame`` in the limited API. The functions
are:

* ``PyCodeObject * PyUnstable_InterpreterFrame_GetCode(struct _PyInterpreterFrame *frame)``
* ``int PyUnstable_InterpreterFrame_GetLasti(struct _PyInterpreterFrame *frame)``
* ``int PyUnstable_InterpreterFrame_GetLine(struct _PyInterpreterFrame *frame)``