3.14.0b1 - Cpython — ContextQMD

.. date: 2025-04-25-13-34-27 .. gh-issue: 132930 .. nonce: 6MJumW .. release date: 2025-05-06 .. section: Windows

Marks the installer for Windows as deprecated and updates documentation to cover the new Python install manager.

.. date: 2025-03-27-16-22-58 .. gh-issue: 127405 .. nonce: aASs2Z .. section: Windows

Add ABIFLAGS to :func:sysconfig.get_config_vars on Windows. Patch by Xuehai Pan.

.. date: 2025-03-10-08-19-22 .. gh-issue: 130453 .. nonce: 9B0x8k .. section: Tools/Demos

Allow passing multiple keyword arguments with the same function name in :program:pygettext.

.. date: 2025-02-16-19-00-00 .. gh-issue: 130195 .. nonce: 19274 .. section: Tools/Demos

Add warning messages when :program:pygettext unimplemented -a/--extract-all option is called.

.. date: 2025-04-29-14-56-37 .. gh-issue: 133131 .. nonce: 1pchjl .. section: Tests

The iOS testbed will now select the most recently released "SE-class" device for testing if a device isn't explicitly specified.

.. date: 2025-04-23-12-40-27 .. gh-issue: 91048 .. nonce: WJQCdV .. section: Tests

Add ability to externally inspect all pending asyncio tasks, even if no task is currently entered on the event loop.

.. date: 2025-04-23-02-23-37 .. gh-issue: 109981 .. nonce: IX3k8p .. section: Tests

The test helper that counts the list of open file descriptors now uses the optimised /dev/fd approach on all Apple platforms, not just macOS. This avoids crashes caused by guarded file descriptors.

.. date: 2025-04-18-14-00-38 .. gh-issue: 132678 .. nonce: j_ZKf2 .. section: Tests

Add --prioritize to -m test. This option allows the user to specify which selected tests should execute first, even if the order is otherwise randomized. This is particularly useful for tests that run the longest.

.. date: 2025-03-17-19-47-27 .. gh-issue: 131290 .. nonce: NyCIXR .. section: Tests

Tests in :file:Lib/test can now be correctly executed as standalone scripts.

.. date: 2024-02-18-02-53-25 .. gh-issue: 115322 .. nonce: Um2Sjx .. section: Security

The underlying extension modules behind :mod:readline:, :mod:subprocess, and :mod:ctypes now raise audit events on previously uncovered code paths that could lead to file system access related to C function calling and external binary execution. The ctypes.call_function audit hook has also been fixed to use an unsigned value for its function pointer.

.. date: 2025-05-06-00-10-10 .. gh-issue: 133490 .. nonce: Ubrppz .. section: Library

Add color support to PDB in remote mode.

.. date: 2025-05-04-16-37-28 .. gh-issue: 132493 .. nonce: 5yjZ75 .. section: Library

Avoid eagerly evaluating annotations in functions decorated with :func:reprlib.recursive_repr.

.. date: 2025-05-04-16-00-01 .. gh-issue: 130645 .. nonce: yNwKue .. section: Library

Add color to stdlib argparse CLIs. Patch by Hugo van Kemenade.

.. date: 2025-05-04-15-39-25 .. gh-issue: 119180 .. nonce: avZ3Hm .. section: Library

Make :func:annotationlib.get_annotations succeed with the FORWARDREF format if evaluating the annotations throws an exception other than :exc:NameError or :exc:AttributeError.

.. date: 2025-05-04-13-46-20 .. gh-issue: 133351 .. nonce: YsZls1 .. section: Library

Fix remote PDB to correctly request tab completions for Python expressions from the server when completing a continuation line of a multi-line Python block.

.. date: 2025-05-04-13-40-05 .. gh-issue: 133367 .. nonce: E5nl2u .. section: Library

Add the --feature-version, --optimize, and --show-empty options to the :mod:ast command-line interface. Patch by Semyon Moroz.

.. date: 2025-05-03-21-55-33 .. gh-issue: 133363 .. nonce: PTLnRP .. section: Library

The :class:cmd.Cmd class has been fixed to reliably call the completedefault method whenever the do_shell method is not defined and tab completion is requested for a line beginning with !.

.. date: 2025-05-03-18-48-54 .. gh-issue: 113081 .. nonce: JsLJ1X .. section: Library

Highlight syntax on source code in :mod:pdb.

.. date: 2025-05-03-16-04-04 .. gh-issue: 133349 .. nonce: kAhJDY .. section: Library

Introduced auto-indent in :mod:pdb multi-line input.

.. date: 2025-05-03-13-19-22 .. gh-issue: 133306 .. nonce: ustKV3 .. section: Library

Use \z instead of \Z in :func:fnmatch.translate and :func:glob.translate.

.. date: 2025-05-02-21-35-03 .. gh-issue: 133306 .. nonce: -vBye5 .. section: Library

Support \z as a synonym for \Z in :mod:regular expressions <re>.

.. date: 2025-05-02-17-23-41 .. gh-issue: 133300 .. nonce: oAh1P2 .. section: Library

Make :class:argparse.ArgumentParser's suggest_on_error a keyword-only parameter. Patch by Hugo van Kemenade.

.. date: 2025-05-02-13-16-44 .. gh-issue: 133290 .. nonce: R5WrLM .. section: Library

Fix attribute caching issue when setting :attr:ctypes._Pointer._type_ in the undocumented and deprecated :func:!ctypes.SetPointerType function and the undocumented :meth:!set_type method.

.. date: 2025-05-01-18-32-44 .. gh-issue: 133223 .. nonce: KE_T5f .. section: Library

When PDB is attached to a remote process, do a better job of intercepting Ctrl+C and forwarding it to the remote process.

.. date: 2025-04-29-23-20-52 .. gh-issue: 133153 .. nonce: M-w9yC .. section: Library

Do not complete :mod:pdb commands in interact mode of :mod:pdb.

.. date: 2025-04-29-13-40-05 .. gh-issue: 133139 .. nonce: 9yCcC2 .. section: Library

Add the :func:curses.assume_default_colors function, a refinement of the :func:curses.use_default_colors function which allows to change the color pair 0.

.. date: 2025-04-29-02-23-04 .. gh-issue: 133089 .. nonce: 8Jy1ZS .. section: Library

Use original timeout value for :exc:subprocess.TimeoutExpired when the func :meth:subprocess.run is called with a timeout instead of sometimes a confusing partial remaining time out value used internally on the final wait().

.. date: 2025-04-27-15-21-05 .. gh-issue: 133036 .. nonce: HCNYA7 .. section: Library

:func:codecs.open is now deprecated. Use :func:open instead. Contributed by Inada Naoki.

.. date: 2025-04-26-17-41-20 .. gh-issue: 132987 .. nonce: xxBCqg .. section: Library

Many builtin and extension functions which accept an unsigned integer argument, now use :meth:~object.__index__ if available.

.. date: 2025-04-26-15-43-23 .. gh-issue: 124703 .. nonce: jc5auS .. section: Library

Set return code to 1 when aborting process from :mod:pdb.

.. date: 2025-04-26-14-44-21 .. gh-issue: 133005 .. nonce: y4SRfk .. section: Library

Support passing preset option to :func:tarfile.open when using 'w|xz' mode.

.. date: 2025-04-26-12-25-42 .. gh-issue: 115032 .. nonce: jnM2Co .. section: Library

Support for custom logging handlers with the strm argument is deprecated and scheduled for removal in Python 3.16. Define handlers with the stream argument instead. Patch by Mariusz Felisiak.

.. date: 2025-04-26-10-57-15 .. gh-issue: 132991 .. nonce: ekkqdt .. section: Library

Add :data:!socket.IP_FREEBIND constant on Linux 2.4 and later.

.. date: 2025-04-26-10-54-38 .. gh-issue: 132995 .. nonce: JuDF9p .. section: Library

Bump the version of pip bundled in ensurepip to version 25.1.1

.. date: 2025-04-25-21-41-45 .. gh-issue: 132933 .. nonce: yO3ySJ .. section: Library

The zipapp module now applies the filter when creating the list of files to add, rather than waiting until the file is being added to the archive.

.. date: 2025-04-25-16-20-49 .. gh-issue: 121249 .. nonce: uue2nK .. section: Library

Always support the :c:expr:float complex and :c:expr:double complex C types in the :mod:struct module. Patch by Sergey B Kirpichev.

.. date: 2025-04-25-12-55-06 .. gh-issue: 132915 .. nonce: XuKCXn .. section: Library

:func:fcntl.fcntl and :func:fcntl.ioctl can now detect a buffer overflow and raise :exc:SystemError. The stack and memory can be corrupted in such case, so treat this error as fatal.

.. date: 2025-04-25-10-51-00 .. gh-issue: 132017 .. nonce: SIGCONT1 .. section: Library

Fix error when pyrepl is suspended, then resumed and terminated.

.. date: 2025-04-24-21-22-46 .. gh-issue: 132893 .. nonce: KFuxZ2 .. section: Library

Improved :meth:statistics.NormalDist.cdf accuracy for inputs smaller than the mean.

.. date: 2025-04-24-18-07-49 .. gh-issue: 130328 .. nonce: z7CN8z .. section: Library

Speedup pasting in PyREPL on Windows. Fix by Chris Eibl.

.. date: 2025-04-24-09-10-04 .. gh-issue: 132882 .. nonce: 6zoyp5 .. section: Library

Fix copying of :class:typing.Union objects containing objects that do not support the | operator.

.. date: 2025-04-24-01-03-40 .. gh-issue: 93696 .. nonce: kM-MBp .. section: Library

Fixed the breakpoint display error for frozen modules in :mod:pdb.

.. date: 2025-04-23-18-35-09 .. gh-issue: 129965 .. nonce: nj7Fx2 .. section: Library

Add MIME types for .7z, .apk, .deb, .glb, .gltf, .gz, .m4v, .php, .rar, .rpm, .stl and .wmv. Patch by Hugo van Kemenade.

.. date: 2025-04-23-14-50-45 .. gh-issue: 132742 .. nonce: PB6B7F .. section: Library

:func:fcntl.fcntl now supports arbitrary :term:bytes-like objects <bytes-like object>, not only :class:bytes. :func:fcntl.ioctl now automatically retries system calls failing with EINTR and releases the GIL during a system call even for large bytes-like object.

.. date: 2025-04-22-19-45-46 .. gh-issue: 132451 .. nonce: eIzMvE .. section: Library

The CLI for the PDB debugger now accepts a -p PID argument to allow attaching to a running process. The process must be running the same version of Python as the one running PDB.

.. date: 2025-04-22-16-35-37 .. gh-issue: 125618 .. nonce: PEocn3 .. section: Library

Add a format parameter to :meth:annotationlib.ForwardRef.evaluate. Evaluating annotations in the FORWARDREF format now succeeds in more cases that would previously have raised an exception.

.. date: 2025-04-22-13-42-12 .. gh-issue: 132805 .. nonce: r-dhmJ .. section: Library

Fix incorrect handling of nested non-constant values in the FORWARDREF format in :mod:annotationlib.

.. date: 2025-04-19-19-58-27 .. gh-issue: 132734 .. nonce: S6F9Cs .. section: Library

Add new constants for Bluetooth :mod:sockets <socket>.

.. date: 2025-04-18-14-34-43 .. gh-issue: 132673 .. nonce: 0sliCv .. section: Library

Fix :exc:AssertionError raised on :class:ctypes.Structure with _align_ = 0 and _fields_ = [].

.. date: 2025-04-18-10-00-09 .. gh-issue: 132578 .. nonce: ruNvF- .. section: Library

Rename the threading.Thread._handle field to avoid shadowing methods defined on subclasses of threading.Thread.

.. date: 2025-04-16-11-44-56 .. gh-issue: 132561 .. nonce: ekkDPE .. section: Library

Fix the public locked method of multiprocessing.SemLock class. Also adding 2 tests for the derivated :class:multiprocessing.Lock and :class:multiprocessing.RLock classes.

.. date: 2025-04-16-01-41-34 .. gh-issue: 121468 .. nonce: rxgE1z .. section: Library

Add :func:pdb.set_trace_async function to support :keyword:await statements in :mod:pdb.

.. date: 2025-04-15-08-39-14 .. gh-issue: 132493 .. nonce: V0gLkU .. section: Library

:class:typing.Protocol now uses :func:annotationlib.get_annotations when checking whether or not an instance implements the protocol with :func:isinstance. This enables support for isinstance checks against classes with deferred annotations.

.. date: 2025-04-15-03-20-00 .. gh-issue: 132536 .. nonce: i5Pvof .. section: Library

Do not disable :monitoring-event:PY_THROW event in :mod:bdb because it can't be disabled.

.. date: 2025-04-14-23-00-00 .. gh-issue: 132527 .. nonce: kTi8T7 .. section: Library

Include the valid typecode 'w' in the error message when an invalid typecode is passed to :class:array.array.

.. date: 2025-04-14-20-38-43 .. gh-issue: 132099 .. nonce: 0l0LlK .. section: Library

The Bluetooth socket with the :data:~socket.BTPROTO_HCI protocol on Linux now accepts an address in the format of an integer device_id, not only a tuple (device_id,).

.. date: 2025-04-14-17-24-50 .. gh-issue: 81793 .. nonce: OhRTTT .. section: Library

Fix :func:os.link on platforms (like Linux) where the system :c:func:!link function does not follow symlinks. On Linux, it now follows symlinks by default or if follow_symlinks=True is specified. On Windows, it now raises an error if follow_symlinks=True is passed. On macOS, it now raises an error if follow_symlinks=False is passed and the system :c:func:!linkat function is not available at runtime.

.. date: 2025-04-13-21-35-50 .. gh-issue: 132493 .. nonce: 5SAQJn .. section: Library

Support creation of :class:typing.Protocol classes with annotations that cannot be resolved at class creation time.

.. date: 2025-04-13-21-22-37 .. gh-issue: 132491 .. nonce: jJfT4e .. section: Library

Rename annotationlib.value_to_string to :func:annotationlib.type_repr and provide better handling for function objects.

.. date: 2025-04-13-21-11-11 .. gh-issue: 132426 .. nonce: SZno1d .. section: Library

Add :func:annotationlib.get_annotate_from_class_namespace as a helper for accessing annotations in metaclasses, and remove annotationlib.get_annotate_function.

.. date: 2025-04-13-19-17-14 .. gh-issue: 70145 .. nonce: nJ2MKg .. section: Library

Add support for channels in Bluetooth HCI protocol (:const:~socket.BTPROTO_HCI).

.. date: 2025-04-12-19-42-51 .. gh-issue: 131913 .. nonce: twOx7K .. section: Library

Add a shortcut function :func:multiprocessing.Process.interrupt alongside the existing :func:multiprocessing.Process.terminate and :func:multiprocessing.Process.kill for an improved control over child process termination.

.. date: 2025-04-12-16-29-42 .. gh-issue: 132439 .. nonce: 3twrU6 .. section: Library

Fix PyREPL on Windows: characters entered via AltGr are swallowed. Patch by Chris Eibl.

.. date: 2025-04-12-12-59-51 .. gh-issue: 132429 .. nonce: OEIdlW .. section: Library

Fix support of Bluetooth sockets on NetBSD and DragonFly BSD. Add support for cid and bdaddr_type in the BTPROTO_L2CAP address on FreeBSD. Return cid in getsockname() for BTPROTO_L2CAP if it is not zero.

.. date: 2025-04-12-09-30-24 .. gh-issue: 132106 .. nonce: OxUds3 .. section: Library

:meth:QueueListener.start <logging.handlers.QueueListener.start> now raises a :exc:RuntimeError if the listener is already started.

.. date: 2025-04-11-21-48-49 .. gh-issue: 132417 .. nonce: uILGdS .. section: Library

Fix a NULL pointer dereference when a C function called using :mod:ctypes with restype :class:~ctypes.py_object returns NULL.

.. date: 2025-04-11-12-41-47 .. gh-issue: 132385 .. nonce: 86HoA7 .. section: Library

Fix instance error suggestions trigger potential exceptions in :meth:object.__getattr__ in :mod:traceback.

.. date: 2025-04-10-21-43-04 .. gh-issue: 125866 .. nonce: EZ9X8D .. section: Library

Add optional add_scheme argument to :func:urllib.request.pathname2url; when set to true, a complete URL is returned. Likewise add optional require_scheme argument to :func:~urllib.request.url2pathname; when set to true, a complete URL is accepted.

.. date: 2025-04-10-13-06-42 .. gh-issue: 132308 .. nonce: 1js5SI .. section: Library

A :class:traceback.TracebackException now correctly renders the __context__ and __cause__ attributes from :ref:falsey <truth> :class:Exception, and the exceptions attribute from falsey :class:ExceptionGroup.

.. date: 2025-04-09-19-07-22 .. gh-issue: 130645 .. nonce: cVfE1X .. section: Library

Add colour to :mod:argparse help output. Patch by Hugo van Kemenade.

.. date: 2025-04-08-14-50-39 .. gh-issue: 127495 .. nonce: Q0V0bS .. section: Library

In PyREPL, append a new entry to the PYTHON_HISTORY file after every statement. This should preserve command-line history after interpreter is terminated. Patch by Sergey B Kirpichev.

.. date: 2025-04-08-10-45-22 .. gh-issue: 129463 .. nonce: b1qEP3 .. section: Library

Comparison of :class:annotationlib.ForwardRef objects no longer uses the internal __code__ and __ast_node__ attributes, which are used as caches.

.. date: 2025-04-08-01-55-11 .. gh-issue: 132250 .. nonce: APBFCw .. section: Library

Fixed the :exc:SystemError in :mod:!cProfile when locating the actual C function of a method raises an exception.

.. date: 2025-04-06-21-17-14 .. gh-issue: 132064 .. nonce: ktPwDM .. section: Library

:func:annotationlib.get_annotations now uses the __annotate__ attribute if it is present, even if __annotations__ is not present. Additionally, the function now raises a :py:exc:TypeError if it is passed an object that does not have any annotatins.

.. date: 2025-04-06-14-34-29 .. gh-issue: 130664 .. nonce: JF2r-U .. section: Library

Support the '_' digit separator in formatting of the integral part of :class:~decimal.Decimal's. Patch by Sergey B Kirpichev.

.. date: 2025-04-05-16-05-34 .. gh-issue: 131952 .. nonce: HX6gCX .. section: Library

Add color output to the :program:json CLI. Patch by Tomas Roun.

.. date: 2025-04-05-15-05-09 .. gh-issue: 132063 .. nonce: KHnslU .. section: Library

Prevent exceptions that evaluate as falsey (namely, when their __bool__ method returns False or their __len__ method returns 0) from being ignored by :class:concurrent.futures.ProcessPoolExecutor and :class:concurrent.futures.ThreadPoolExecutor.

.. date: 2025-04-05-02-22-49 .. gh-issue: 132106 .. nonce: XMjhQJ .. section: Library

:class:logging.handlers.QueueListener now implements the context manager protocol, allowing it to be used in a :keyword:with statement.

.. date: 2025-04-03-20-28-54 .. gh-issue: 132054 .. nonce: c1nlOx .. section: Library

The application/yaml mime type (:rfc:9512) is now supported by :mod:mimetypes. Patch by Sasha "Nelie" Chernykh and Hugo van Kemenade.

.. date: 2025-04-03-17-19-42 .. gh-issue: 119605 .. nonce: c7QXAA .. section: Library

Respect follow_wrapped for :meth:!__init__ and :meth:!__new__ methods when getting the class signature for a class with :func:inspect.signature. Preserve class signature after wrapping with :func:warnings.deprecated. Patch by Xuehai Pan.

.. date: 2025-04-03-00-56-48 .. gh-issue: 118761 .. nonce: Vb0S1B .. section: Library

Improve import times by up to 33x for the :mod:shlex module, and improve the performance of :func:shlex.quote by up to 12x. Patch by Adam Turner.

.. date: 2025-04-01-18-24-58 .. gh-issue: 85302 .. nonce: 7knfUf .. section: Library

Add support for :data:~socket.BTPROTO_SCO in sockets on FreeBSD.

.. date: 2025-03-26-10-56-22 .. gh-issue: 131757 .. nonce: pFRdmN .. section: Library

Make :func:functools.lru_cache call the cached function unlocked to allow concurrency.

.. date: 2025-03-23-11-33-09 .. gh-issue: 131423 .. nonce: bQlcEb .. section: Library

:mod:ssl can show descriptions for errors added in OpenSSL 3.4.1. Patch by Bénédikt Tran.

.. date: 2025-03-21-21-24-36 .. gh-issue: 131434 .. nonce: BPkyyh .. section: Library

Improve error reporting for incorrect format in :func:time.strptime.

.. date: 2025-03-21-17-34-27 .. gh-issue: 131524 .. nonce: Vj1pO_ .. section: Library

Add help message to :mod:platform command-line interface. Contributed by Harry Lees.

.. date: 2025-03-17-23-07-57 .. gh-issue: 100926 .. nonce: B8gcbz .. section: Library

Move :func:ctypes.POINTER types cache from a global internal cache (_pointer_type_cache) to the :attr:ctypes._CData.__pointer_type__ attribute of the corresponding :mod:ctypes types. This will stop the cache from growing without limits in some situations.

.. date: 2025-03-16-17-40-00 .. gh-issue: 85702 .. nonce: qudq12 .. section: Library

If zoneinfo._common.load_tzdata is given a package without a resource a ZoneInfoNotFoundError is raised rather than a :exc:IsADirectoryError.

.. date: 2025-03-14-14-18-49 .. gh-issue: 123471 .. nonce: sduBKk .. section: Library

Make concurrent iterations over :class:itertools.repeat safe under free-threading.

.. date: 2025-03-11-21-08-46 .. gh-issue: 131127 .. nonce: whcVdY .. section: Library

Systems using LibreSSL now successfully build.

.. date: 2025-03-09-10-37-00 .. gh-issue: 89157 .. nonce: qg3r138 .. section: Library

Make the pure Python implementation of :func:datetime.date.fromisoformat, only accept ASCII strings for consistency with the C implementation.

.. date: 2025-03-07-17-47-32 .. gh-issue: 130941 .. nonce: 7_GvhW .. section: Library

Fix :class:configparser.ConfigParser parsing empty interpolation with allow_no_value set to True.

.. date: 2025-03-01-15-00-00 .. gh-issue: 110067 .. nonce: 1ad3as .. section: Library

Make :mod:heapq max-heap functions :func:heapq.heapify_max, :func:heapq.heappush_max, :func:heapq.heappop_max, and :func:heapq.heapreplace_max public. Previous underscored naming is kept for backwards compatibility. Additionally, the missing function :func:heapq.heappushpop_max has been added to both the C and Python implementations.

.. date: 2025-03-01-12-37-08 .. gh-issue: 129098 .. nonce: eJ2-6L .. section: Library

Fix REPL traceback reporting when using :func:compile with an inexisting file. Patch by Bénédikt Tran.

.. date: 2025-02-27-14-25-01 .. gh-issue: 130631 .. nonce: dmZcZM .. section: Library

:func:!http.cookiejar.join_header_words is now more similar to the original Perl version. It now quotes the same set of characters and always quote values that end with "\n".

.. date: 2025-02-24-12-22-51 .. gh-issue: 130482 .. nonce: p2DrrL .. section: Library

Add ability to specify name for :class:!tkinter.OptionMenu and :class:!tkinter.ttk.OptionMenu.

.. date: 2025-02-24-07-08-11 .. gh-issue: 77065 .. nonce: 8uW0Wf .. section: Library

Add keyword-only optional argument echo_char for :meth:getpass.getpass for optional visual keyboard feedback support. Patch by Semyon Moroz.

.. date: 2025-02-22-13-07-06 .. gh-issue: 130317 .. nonce: tnxd0I .. section: Library

Fix :c:func:PyFloat_Pack2 and :c:func:PyFloat_Unpack2 for NaN's with payload. This corrects round-trip for :func:struct.unpack and :func:struct.pack in case of the IEEE 754 binary16 "half precision" type. Patch by Sergey B Kirpichev.

.. date: 2025-02-21-15-46-43 .. gh-issue: 130402 .. nonce: Rwu_KK .. section: Library

Joining running daemon threads during interpreter shutdown now raises :exc:PythonFinalizationError.

.. date: 2025-02-16-06-25-01 .. gh-issue: 130167 .. nonce: kUg7Rc .. section: Library

Improve speed of :func:difflib.IS_LINE_JUNK. Patch by Semyon Moroz.

.. date: 2025-02-12-16-37-34 .. gh-issue: 101410 .. nonce: 0GInct .. section: Library

Added more detailed messages for domain errors in the :mod:math module.

.. date: 2025-02-11-10-22-11 .. gh-issue: 128384 .. nonce: jyWEkA .. section: Library

Make :class:warnings.catch_warnings use a context variable for holding the warning filtering state if the :data:sys.flags.context_aware_warnings flag is set to true. This makes using the context manager thread-safe in multi-threaded programs. The flag is true by default in free-threaded builds and is otherwise false. The value of the flag can be overridden by the :option:-X context_aware_warnings <-X> command-line option or by the :envvar:PYTHON_CONTEXT_AWARE_WARNINGS environment variable.

.. date: 2025-02-06-11-23-51 .. gh-issue: 129719 .. nonce: Of6rvb .. section: Library

Fix missing :data:!socket.CAN_RAW_ERR_FILTER constant in the socket module on Linux systems. It was missing since Python 3.11.

.. date: 2025-01-21-11-48-19 .. gh-issue: 129027 .. nonce: w0vxzZ .. section: Library

Raise :exc:DeprecationWarning for :func:sys._clear_type_cache. This function was deprecated in Python 3.13 but it didn't raise a runtime warning.

.. date: 2024-12-28-11-01-36 .. gh-issue: 128307 .. nonce: BRCYTA .. section: Library

Add eager_start keyword argument to :meth:asyncio.loop.create_task

.. date: 2024-12-21-13-31-55 .. gh-issue: 127604 .. nonce: etL5mf .. section: Library

Add support for printing the C stack trace on systems that support it via :func:faulthandler.dump_c_stack or via the c_stack argument in :func:faulthandler.enable.

.. date: 2024-11-29-13-06-52 .. gh-issue: 127385 .. nonce: PErcyB .. section: Library

Add the F_DUPFD_QUERY constant to the :mod:fcntl module.

.. date: 2024-11-14-21-17-48 .. gh-issue: 126838 .. nonce: Yr5vKF .. section: Library

Add resolve_host keyword-only parameter to :func:urllib.request.url2pathname, and fix handling of file URLs with authorities.

.. date: 2024-09-18-09-15-40 .. gh-issue: 82129 .. nonce: GQwt3u .. section: Library

Fix :exc:NameError when calling :func:typing.get_type_hints on a :func:dataclasses.dataclass created by :func:dataclasses.make_dataclass with un-annotated fields.

.. date: 2024-08-02-20-01-36 .. gh-issue: 122559 .. nonce: 2JlJr3 .. section: Library

Remove :meth:!__reduce__ and :meth:!__reduce_ex__ methods that always raise :exc:TypeError in the C implementation of :class:io.FileIO, :class:io.BufferedReader, :class:io.BufferedWriter and :class:io.BufferedRandom and replace them with default :meth:!__getstate__ methods that raise :exc:!TypeError. This restores fine details of behavior of Python 3.11 and older versions.

.. date: 2024-07-23-17-08-41 .. gh-issue: 122179 .. nonce: 0jZm9h .. section: Library

:func:hashlib.file_digest now raises :exc:BlockingIOError when no data is available during non-blocking I/O. Before, it added spurious null bytes to the digest.

.. date: 2024-07-19-07-16-50 .. gh-issue: 53032 .. nonce: paXN3p .. section: Library

Expose :func:decimal.IEEEContext to support creation of contexts corresponding to the IEEE 754 (2008) decimal interchange formats. Patch by Sergey B Kirpichev.

.. date: 2024-06-07-15-03-54 .. gh-issue: 120220 .. nonce: NNxrr_ .. section: Library

Deprecate the :class:!tkinter.Variable methods :meth:!trace_variable, :meth:!trace_vdelete and :meth:!trace_vinfo. Methods :meth:!trace_add, :meth:!trace_remove and :meth:!trace_info can be used instead.

.. date: 2023-12-29-09-44-41 .. gh-issue: 113539 .. nonce: YDkv9O .. section: Library

:mod:webbrowser: Names in the :envvar:BROWSER environment variable can now refer to already registered web browsers, instead of always generating a new browser command.

This makes it possible to set :envvar:BROWSER to the value of one of the supported browsers on macOS.

.. bpo: 44172 .. date: 2021-05-18-19-12-58 .. nonce: rJ_-CI .. section: Library

Keep a reference to original :mod:curses windows in subwindows so that the original window does not get deleted before subwindows.

.. date: 2019-09-10-09-28-52 .. gh-issue: 75223 .. nonce: VyAJS9 .. section: Library

Deprecate undotted extensions in :meth:mimetypes.MimeTypes.add_type. Patch by Hugo van Kemenade.

.. date: 2024-11-08-18-07-13 .. gh-issue: 112936 .. nonce: 1Q2RcP .. section: IDLE

fix IDLE: no Shell menu item in single-process mode.

.. date: 2025-03-28-18-25-43 .. gh-issue: 107006 .. nonce: BxFijD .. section: Documentation

Move documentation and example code for :class:threading.local from its docstring to the official docs.

.. date: 2024-10-08-10-44-14 .. gh-issue: 125142 .. nonce: HVlHrs .. section: Documentation

As part of the builtin help intro text, show the keyboard shortcuts for the new, non-basic REPL (F1, F2, and F3).

.. date: 2025-05-05-15-33-35 .. gh-issue: 133336 .. nonce: miffFi .. section: Core and Builtins

:option:!-J is no longer reserved for use by Jython. Patch by Adam Turner.

.. date: 2025-05-05-12-03-46 .. gh-issue: 133261 .. nonce: bL1gqz .. section: Core and Builtins

Fix bug where the cycle GC could untrack objects in the trashcan because they looked like they were immortal. When objects are added to the trashcan, we take care to ensure they keep a mortal reference count.

.. date: 2025-05-04-19-46-14 .. gh-issue: 133346 .. nonce: nRXi4f .. section: Core and Builtins

Added experimental color theming support to the _colorize module.

.. date: 2025-05-04-14-47-26 .. gh-issue: 132917 .. nonce: DrEU1y .. section: Core and Builtins

For the free-threaded build, check the process memory usage increase before triggering a full automatic garbage collection. If the memory used has not increased 10% since the last collection then defer it.

.. date: 2025-05-03-19-04-03 .. gh-issue: 91048 .. nonce: S8QWSw .. section: Core and Builtins

Add a new python -m asyncio ps PID command-line interface to inspect asyncio tasks in a running Python process. Displays a flat table of await relationships. A variant showing a tree view is also available as python -m asyncio pstree PID. Both are useful for debugging async code. Patch by Pablo Galindo, Łukasz Langa, Yury Selivanov, and Marta Gomez Macias.

.. date: 2025-05-03-07-41-21 .. gh-issue: 133304 .. nonce: YMuSne .. section: Core and Builtins

Workaround NaN's "canonicalization" in :c:func:PyFloat_Pack4 and :c:func:PyFloat_Unpack4 on RISC-V.

.. date: 2025-05-01-11-06-29 .. gh-issue: 133197 .. nonce: BHjfh4 .. section: Core and Builtins

Improve :exc:SyntaxError error messages for incompatible string / bytes prefixes.

.. date: 2025-04-30-19-07-11 .. gh-issue: 133231 .. nonce: H9T8g_ .. section: Core and Builtins

Add new utilities of observing JIT compilation: :func:sys._jit.is_available, :func:sys._jit.is_enabled, and :func:sys._jit.is_active.

.. date: 2025-04-30-13-09-20 .. gh-issue: 133194 .. nonce: 25_G5c .. section: Library

:func:ast.parse will no longer parse new :pep:758 syntax with older feature_version passed.

.. date: 2025-04-30-00-21-54 .. gh-issue: 131798 .. nonce: D6T5_u .. section: Core and Builtins

Split CALL_LEN into several uops allowing the JIT to remove them when optimizing. Patch by Diego Russo.

.. date: 2025-04-26-18-43-31 .. gh-issue: 131798 .. nonce: FsIypo .. section: Core and Builtins

Use sym_new_type instead of sym_new_not_null for _BUILD_STRING, _BUILD_SET

.. date: 2025-04-26-17-50-47 .. gh-issue: 132942 .. nonce: aEEZvZ .. section: Core and Builtins

Fix two races in the type lookup cache. This affected the free-threaded build and could cause crashes (apparently quite difficult to trigger).

.. date: 2025-04-26-13-57-13 .. gh-issue: 131798 .. nonce: Gt8CGE .. section: Core and Builtins

Propagate the return type of _BINARY_OP_SUBSCR_TUPLE_INT in JIT. Patch by Tomas Roun

.. date: 2025-04-26-08-49-05 .. gh-issue: 132952 .. nonce: ifvP10 .. section: Core and Builtins

Speed up startup with the -S argument by importing the private _io module instead of :mod:io. This fixes a performance regression introduced earlier in Python 3.14 development and restores performance to the level of Python 3.13.

.. date: 2025-04-25-14-56-45 .. gh-issue: 131798 .. nonce: NpcKub .. section: Core and Builtins

Allow the JIT to remove int guards after _CALL_LEN by setting the return type to int. Patch by Diego Russo

.. date: 2025-04-23-20-54-17 .. gh-issue: 131798 .. nonce: XYlp09 .. section: Core and Builtins

Split CALL_TUPLE_1 into several uops allowing the JIT to remove some of them. Patch by Tomas Roun

.. date: 2025-04-23-20-42-55 .. gh-issue: 131798 .. nonce: wVQ1Gt .. section: Core and Builtins

Split CALL_STR_1 into several uops allowing the JIT to remove some of them. Patch by Tomas Roun

.. date: 2025-04-23-11-34-39 .. gh-issue: 132825 .. nonce: _yv0uL .. section: Core and Builtins

Enhance unhashable key/element error messages for :class:dict and :class:set. Patch by Victor Stinner.

.. date: 2025-04-22-19-00-03 .. gh-issue: 131591 .. nonce: CdEqBr .. section: Core and Builtins

Reset any :pep:768 remote debugging pending call in children after :func:os.fork calls.

.. date: 2025-04-22-16-38-43 .. gh-issue: 132713 .. nonce: mBWTSZ .. section: Core and Builtins

Fix repr(list) race condition: hold a strong reference to the item while calling repr(item). Patch by Victor Stinner.

.. date: 2025-04-22-15-37-05 .. gh-issue: 132661 .. nonce: XE_A42 .. section: Core and Builtins

Implement :pep:750 (Template Strings). Add new syntax for t-strings and implement new internal :class:!string.templatelib.Template and :class:!string.templatelib.Interpolation types.

.. date: 2025-04-21-09-22-15 .. gh-issue: 132479 .. nonce: CCe2sE .. section: Core and Builtins

Fix compiler crash in certain circumstances where multiple module-level annotations include comprehensions and other nested scopes.

.. date: 2025-04-21-07-39-59 .. gh-issue: 132747 .. nonce: L-cnej .. section: Core and Builtins

Fix a crash when calling :meth:~object.__get__ of a :term:method with a :const:None second argument.

.. date: 2025-04-20-10-37-39 .. gh-issue: 132744 .. nonce: ArrCp8 .. section: Core and Builtins

Certain calls now check for runaway recursion and respect the system recursion limit.

.. date: 2025-04-19-22-59-24 .. gh-issue: 132449 .. nonce: xjdw4p .. section: Core and Builtins

Syntax errors that look like misspellings of Python keywords now provide a helpful fix suggestion for the typo. Contributed by Pablo Galindo Salgado.

.. date: 2025-04-19-18-07-34 .. gh-issue: 132737 .. nonce: 9mW1il .. section: Library

Support profiling code that requires __main__, such as :mod:pickle.

.. date: 2025-04-17-16-20-03 .. gh-issue: 132639 .. nonce: zRVYU3 .. section: Core and Builtins

Added :c:func:PyLong_AsNativeBytes, :c:func:PyLong_FromNativeBytes and :c:func:PyLong_FromUnsignedNativeBytes to the limited C API.

.. date: 2025-04-17-11-40-13 .. gh-issue: 100239 .. nonce: 9RxIxY .. section: Core and Builtins

Add specialisation for BINARY_OP/SUBSCR on list and slice.

.. date: 2025-04-15-10-09-49 .. gh-issue: 132508 .. nonce: zVe3iI .. section: Core and Builtins

Uses tagged integers on the evaluation stack to represent the instruction offsets when reraising an exception. This avoids the need to box the integer which could fail in low memory conditions.

.. date: 2025-04-13-17-18-01 .. gh-issue: 124476 .. nonce: fvGfQ7 .. section: Core and Builtins

Fix decoding from the locale encoding in the C.UTF-8 locale.

.. date: 2025-04-13-10-34-27 .. gh-issue: 131927 .. nonce: otp80n .. section: Core and Builtins

Compiler warnings originating from the same module and line number are now only emitted once, matching the behaviour of warnings emitted from user code. This can also be configured with :mod:warnings filters.

.. date: 2025-04-13-01-50-40 .. gh-issue: 132457 .. nonce: 1q-1xz .. section: Core and Builtins

Make :func:staticmethod and :func:classmethod generic.

.. date: 2025-04-12-19-41-16 .. gh-issue: 131798 .. nonce: JkSocg .. section: Core and Builtins

Use sym_new_type instead of sym_new_not_null for _BUILD_LIST, _BUILD_SET, _BUILD_MAP

.. date: 2025-04-11-22-01-07 .. gh-issue: 131798 .. nonce: TTu_xH .. section: Core and Builtins

Split CALL_TYPE_1 into several uops allowing the JIT to remove some of them.

.. date: 2025-04-11-18-46-37 .. gh-issue: 132386 .. nonce: pMBFTe .. section: Core and Builtins

Fix crash when passing a dict subclass as the globals parameter to :func:exec.

.. date: 2025-04-10-10-29-45 .. gh-issue: 127682 .. nonce: X0HoGz .. section: Core and Builtins

No longer call __iter__ twice when creating and executing a generator expression. Creating a generator expression from a non-interable will raise only when the generator expression is executed. This brings the behavior of generator expressions in line with other generators.

.. date: 2025-04-09-21-51-37 .. gh-issue: 132261 .. nonce: gL8thm .. section: Core and Builtins

The internal storage for annotations and annotate functions on classes now uses different keys in the class dictionary. This eliminates various edge cases where access to the __annotate__ and __annotations__ attributes would behave unpredictably.

.. date: 2025-04-09-20-49-04 .. gh-issue: 132284 .. nonce: TxTNka .. section: Core and Builtins

Don't wrap base PyCFunction slots on class creation if not overridden.

.. date: 2025-04-09-14-05-54 .. gh-issue: 130415 .. nonce: llQtUq .. section: Core and Builtins

Improve the JIT's ability to remove unused constant and local variable loads, and fix an issue where deallocating unused values could cause JIT code to crash or behave incorrectly.

.. date: 2025-04-09-13-47-33 .. gh-issue: 126703 .. nonce: kXiQHj .. section: Core and Builtins

Fix possible use after free in cases where a method's definition has the same lifetime as its self.

.. date: 2025-04-09-12-37-31 .. gh-issue: 132286 .. nonce: 1ZdsOa .. section: Core and Builtins

Fix that :attr:type.__annotate__ was not deleted, when :attr:type.__annotations__ was deleted.

.. date: 2025-04-08-21-20-12 .. gh-issue: 131798 .. nonce: Ft9tIF .. section: Core and Builtins

Allow the JIT to remove an extra _TO_BOOL_BOOL instruction after _CONTAINS_OP_DICT by setting the return type to bool.

.. date: 2025-04-08-17-48-11 .. gh-issue: 124715 .. nonce: xxzQoD .. section: Core and Builtins

Prevents against stack overflows when calling :c:func:Py_DECREF. Third-party extension objects no longer need to use the "trashcan" mechanism, as protection is now built into the :c:func:Py_DECREF macro.

.. date: 2025-04-08-09-20-18 .. gh-issue: 131798 .. nonce: Xp1mvN .. section: Core and Builtins

Allow the JIT compiler to remove some type checks for operations on lists, tuples, dictionaries, and sets.

.. date: 2025-04-07-13-46-57 .. gh-issue: 128398 .. nonce: gJ2zIF .. section: Core and Builtins

Improve error message when an object supporting the synchronous (resp. asynchronous) context manager protocol is entered using :keyword:async with (resp. :keyword:with) instead of :keyword:with (resp. :keyword:async with). Patch by Bénédikt Tran.

.. date: 2025-04-06-13-17-10 .. gh-issue: 131798 .. nonce: uMrfha .. section: Core and Builtins

Allow the JIT to remove unicode guards after _BINARY_OP_SUBSCR_STR_INT by setting the return type to string.

.. date: 2025-03-30-19-58-14 .. gh-issue: 131878 .. nonce: uxM26H .. section: Core and Builtins

Handle uncaught exceptions in the main input loop for the new REPL.

.. date: 2025-03-30-19-49-00 .. gh-issue: 131878 .. nonce: J8_cHB .. section: Core and Builtins

Fix support of unicode characters with two or more codepoints on Windows in the new REPL.

.. date: 2025-03-28-15-06-55 .. gh-issue: 126835 .. nonce: IpcMTn .. section: Core and Builtins

Move constant folding to the peephole optimizer. Rename AST optimization related files (Python/ast_opt.c -> Python/ast_preprocess.c), structs (_PyASTOptimizeState -> _PyASTPreprocessState) and functions (_PyAST_Optimize -> _PyAST_Preprocess, _PyCompile_AstOptimize -> _PyCompile_AstPreprocess).

.. date: 2025-03-26-04-55-25 .. gh-issue: 114809 .. nonce: 8rNyT7 .. section: Core and Builtins

Add support for macOS multi-arch builds with the JIT enabled

.. date: 2025-03-21-19-03-42 .. gh-issue: 131507 .. nonce: q9fvyM .. section: Core and Builtins

PyREPL now supports syntax highlighting. Contributed by Łukasz Langa.

.. date: 2025-03-21-08-47-36 .. gh-issue: 130907 .. nonce: rGg-ge .. section: Core and Builtins

If the __annotations__ of a module object are accessed while the module is executing, return the annotations that have been defined so far, without caching them.

.. date: 2025-02-18-11-42-58 .. gh-issue: 130104 .. nonce: BOicVZ .. section: Core and Builtins

Three-argument :func:pow now try calling :meth:~object.__rpow__ if necessary. Previously it was only called in two-argument :func:!pow and the binary power operator.

.. date: 2025-02-13-05-09-31 .. gh-issue: 130070 .. nonce: C8c9gK .. section: Core and Builtins

Fixed an assertion error for :func:exec passed a string source and a non-None closure. Patch by Bartosz Sławecki.

.. date: 2025-02-13-00-14-24 .. gh-issue: 129958 .. nonce: Uj7lyY .. section: Core and Builtins

Fix a bug that was allowing newlines inconsistently in format specifiers for single-quoted f-strings. Patch by Pablo Galindo.

.. date: 2025-02-12-01-36-13 .. gh-issue: 129858 .. nonce: M-f7Gb .. section: Core and Builtins

elif statements that follow an else block now have a specific error message.

.. date: 2025-01-26-23-46-43 .. gh-issue: 69605 .. nonce: _2Qc1w .. section: Core and Builtins

Add module autocomplete to PyREPL.

.. date: 2025-01-06-10-55-41 .. gh-issue: 128555 .. nonce: tAK_AY .. section: Core and Builtins

Add the :data:sys.flags.thread_inherit_context flag.

This flag is set to true by default on the free-threaded build and false otherwise. If the flag is true, starting a new thread using :class:threading.Thread will, by default, use a copy of the :class:contextvars.Context from the caller of :meth:threading.Thread.start rather than using an empty context.
Add the :option:-X thread_inherit_context <-X> command-line option and :envvar:PYTHON_THREAD_INHERIT_CONTEXT environment variable, which set the :data:~sys.flags.thread_inherit_context flag.
Add the context keyword parameter to :class:~threading.Thread. It can be used to explicitly pass a context value to be used by a new thread.
Make the _contextvars module built-in.

.. date: 2024-09-03-15-15-51 .. gh-issue: 123539 .. nonce: RKQS0S .. section: Core and Builtins

Improve :exc:SyntaxError message for using import ... as and from ... import ... as with not a name.

.. date: 2024-07-11-12-31-29 .. gh-issue: 102567 .. nonce: weRqDn .. section: Core and Builtins

:option:-X importtime <-X> now accepts value 2, which indicates that an importtime entry should also be printed if an imported module has already been loaded. Patch by Noah Kim and Adam Turner.

.. date: 2024-03-06-22-33-33 .. gh-issue: 116436 .. nonce: y8Thkt .. section: Core and Builtins

Improve error message when :exc:TypeError occurs during :meth:dict.update

.. date: 2023-04-29-23-15-38 .. gh-issue: 103997 .. nonce: BS3uVt .. section: Core and Builtins

String arguments passed to "-c" are now automatically dedented. This allows "python -c" invocations to be indented in shell scripts without causing indentation errors. (Patch by Jon Crall and Steven Sun)

.. date: 2022-12-29-19-10-36 .. gh-issue: 89562 .. nonce: g8m8RC .. section: Library

Remove hostflags member from PySSLContext struct.

.. date: 2025-05-01-01-02-11 .. gh-issue: 133166 .. nonce: Ly9Ae2 .. section: C API

Fix regression where :c:func:PyType_GetModuleByDef returns NULL without setting :exc:TypeError when a static type is passed.

.. date: 2025-04-29-19-39-16 .. gh-issue: 133164 .. nonce: W-XTU7 .. section: C API

Add :c:func:PyUnstable_Object_IsUniqueReferencedTemporary function for determining if an object exists as a unique temporary variable on the interpreter's stack. This is a replacement for some cases where checking that :c:func:Py_REFCNT is one is no longer sufficient to determine if it's safe to modify a Python object in-place with no visible side effects.

.. date: 2025-04-29-06-27-46 .. gh-issue: 133140 .. nonce: IPGGc3 .. section: C API

Add :c:func:PyUnstable_Object_IsUniquelyReferenced as a replacement for Py_REFNCT(op) == 1 on :term:free threaded <free threading> builds of Python.

.. date: 2025-04-28-18-26-37 .. gh-issue: 131747 .. nonce: 2AiQ9n .. section: C API

On non-Windows platforms, deprecate using :attr:ctypes.Structure._pack_ to use a Windows-compatible layout on non-Windows platforms. The layout should be specified explicitly by setting :attr:ctypes.Structure._layout_ to 'ms'.

.. date: 2025-04-28-15-36-01 .. gh-issue: 128972 .. nonce: 8bZMIm .. section: C API

For non-free-threaded builds, the memory layout of :c:struct:PyASCIIObject is reverted to match Python 3.13. (Note that the structure is not part of stable ABI and so its memory layout is guaranteed to remain stable.)

.. date: 2025-04-28-13-27-48 .. gh-issue: 133079 .. nonce: DJL2sK .. section: C API

The undocumented APIs :c:macro:!Py_C_RECURSION_LIMIT and :c:member:!PyThreadState.c_recursion_remaining, added in 3.13, are removed without a deprecation period.

.. date: 2025-04-26-12-00-52 .. gh-issue: 132987 .. nonce: vykZGN .. section: C API

The k and K formats in :c:func:PyArg_Parse now support the :meth:~object.__index__ special method, like all other integer formats.

.. date: 2025-04-25-11-39-24 .. gh-issue: 132909 .. nonce: JC3n_l .. section: C API

Fix an overflow when handling the :ref:K <capi-py-buildvalue-format-K> format in :c:func:Py_BuildValue. Patch by Bénédikt Tran.

.. date: 2025-04-22-13-59-30 .. gh-issue: 132798 .. nonce: asfafhs .. section: C API

Deprecated and undocumented functions :c:func:!PyUnicode_AsEncodedObject, :c:func:!PyUnicode_AsDecodedObject, :c:func:!PyUnicode_AsEncodedUnicode and :c:func:!PyUnicode_AsDecodedUnicode are scheduled for removal in 3.15.

.. date: 2025-04-13-20-52-39 .. gh-issue: 132470 .. nonce: UqBQjN .. section: C API

Creating a :class:ctypes.CField with a byte_size that does not match the actual type size now raises a :exc:ValueError instead of crashing the interpreter.

.. date: 2025-01-08-18-55-57 .. gh-issue: 112068 .. nonce: ofI5Fl .. section: C API

[Reverted in :gh:136991] Add support of nullable arguments in :c:func:PyArg_Parse and similar functions. Adding ? after any format unit makes None be accepted as a value.

.. date: 2024-12-31-15-28-14 .. gh-issue: 50333 .. nonce: KxQUXa .. section: C API

Non-tuple sequences are deprecated as argument for the (items) format unit in :c:func:PyArg_ParseTuple and other :ref:argument parsing <arg-parsing> functions if items contains format units which store a :ref:borrowed buffer <c-arg-borrowed-buffer> or a :term:borrowed reference.

.. date: 2025-05-01-17-27-06 .. gh-issue: 113464 .. nonce: vjE5X4 .. section: Build

Use the cpython-bin-deps "externals" repository for Windows LLVM dependency management. Installing LLVM manually is no longer necessary for Windows JIT builds.

.. date: 2025-04-30-11-07-53 .. gh-issue: 133183 .. nonce: zCKUeQ .. section: Build

iOS compiler shims now include IPHONEOS_DEPLOYMENT_TARGET in target triples, ensuring that SDK version minimums are honored.

.. date: 2025-04-30-10-23-18 .. gh-issue: 133167 .. nonce: E0jrYJ .. section: Build

Fix compilation process with --enable-optimizations and --without-docstrings.

.. date: 2025-04-29-15-29-11 .. gh-issue: 133171 .. nonce: YbwbwP .. section: Build

Since free-threaded builds do not support the experimental JIT compiler, prevent these configurations from being combined.

.. date: 2025-04-20-20-07-44 .. gh-issue: 132758 .. nonce: N2a3wp .. section: Build

Fix building with tail call interpreter and pystats.

.. date: 2025-04-17-19-10-15 .. gh-issue: 132649 .. nonce: DZqGoq .. section: Build

The :file:PC\layout script now allows passing --include-tcltk on Windows ARM64.

.. date: 2025-04-08-09-11-32 .. gh-issue: 132257 .. nonce: oZWBV- .. section: Build

Change the default LTO flags on GCC to not pass -flto-partition=none, and allow parallelization of LTO. For newer GNU makes and GCC, this has a multiple factor speedup for LTO build times, with no noticeable loss in performance.

.. date: 2025-04-02-21-08-36 .. gh-issue: 132026 .. nonce: ptnR7T .. section: Build

Fix use of undefined identifiers in platform triplet detection on MIPS Linux platforms.