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diff --git a/Misc/NEWS.d/3.13.0a3.rst b/Misc/NEWS.d/3.13.0a3.rst new file mode 100644 index 0000000..95aa666 --- /dev/null +++ b/Misc/NEWS.d/3.13.0a3.rst @@ -0,0 +1,2414 @@ +.. date: 2024-01-02-19-52-23 +.. gh-issue: 113659 +.. nonce: DkmnQc +.. release date: 2024-01-17 +.. section: Security + +Skip ``.pth`` files with names starting with a dot or hidden file attribute. + +.. + +.. date: 2023-12-06-14-06-59 +.. gh-issue: 112302 +.. nonce: 3bl20f +.. section: Security + +Created a Software Bill-of-Materials document and tooling for tracking +dependencies. + +.. + +.. date: 2024-01-11-16-54-55 +.. gh-issue: 107901 +.. nonce: Td3JPI +.. section: Core and Builtins + +Compiler duplicates basic blocks that have an eval breaker check, no line +number, and multiple predecessors. + +.. + +.. date: 2024-01-11-14-03-31 +.. gh-issue: 107901 +.. nonce: U65IyC +.. section: Core and Builtins + +A jump leaving an exception handler back to normal code no longer checks the +eval breaker. + +.. + +.. date: 2024-01-11-01-28-25 +.. gh-issue: 113655 +.. nonce: Mfioxp +.. section: Core and Builtins + +Set the C recursion limit to 4000 on Windows, and 10000 on Linux/OSX. This +seems to be near the sweet spot to maintain safety, but not compromise +backwards compatibility. + +.. + +.. date: 2024-01-09-23-01-00 +.. gh-issue: 113710 +.. nonce: pe3flY +.. section: Core and Builtins + +Add typed stack effects to the interpreter DSL, along with various +instruction annotations. + +.. + +.. date: 2024-01-08-14-34-02 +.. gh-issue: 77046 +.. nonce: sDUh2d +.. section: Core and Builtins + +On Windows, file descriptors wrapping Windows handles are now created non +inheritable by default (:pep:`446`). Patch by Zackery Spytz and Victor +Stinner. + +.. + +.. date: 2024-01-08-05-36-59 +.. gh-issue: 113853 +.. nonce: lm-6_a +.. section: Core and Builtins + +Guarantee that all executors make progress. This then guarantees that tier 2 +execution always makes progress. + +.. + +.. date: 2024-01-05-21-28-48 +.. gh-issue: 113753 +.. nonce: 2HNiuq +.. section: Core and Builtins + +Fix an issue where the finalizer of ``PyAsyncGenASend`` objects might not be +called if they were allocated from a free list. + +.. + +.. date: 2024-01-05-00-49-14 +.. gh-issue: 107901 +.. nonce: 6JRrb6 +.. section: Core and Builtins + +Compiler changed so that synthetic jumps which are not at loop end no longer +check the eval breaker. + +.. + +.. date: 2024-01-04-17-15-30 +.. gh-issue: 113703 +.. nonce: Zsk0pY +.. section: Core and Builtins + +Fix a regression in the :mod:`codeop` module that was causing it to +incorrectly identify incomplete f-strings. Patch by Pablo Galindo + +.. + +.. date: 2024-01-03-12-19-37 +.. gh-issue: 89811 +.. nonce: cZOj6d +.. section: Core and Builtins + +Check for a valid ``tp_version_tag`` before performing bytecode +specializations that rely on this value being usable. + +.. + +.. date: 2024-01-02-17-22-57 +.. gh-issue: 111488 +.. nonce: EJH3Oh +.. section: Core and Builtins + +Changed error message in case of no 'in' keyword after 'for' in list +comprehensions + +.. + +.. date: 2024-01-02-11-14-29 +.. gh-issue: 113657 +.. nonce: CQo9vF +.. section: Core and Builtins + +Fix an issue that caused important instruction pointer updates to be +optimized out of tier two traces. + +.. + +.. date: 2024-01-01-23-57-24 +.. gh-issue: 113603 +.. nonce: ySwovr +.. section: Core and Builtins + +Fixed bug where a redundant NOP is not removed, causing an assertion to fail +in the compiler in debug mode. + +.. + +.. date: 2024-01-01-00-07-02 +.. gh-issue: 113602 +.. nonce: cWuTzk +.. section: Core and Builtins + +Fix an error that was causing the parser to try to overwrite existing errors +and crashing in the process. Patch by Pablo Galindo + +.. + +.. date: 2023-12-31-07-46-01 +.. gh-issue: 113486 +.. nonce: uki19C +.. section: Core and Builtins + +No longer issue spurious ``PY_UNWIND`` events for optimized calls to +classes. + +.. + +.. date: 2023-12-20-18-27-11 +.. gh-issue: 113297 +.. nonce: BZyAI_ +.. section: Core and Builtins + +Fix segfault in the compiler on with statement with 19 context managers. + +.. + +.. date: 2023-12-20-08-54-54 +.. gh-issue: 113212 +.. nonce: 62AUlw +.. section: Core and Builtins + +Improve :py:class:`super` error messages. + +.. + +.. date: 2023-12-19-22-03-43 +.. gh-issue: 111375 +.. nonce: M9vuA6 +.. section: Core and Builtins + +Only use ``NULL`` in the exception stack to indicate an exception was +handled. Patch by Carey Metcalfe. + +.. + +.. date: 2023-12-15-16-26-01 +.. gh-issue: 112215 +.. nonce: xJS6_6 +.. section: Core and Builtins + +Increase the C recursion limit by a factor of 3 for non-debug builds, except +for webassembly and s390 platforms which are unchanged. This mitigates some +regressions in 3.12 with deep recursion mixing builtin (C) and Python code. + +.. + +.. date: 2023-12-14-20-08-35 +.. gh-issue: 113054 +.. nonce: e20CtM +.. section: Core and Builtins + +Fixed bug where a redundant NOP is not removed, causing an assertion to fail +in the compiler in debug mode. + +.. + +.. date: 2023-12-13-11-45-53 +.. gh-issue: 106905 +.. nonce: 5dslTN +.. section: Core and Builtins + +Use per AST-parser state rather than global state to track recursion depth +within the AST parser to prevent potential race condition due to +simultaneous parsing. + +The issue primarily showed up in 3.11 by multithreaded users of +:func:`ast.parse`. In 3.12 a change to when garbage collection can be +triggered prevented the race condition from occurring. + +.. + +.. date: 2023-12-12-04-53-19 +.. gh-issue: 108866 +.. nonce: xbJ-9a +.. section: Core and Builtins + +Change the API and contract of ``_PyExecutorObject`` to return the +next_instr pointer, instead of the frame, and to always execute at least one +instruction. + +.. + +.. date: 2023-12-11-19-53-32 +.. gh-issue: 90350 +.. nonce: -FQy3E +.. section: Core and Builtins + +Optimize builtin functions :func:`min` and :func:`max`. + +.. + +.. date: 2023-12-11-00-50-00 +.. gh-issue: 112943 +.. nonce: RHNZie +.. section: Core and Builtins + +Correctly compute end column offsets for multiline tokens in the +:mod:`tokenize` module. Patch by Pablo Galindo + +.. + +.. date: 2023-12-07-13-19-55 +.. gh-issue: 112125 +.. nonce: 4ADN7i +.. section: Core and Builtins + +Fix None.__ne__(None) returning NotImplemented instead of False + +.. + +.. date: 2023-12-07-12-00-04 +.. gh-issue: 74616 +.. nonce: kgTGVb +.. section: Core and Builtins + +:func:`input` now raises a ValueError when output on the terminal if the +prompt contains embedded null characters instead of silently truncating it. + +.. + +.. date: 2023-12-05-20-41-58 +.. gh-issue: 112716 +.. nonce: hOcx0Y +.. section: Core and Builtins + +Fix SystemError in the ``import`` statement and in ``__reduce__()`` methods +of builtin types when ``__builtins__`` is not a dict. + +.. + +.. date: 2023-12-04-23-09-07 +.. gh-issue: 112730 +.. nonce: BXHlFa +.. section: Core and Builtins + +Use color to highlight error locations in tracebacks. Patch by Pablo Galindo + +.. + +.. date: 2023-12-03-19-34-51 +.. gh-issue: 112625 +.. nonce: QWTlwS +.. section: Core and Builtins + +Fixes a bug where a bytearray object could be cleared while iterating over +an argument in the ``bytearray.join()`` method that could result in reading +memory after it was freed. + +.. + +.. date: 2023-12-03-15-29-53 +.. gh-issue: 112660 +.. nonce: gldBvh +.. section: Core and Builtins + +Do not clear unexpected errors during formatting error messages for +ImportError and AttributeError for modules. + +.. + +.. date: 2023-12-01-19-02-21 +.. gh-issue: 105967 +.. nonce: Puq5Cn +.. section: Core and Builtins + +Workaround a bug in Apple's macOS platform zlib library where +:func:`zlib.crc32` and :func:`binascii.crc32` could produce incorrect +results on multi-gigabyte inputs. Including when using :mod:`zipfile` on +zips containing large data. + +.. + +.. date: 2023-12-01-08-16-10 +.. gh-issue: 95754 +.. nonce: ae4gwy +.. section: Core and Builtins + +Provide a better error message when accessing invalid attributes on +partially initialized modules. The origin of the module being accessed is +now included in the message to help with the common issue of shadowing other +modules. + +.. + +.. date: 2023-11-27-18-55-30 +.. gh-issue: 112217 +.. nonce: SwFLMj +.. section: Core and Builtins + +Add check for the type of ``__cause__`` returned from calling the type ``T`` +in ``raise from T``. + +.. + +.. date: 2023-11-26-21-30-11 +.. gh-issue: 111058 +.. nonce: q4DqDY +.. section: Core and Builtins + +Change coro.cr_frame/gen.gi_frame to return ``None`` after the +coroutine/generator has been closed. This fixes a bug where +:func:`~inspect.getcoroutinestate` and :func:`~inspect.getgeneratorstate` +return the wrong state for a closed coroutine/generator. + +.. + +.. date: 2023-11-25-22-58-49 +.. gh-issue: 112388 +.. nonce: MU3cIM +.. section: Core and Builtins + +Fix an error that was causing the parser to try to overwrite tokenizer +errors. Patch by pablo Galindo + +.. + +.. date: 2023-11-25-22-39-44 +.. gh-issue: 112387 +.. nonce: AbBq5W +.. section: Core and Builtins + +Fix error positions for decoded strings with backwards tokenize errors. +Patch by Pablo Galindo + +.. + +.. date: 2023-11-25-20-36-38 +.. gh-issue: 99606 +.. nonce: fDY5hK +.. section: Core and Builtins + +Make code generated for an empty f-string identical to the code of an empty +normal string. + +.. + +.. date: 2023-11-24-14-10-57 +.. gh-issue: 112367 +.. nonce: 9z1IDp +.. section: Core and Builtins + +Avoid undefined behaviour when using the perf trampolines by not freeing the +code arenas until shutdown. Patch by Pablo Galindo + +.. + +.. date: 2023-11-22-13-17-54 +.. gh-issue: 112320 +.. nonce: EddM51 +.. section: Core and Builtins + +The Tier 2 translator now tracks the confidence level for staying "on trace" +(i.e. not exiting back to the Tier 1 interpreter) for branch instructions +based on the number of bits set in the branch "counter". Trace translation +ends when the confidence drops below 1/3rd. + +.. + +.. date: 2023-09-21-11-54-28 +.. gh-issue: 109598 +.. nonce: CRidSy +.. section: Core and Builtins + +:c:func:`PyComplex_RealAsDouble`/:c:func:`PyComplex_ImagAsDouble` now tries +to convert an object to a :class:`complex` instance using its +``__complex__()`` method before falling back to the ``__float__()`` method. +Patch by Sergey B Kirpichev. + +.. + +.. date: 2022-07-07-05-37-53 +.. gh-issue: 94606 +.. nonce: hojJ54 +.. section: Core and Builtins + +Fix UnicodeEncodeError when :func:`email.message.get_payload` reads a +message with a Unicode surrogate character and the message content is not +well-formed for surrogateescape encoding. Patch by Sidney Markowitz. + +.. + +.. bpo: 21861 +.. date: 2022-01-23-18-00-10 +.. nonce: N8E1zw +.. section: Core and Builtins + +Use the object's actual class name in :meth:`_io.FileIO.__repr__`, +:meth:`_io._WindowsConsoleIO` and :meth:`_io.TextIOWrapper.__repr__`, to +make these methods subclass friendly. + +.. + +.. bpo: 45369 +.. date: 2021-10-05-05-00-16 +.. nonce: tluk_X +.. section: Core and Builtins + +Remove LibreSSL workarounds as per :pep:`644`. + +.. + +.. bpo: 34392 +.. date: 2018-08-13-13-25-15 +.. nonce: 9kIlMF +.. section: Core and Builtins + +Added :func:`sys._is_interned`. + +.. + +.. date: 2024-01-15-12-12-54 +.. gh-issue: 114077 +.. nonce: KcVnfj +.. section: Library + +Fix possible :exc:`OverflowError` in :meth:`socket.socket.sendfile` when +pass *count* larger than 2 GiB on 32-bit platform. + +.. + +.. date: 2024-01-13-14-20-31 +.. gh-issue: 111803 +.. nonce: llpLAw +.. section: Library + +:mod:`plistlib` now supports loading more deeply nested lists in binary +format. + +.. + +.. date: 2024-01-13-11-34-29 +.. gh-issue: 114014 +.. nonce: WRHifN +.. section: Library + +Fixed a bug in :class:`fractions.Fraction` where an invalid string using +``d`` in the decimals part creates a different error compared to other +invalid letters/characters. Patch by Jeremiah Gabriel Pascual. + +.. + +.. date: 2024-01-11-22-22-51 +.. gh-issue: 108364 +.. nonce: QH7C-1 +.. section: Library + +:meth:`sqlite3.Connection.iterdump` now ensures that foreign key support is +disabled before dumping the database schema, if there is any foreign key +violation. Patch by Erlend E. Aasland and Mariusz Felisiak. + +.. + +.. date: 2024-01-11-16-58-10 +.. gh-issue: 113971 +.. nonce: skJZ4g +.. section: Library + +The :class:`zipfile.ZipInfo` previously protected ``._compresslevel`` +attribute has been made public as ``.compress_level`` with the old +``_compresslevel`` name remaining available as a property to retain +compatibility. + +.. + +.. date: 2024-01-10-12-03-38 +.. gh-issue: 113877 +.. nonce: RxKlrQ +.. section: Library + +Fix :mod:`tkinter` method ``winfo_pathname()`` on 64-bit Windows. + +.. + +.. date: 2024-01-09-18-07-08 +.. gh-issue: 113868 +.. nonce: DlZG2r +.. section: Library + +Added :data:`mmap.MAP_NORESERVE`, :data:`mmap.MAP_NOEXTEND`, +:data:`mmap.MAP_HASSEMAPHORE`, :data:`mmap.MAP_NOCACHE`, +:data:`mmap.MAP_JIT`, :data:`mmap.MAP_RESILIENT_CODESIGN`, +:data:`mmap.MAP_RESILIENT_MEDIA`, :data:`mmap.MAP_32BIT`, +:data:`mmap.MAP_TRANSLATED_ALLOW_EXECUTE`, :data:`mmap.MAP_UNIX03` and +:data:`mmap.MAP_TPRO`. All of them are ``mmap(2)`` flags on macOS. + +.. + +.. date: 2024-01-09-12-19-55 +.. gh-issue: 113848 +.. nonce: kXoCy0 +.. section: Library + +:func:`asyncio.TaskGroup()` and :func:`asyncio.timeout()` context managers +now handle :exc:`~asyncio.CancelledError` subclasses as well as exact +:exc:`!CancelledError`. + +.. + +.. date: 2024-01-09-08-59-43 +.. gh-issue: 113661 +.. nonce: asvXSx +.. section: Library + +unittest runner: Don't exit 5 if tests were skipped. The intention of +exiting 5 was to detect issues where the test suite wasn't discovered at +all. If we skipped tests, it was correctly discovered. + +.. + +.. date: 2024-01-08-19-38-42 +.. gh-issue: 96037 +.. nonce: Yr2Y1C +.. section: Library + +Insert :exc:`TimeoutError` in the context of the exception that was raised +during exiting an expired :func:`asyncio.timeout` block. + +.. + +.. date: 2024-01-08-14-57-09 +.. gh-issue: 113781 +.. nonce: IoTnwi +.. section: Library + +Silence unraisable AttributeError when warnings are emitted during Python +finalization. + +.. + +.. date: 2024-01-07-23-31-44 +.. gh-issue: 113238 +.. nonce: wFWBfW +.. section: Library + +Add ``Anchor`` to ``importlib.resources`` (in order for the code to comply +with the documentation) + +.. + +.. date: 2024-01-07-13-36-03 +.. gh-issue: 111693 +.. nonce: xN2LuL +.. section: Library + +:func:`asyncio.Condition.wait()` now re-raises the same +:exc:`CancelledError` instance that may have caused it to be interrupted. +Fixed race condition in :func:`asyncio.Semaphore.aquire` when interrupted +with a :exc:`CancelledError`. + +.. + +.. date: 2024-01-07-11-45-56 +.. gh-issue: 113791 +.. nonce: XF5xSW +.. section: Library + +Add ``CLOCK_MONOTONIC_RAW_APPROX`` and ``CLOCK_UPTIME_RAW_APPROX`` to +:mod:`time` on macOS. These are clocks available on macOS 10.12 or later. + +.. + +.. date: 2024-01-07-00-56-41 +.. gh-issue: 112932 +.. nonce: OfhUu7 +.. section: Library + +Restore the ability for :mod:`zipfile` to ``extractall`` from zip files with +a "/" directory entry in them as is commonly added to zips by some wiki or +bug tracker data exporters. + +.. + +.. date: 2024-01-05-21-52-59 +.. gh-issue: 113568 +.. nonce: _0FkpZ +.. section: Library + +Raise deprecation warnings from :class:`pathlib.PurePath` and not its +private base class ``PurePathBase``. + +.. + +.. date: 2024-01-05-12-42-07 +.. gh-issue: 113594 +.. nonce: 4t8HiR +.. section: Library + +Fix :exc:`UnicodeEncodeError` in :mod:`email` when re-fold lines that +contain unknown-8bit encoded part followed by non-unknown-8bit encoded part. + +.. + +.. date: 2024-01-03-14-19-26 +.. gh-issue: 113538 +.. nonce: ahuBCo +.. section: Library + +In :meth:`asyncio.StreamReaderProtocol.connection_made`, there is callback +that logs an error if the task wrapping the "connected callback" fails. This +callback would itself fail if the task was cancelled. Prevent this by +checking whether the task was cancelled first. If so, close the transport +but don't log an error. + +.. + +.. date: 2024-01-02-12-41-59 +.. gh-issue: 113626 +.. nonce: i1PPY_ +.. section: Library + +Add support for the *allow_code* argument in the :mod:`marshal` module. +Passing ``allow_code=False`` prevents serialization and de-serialization of +code objects which is incompatible between Python versions. + +.. + +.. date: 2024-01-01-13-26-02 +.. gh-issue: 85567 +.. nonce: K4U15m +.. section: Library + +Fix resource warnings for unclosed files in :mod:`pickle` and +:mod:`pickletools` command line interfaces. + +.. + +.. date: 2023-12-30-20-30-05 +.. gh-issue: 113537 +.. nonce: v1W5_X +.. section: Library + +Support loads ``str`` in :func:`plistlib.loads`. + +.. + +.. date: 2023-12-29-22-29-34 +.. gh-issue: 89850 +.. nonce: KnxiZA +.. section: Library + +Add default implementations of :meth:`pickle.Pickler.persistent_id` and +:meth:`pickle.Unpickler.persistent_load` methods in the C implementation. +Calling ``super().persistent_id()`` and ``super().persistent_load()`` in +subclasses of the C implementation of :class:`pickle.Pickler` and +:class:`pickle.Unpickler` classes no longer causes infinite recursion. + +.. + +.. date: 2023-12-29-17-57-45 +.. gh-issue: 113569 +.. nonce: qcRCEI +.. section: Library + +Indicate if there were no actual calls in unittest +:meth:`~unittest.mock.Mock.assert_has_calls` failure. + +.. + +.. date: 2023-12-29-17-46-06 +.. gh-issue: 101225 +.. nonce: QaEyxF +.. section: Library + +Increase the backlog for :class:`multiprocessing.connection.Listener` +objects created by :mod:`multiprocessing.manager` and +:mod:`multiprocessing.resource_sharer` to significantly reduce the risk of +getting a connection refused error when creating a +:class:`multiprocessing.connection.Connection` to them. + +.. + +.. date: 2023-12-29-17-30-49 +.. gh-issue: 113568 +.. nonce: UpWNAI +.. section: Library + +Raise audit events from :class:`pathlib.Path` and not its private base class +``PathBase``. + +.. + +.. date: 2023-12-28-14-36-20 +.. gh-issue: 113543 +.. nonce: 2iWkOR +.. section: Library + +Make sure that ``webbrowser.MacOSXOSAScript`` sends ``webbrowser.open`` +audit event. + +.. + +.. date: 2023-12-23-16-51-17 +.. gh-issue: 113028 +.. nonce: 3Jmdoj +.. section: Library + +When a second reference to a string appears in the input to :mod:`pickle`, +and the Python implementation is in use, we are guaranteed that a single +copy gets pickled and a single object is shared when reloaded. Previously, +in protocol 0, when a string contained certain characters (e.g. newline) it +resulted in duplicate objects. + +.. + +.. date: 2023-12-23-16-10-07 +.. gh-issue: 113421 +.. nonce: w7vs08 +.. section: Library + +Fix multiprocessing logger for ``%(filename)s``. + +.. + +.. date: 2023-12-23-13-10-42 +.. gh-issue: 111784 +.. nonce: Nb4L1j +.. section: Library + +Fix segfaults in the ``_elementtree`` module. Fix first segfault during +deallocation of ``_elementtree.XMLParser`` instances by keeping strong +reference to ``pyexpat`` module in module state for capsule lifetime. Fix +second segfault which happens in the same deallocation process by keeping +strong reference to ``_elementtree`` module in ``XMLParser`` structure for +``_elementtree`` module lifetime. + +.. + +.. date: 2023-12-22-20-49-52 +.. gh-issue: 113407 +.. nonce: C_O13_ +.. section: Library + +Fix import of :mod:`unittest.mock` when CPython is built without docstrings. + +.. + +.. date: 2023-12-22-11-30-57 +.. gh-issue: 113320 +.. nonce: Vp5suS +.. section: Library + +Fix regression in Python 3.12 where :class:`~typing.Protocol` classes that +were not marked as :func:`runtime-checkable <typing.runtime_checkable>` +would be unnecessarily introspected, potentially causing exceptions to be +raised if the protocol had problematic members. Patch by Alex Waygood. + +.. + +.. date: 2023-12-21-23-47-42 +.. gh-issue: 53502 +.. nonce: dercJI +.. section: Library + +Add a new option ``aware_datetime`` in :mod:`plistlib` to loads or dumps +aware datetime. + +.. + +.. date: 2023-12-21-14-55-06 +.. gh-issue: 113358 +.. nonce: nRkiSL +.. section: Library + +Fix rendering tracebacks with exceptions with a broken __getattr__ + +.. + +.. date: 2023-12-20-21-18-51 +.. gh-issue: 113214 +.. nonce: JcV9Mn +.. section: Library + +Fix an ``AttributeError`` during asyncio SSL protocol aborts in SSL-over-SSL +scenarios. + +.. + +.. date: 2023-12-18-09-47-54 +.. gh-issue: 113246 +.. nonce: em930H +.. section: Library + +Update bundled pip to 23.3.2. + +.. + +.. date: 2023-12-17-13-56-30 +.. gh-issue: 87264 +.. nonce: RgfHCv +.. section: Library + +Fixed tarfile list() method to show file type. + +.. + +.. date: 2023-12-17-10-22-55 +.. gh-issue: 112182 +.. nonce: jLWGlr +.. section: Library + +:meth:`asyncio.futures.Future.set_exception()` now transforms +:exc:`StopIteration` into :exc:`RuntimeError` instead of hanging or other +misbehavior. Patch contributed by Jamie Phan. + +.. + +.. date: 2023-12-17-04-43-57 +.. gh-issue: 113225 +.. nonce: dhxhiZ +.. section: Library + +Speed up :meth:`pathlib.Path.glob` by using :attr:`os.DirEntry.path` where +possible. + +.. + +.. date: 2023-12-16-23-56-42 +.. gh-issue: 113149 +.. nonce: 7LWgTS +.. section: Library + +Improve error message when a JSON array or object contains a trailing comma. +Patch by Carson Radtke. + +.. + +.. date: 2023-12-16-10-58-34 +.. gh-issue: 113117 +.. nonce: 0zF7bH +.. section: Library + +The :mod:`subprocess` module can now use the :func:`os.posix_spawn` function +with ``close_fds=True`` on platforms where +``posix_spawn_file_actions_addclosefrom_np`` is available. Patch by Jakub +Kulik. + +.. + +.. date: 2023-12-16-01-10-47 +.. gh-issue: 113199 +.. nonce: oDjnjL +.. section: Library + +Make ``http.client.HTTPResponse.read1`` and +``http.client.HTTPResponse.readline`` close IO after reading all data when +content length is known. Patch by Illia Volochii. + +.. + +.. date: 2023-12-15-21-33-42 +.. gh-issue: 113191 +.. nonce: Il155b +.. section: Library + +Add support of :func:`os.fchmod` and a file descriptor in :func:`os.chmod` +on Windows. + +.. + +.. date: 2023-12-15-20-29-49 +.. gh-issue: 113188 +.. nonce: AvoraB +.. section: Library + +Fix :func:`shutil.copymode` and :func:`shutil.copystat` on Windows. +Previously they worked differenly if *dst* is a symbolic link: they modified +the permission bits of *dst* itself rather than the file it points to if +*follow_symlinks* is true or *src* is not a symbolic link, and did not +modify the permission bits if *follow_symlinks* is false and *src* is a +symbolic link. + +.. + +.. date: 2023-12-15-18-13-59 +.. gh-issue: 113119 +.. nonce: al-569 +.. section: Library + +:func:`os.posix_spawn` now accepts ``env=None``, which makes the newly +spawned process use the current process environment. Patch by Jakub Kulik. + +.. + +.. date: 2023-12-15-18-10-26 +.. gh-issue: 113202 +.. nonce: xv_Ww8 +.. section: Library + +Add a ``strict`` option to ``batched()`` in the ``itertools`` module. + +.. + +.. date: 2023-12-15-12-35-28 +.. gh-issue: 61648 +.. nonce: G-4pz0 +.. section: Library + +Detect line numbers of properties in doctests. + +.. + +.. date: 2023-12-15-09-51-41 +.. gh-issue: 113175 +.. nonce: RHsNwE +.. section: Library + +Sync with importlib_metadata 7.0, including improved type annotations, fixed +issue with symlinked packages in ``package_distributions``, added +``EntryPoints.__repr__``, introduced the ``diagnose`` script, added +``Distribution.origin`` property, and removed deprecated ``EntryPoint`` +access by numeric index (tuple behavior). + +.. + +.. date: 2023-12-13-17-08-21 +.. gh-issue: 59616 +.. nonce: JNlWSs +.. section: Library + +Add support of :func:`os.lchmod` and the *follow_symlinks* argument in +:func:`os.chmod` on Windows. Note that the default value of +*follow_symlinks* in :func:`!os.lchmod` is ``False`` on Windows. + +.. + +.. date: 2023-12-12-20-15-57 +.. gh-issue: 112559 +.. nonce: IgXkje +.. section: Library + +:func:`signal.signal` and :func:`signal.getsignal` no longer call ``repr`` +on callable handlers. :func:`asyncio.run` and :meth:`asyncio.Runner.run` no +longer call ``repr`` on the task results. Patch by Yilei Yang. + +.. + +.. date: 2023-12-12-16-32-55 +.. gh-issue: 112962 +.. nonce: ZZWXZn +.. section: Library + +:mod:`dis` module functions add cache information to the +:class:`~dis.Instruction` instance rather than creating fake +:class:`~dis.Instruction` instances to represent the cache entries. + +.. + +.. date: 2023-12-12-05-48-17 +.. gh-issue: 112989 +.. nonce: ZAa_eq +.. section: Library + +Reduce overhead to connect sockets with :mod:`asyncio` SelectorEventLoop. + +.. + +.. date: 2023-12-11-16-13-15 +.. gh-issue: 112970 +.. nonce: 87jmKP +.. section: Library + +Use :c:func:`!closefrom` on Linux where available (e.g. glibc-2.34), rather +than only FreeBSD. + +.. + +.. date: 2023-12-11-14-12-46 +.. gh-issue: 110190 +.. nonce: e0iEUa +.. section: Library + +Fix ctypes structs with array on PPC64LE platform by setting +``MAX_STRUCT_SIZE`` to 64 in stgdict. Patch by Diego Russo. + +.. + +.. date: 2023-12-08-11-17-17 +.. gh-issue: 112540 +.. nonce: Pm5egX +.. section: Library + +The statistics.geometric_mean() function now returns zero for datasets +containing a zero. Formerly, it would raise an exception. + +.. + +.. date: 2023-12-07-16-55-41 +.. gh-issue: 87286 +.. nonce: MILC9_ +.. section: Library + +Added :const:`LOG_FTP`, :const:`LOG_NETINFO`, :const:`LOG_REMOTEAUTH`, +:const:`LOG_INSTALL`, :const:`LOG_RAS`, and :const:`LOG_LAUNCHD` tot the +:mod:`syslog` module, all of them constants on used on macOS. + +.. + +.. date: 2023-12-06-16-01-33 +.. gh-issue: 112800 +.. nonce: TNsGJ- +.. section: Library + +Fix :mod:`asyncio` ``SubprocessTransport.close()`` not to throw +``PermissionError`` when used with setuid executables. + +.. + +.. date: 2023-12-06-14-06-14 +.. gh-issue: 51944 +.. nonce: -5qq_L +.. section: Library + +Add the following constants to the :mod:`termios` module. These values are +present in macOS system headers: ``ALTWERASE``, ``B14400``, ``B28800``, +``B7200``, ``B76800``, ``CCAR_OFLOW``, ``CCTS_OFLOW``, ``CDSR_OFLOW``, +``CDTR_IFLOW``, ``CIGNORE``, ``CRTS_IFLOW``, ``EXTPROC``, ``IUTF8``, +``MDMBUF``, ``NL2``, ``NL3``, ``NOKERNINFO``, ``ONOEOT``, ``OXTABS``, +``VDSUSP``, ``VSTATUS``. + +.. + +.. date: 2023-12-05-18-57-53 +.. gh-issue: 79325 +.. nonce: P2vMVK +.. section: Library + +Fix an infinite recursion error in :func:`tempfile.TemporaryDirectory` +cleanup on Windows. + +.. + +.. date: 2023-12-05-16-20-40 +.. gh-issue: 94692 +.. nonce: -e5C3c +.. section: Library + +:func:`shutil.rmtree` now only catches OSError exceptions. Previously a +symlink attack resistant version of ``shutil.rmtree()`` could ignore or pass +to the error handler arbitrary exception when invalid arguments were +provided. + +.. + +.. date: 2023-12-05-01-19-28 +.. gh-issue: 112736 +.. nonce: rdHDrU +.. section: Library + +The use of del-safe symbols in ``subprocess`` was refactored to allow for +use in cross-platform build environments. + +.. + +.. date: 2023-12-04-21-30-34 +.. gh-issue: 112727 +.. nonce: jpgNRB +.. section: Library + +Speed up :meth:`pathlib.Path.absolute`. Patch by Barney Gale. + +.. + +.. date: 2023-12-04-16-45-11 +.. gh-issue: 74690 +.. nonce: pQYP5U +.. section: Library + +Speedup :func:`issubclass` checks against simple :func:`runtime-checkable +protocols <typing.runtime_checkable>` by around 6%. Patch by Alex Waygood. + +.. + +.. date: 2023-12-04-14-05-24 +.. gh-issue: 74690 +.. nonce: eODKRm +.. section: Library + +Speedup :func:`isinstance` checks by roughly 20% for +:func:`runtime-checkable protocols <typing.runtime_checkable>` that only +have one callable member. Speedup :func:`issubclass` checks for these +protocols by roughly 10%. Patch by Alex Waygood. + +.. + +.. date: 2023-12-03-12-41-48 +.. gh-issue: 112645 +.. nonce: blMsKf +.. section: Library + +Remove deprecation error on passing ``onerror`` to :func:`shutil.rmtree`. + +.. + +.. date: 2023-12-03-11-15-53 +.. gh-issue: 112640 +.. nonce: -FVwP7 +.. section: Library + +Add ``kwdefaults`` parameter to :data:`types.FunctionType` to set default +keyword argument values. + +.. + +.. date: 2023-12-03-01-01-52 +.. gh-issue: 112622 +.. nonce: 1Z8cpx +.. section: Library + +Ensure ``name`` parameter is passed to event loop in +:func:`asyncio.create_task`. + +.. + +.. date: 2023-12-02-12-55-17 +.. gh-issue: 112618 +.. nonce: 7_FT8- +.. section: Library + +Fix a caching bug relating to :data:`typing.Annotated`. ``Annotated[str, +True]`` is no longer identical to ``Annotated[str, 1]``. + +.. + +.. date: 2023-12-01-21-05-46 +.. gh-issue: 112334 +.. nonce: DmNXKh +.. section: Library + +Fixed a performance regression in 3.12's :mod:`subprocess` on Linux where it +would no longer use the fast-path ``vfork()`` system call when it could have +due to a logic bug, instead falling back to the safe but slower ``fork()``. + +Also fixed a second 3.12.0 potential security bug. If a value of +``extra_groups=[]`` was passed to :mod:`subprocess.Popen` or related APIs, +the underlying ``setgroups(0, NULL)`` system call to clear the groups list +would not be made in the child process prior to ``exec()``. + +This was identified via code inspection in the process of fixing the first +bug. + +.. + +.. date: 2023-12-01-18-05-09 +.. gh-issue: 110190 +.. nonce: 5bf-c9 +.. section: Library + +Fix ctypes structs with array on Arm platform by setting ``MAX_STRUCT_SIZE`` +to 32 in stgdict. Patch by Diego Russo. + +.. + +.. date: 2023-12-01-16-09-59 +.. gh-issue: 81194 +.. nonce: FFad1c +.. section: Library + +Fix a crash in :func:`socket.if_indextoname` with specific value (UINT_MAX). +Fix an integer overflow in :func:`socket.if_indextoname` on 64-bit +non-Windows platforms. + +.. + +.. date: 2023-12-01-08-28-09 +.. gh-issue: 112578 +.. nonce: bfNbfi +.. section: Library + +Fix a spurious :exc:`RuntimeWarning` when executing the :mod:`zipfile` +module. + +.. + +.. date: 2023-11-29-10-51-41 +.. gh-issue: 112516 +.. nonce: rFKUKN +.. section: Library + +Update the bundled copy of pip to version 23.3.1. + +.. + +.. date: 2023-11-29-02-26-32 +.. gh-issue: 112510 +.. nonce: j-zXGc +.. section: Library + +Add :data:`readline.backend` for the backend readline uses (``editline`` or +``readline``) + +.. + +.. date: 2023-11-28-20-47-39 +.. gh-issue: 112328 +.. nonce: Z2AxEY +.. section: Library + +[Enum] Make ``EnumDict``, ``EnumDict.member_names``, +``EnumType._add_alias_`` and ``EnumType._add_value_alias_`` public. + +.. + +.. date: 2023-11-28-20-01-33 +.. gh-issue: 112509 +.. nonce: QtoKed +.. section: Library + +Fix edge cases that could cause a key to be present in both the +``__required_keys__`` and ``__optional_keys__`` attributes of a +:class:`typing.TypedDict`. Patch by Jelle Zijlstra. + +.. + +.. date: 2023-11-28-02-39-30 +.. gh-issue: 101336 +.. nonce: ya433z +.. section: Library + +Add ``keep_alive`` keyword parameter for +:meth:`AbstractEventLoop.create_server` and +:meth:`BaseEventLoop.create_server`. + +.. + +.. date: 2023-11-27-12-41-23 +.. gh-issue: 63284 +.. nonce: q2Qi9q +.. section: Library + +Added support for TLS-PSK (pre-shared key) mode to the :mod:`ssl` module. + +.. + +.. date: 2023-11-26-13-44-19 +.. gh-issue: 112414 +.. nonce: kx2E7S +.. section: Library + +Fix regression in Python 3.12 where calling :func:`repr` on a module that +had been imported using a custom :term:`loader` could fail with +:exc:`AttributeError`. Patch by Alex Waygood. + +.. + +.. date: 2023-11-26-13-26-56 +.. gh-issue: 112358 +.. nonce: smhaeZ +.. section: Library + +Revert change to :class:`struct.Struct` initialization that broke some cases +of subclassing. + +.. + +.. date: 2023-11-25-20-29-28 +.. gh-issue: 112405 +.. nonce: cOtzxC +.. section: Library + +Optimize :meth:`pathlib.PurePath.relative_to`. Patch by Alex Waygood. + +.. + +.. date: 2023-11-24-21-00-24 +.. gh-issue: 94722 +.. nonce: GMIQIn +.. section: Library + +Fix bug where comparison between instances of :class:`~doctest.DocTest` +fails if one of them has ``None`` as its lineno. + +.. + +.. date: 2023-11-24-09-27-01 +.. gh-issue: 112361 +.. nonce: kYtnHW +.. section: Library + +Speed up a small handful of :mod:`pathlib` methods by removing some +temporary objects. + +.. + +.. date: 2023-11-23-17-25-27 +.. gh-issue: 112345 +.. nonce: FFApHx +.. section: Library + +Improve error message when trying to call :func:`issubclass` against a +:class:`typing.Protocol` that has non-method members. Patch by Randolf +Scholz. + +.. + +.. date: 2023-11-23-12-37-22 +.. gh-issue: 112137 +.. nonce: kM46Q6 +.. section: Library + +Change :mod:`dis` output to display no-lineno as "--" instead of "None". + +.. + +.. date: 2023-11-23-10-41-21 +.. gh-issue: 112332 +.. nonce: rhTBaa +.. section: Library + +Deprecate the ``exc_type`` field of :class:`traceback.TracebackException`. +Add ``exc_type_str`` to replace it. + +.. + +.. date: 2023-11-22-23-08-47 +.. gh-issue: 81620 +.. nonce: mfZ2Wf +.. section: Library + +Add extra tests for :func:`random.binomialvariate` + +.. + +.. date: 2023-11-22-19-43-54 +.. gh-issue: 112292 +.. nonce: 5nDU87 +.. section: Library + +Fix a crash in :mod:`readline` when imported from a sub interpreter. Patch +by Anthony Shaw + +.. + +.. date: 2023-11-21-02-58-14 +.. gh-issue: 77621 +.. nonce: MYv5XS +.. section: Library + +Slightly improve the import time of the :mod:`pathlib` module by deferring +some imports. Patch by Barney Gale. + +.. + +.. date: 2023-11-16-17-18-09 +.. gh-issue: 112137 +.. nonce: QvjGjN +.. section: Library + +Change :mod:`dis` output to display logical labels for jump targets instead +of offsets. + +.. + +.. date: 2023-11-16-10-42-15 +.. gh-issue: 112139 +.. nonce: WpHosf +.. section: Library + +Add :meth:`Signature.format` to format signatures to string with extra +options. And use it in :mod:`pydoc` to render more readable signatures that +have new lines between parameters. + +.. + +.. date: 2023-11-15-04-53-37 +.. gh-issue: 112105 +.. nonce: I3RcVN +.. section: Library + +Make :func:`readline.set_completer_delims` work with libedit + +.. + +.. date: 2023-11-15-01-36-04 +.. gh-issue: 106922 +.. nonce: qslOVH +.. section: Library + +Display multiple lines with ``traceback`` when errors span multiple lines. + +.. + +.. date: 2023-11-09-11-07-34 +.. gh-issue: 111874 +.. nonce: dzYc3j +.. section: Library + +When creating a :class:`typing.NamedTuple` class, ensure +:func:`~object.__set_name__` is called on all objects that define +``__set_name__`` and exist in the values of the ``NamedTuple`` class's class +dictionary. Patch by Alex Waygood. + +.. + +.. date: 2023-11-08-18-53-07 +.. gh-issue: 68166 +.. nonce: 1iTh4Y +.. section: Library + +Add support of the "vsapi" element type in +:meth:`tkinter.ttk.Style.element_create`. + +.. + +.. date: 2023-11-08-16-11-04 +.. gh-issue: 110275 +.. nonce: Bm6GwR +.. section: Library + +Named tuple's methods ``_replace()`` and ``__replace__()`` now raise +TypeError instead of ValueError for invalid keyword arguments. + +.. + +.. date: 2023-11-05-20-09-27 +.. gh-issue: 99367 +.. nonce: HLaWKo +.. section: Library + +Do not mangle ``sys.path[0]`` in :mod:`pdb` if safe_path is set + +.. + +.. date: 2023-11-02-10-13-31 +.. gh-issue: 111615 +.. nonce: 3SMixi +.. section: Library + +Fix a regression caused by a fix to gh-93162 whereby you couldn't configure +a :class:`QueueHandler` without specifying handlers. + +.. + +.. date: 2023-10-25-16-37-13 +.. gh-issue: 75666 +.. nonce: BpsWut +.. section: Library + +Fix the behavior of :mod:`tkinter` widget's ``unbind()`` method with two +arguments. Previously, ``widget.unbind(sequence, funcid)`` destroyed the +current binding for *sequence*, leaving *sequence* unbound, and deleted the +*funcid* command. Now it removes only *funcid* from the binding for +*sequence*, keeping other commands, and deletes the *funcid* command. It +leaves *sequence* unbound only if *funcid* was the last bound command. + +.. + +.. date: 2023-10-25-13-07-53 +.. gh-issue: 67790 +.. nonce: jMn9Ad +.. section: Library + +Implement basic formatting support (minimum width, alignment, fill) for +:class:`fractions.Fraction`. + +.. + +.. date: 2023-10-23-18-42-26 +.. gh-issue: 111049 +.. nonce: Ys7-o_ +.. section: Library + +Fix crash during garbage collection of the :class:`io.BytesIO` buffer +object. + +.. + +.. date: 2023-10-23-03-49-34 +.. gh-issue: 102980 +.. nonce: aXBd54 +.. section: Library + +Redirect the output of ``interact`` command of :mod:`pdb` to the same +channel as the debugger. Add tests and improve docs. + +.. + +.. date: 2023-10-20-15-28-08 +.. gh-issue: 102988 +.. nonce: dStNO7 +.. section: Library + +:func:`email.utils.getaddresses` and :func:`email.utils.parseaddr` now +return ``('', '')`` 2-tuples in more situations where invalid email +addresses are encountered instead of potentially inaccurate values. Add +optional *strict* parameter to these two functions: use ``strict=False`` to +get the old behavior, accept malformed inputs. ``getattr(email.utils, +'supports_strict_parsing', False)`` can be use to check if the *strict* +paramater is available. Patch by Thomas Dwyer and Victor Stinner to improve +the CVE-2023-27043 fix. + +.. + +.. date: 2023-10-17-16-11-03 +.. gh-issue: 52161 +.. nonce: WBYyCJ +.. section: Library + +:meth:`cmd.Cmd.do_help` now cleans docstrings with :func:`inspect.cleandoc` +before writing them. Patch by Filip Łapkiewicz. + +.. + +.. date: 2023-10-12-18-19-47 +.. gh-issue: 82300 +.. nonce: P8-O38 +.. section: Library + +Add ``track`` parameter to +:class:`multiprocessing.shared_memory.SharedMemory` that allows using shared +memory blocks without having to register with the POSIX resource tracker +that automatically releases them upon process exit. + +.. + +.. date: 2023-10-11-02-34-01 +.. gh-issue: 110109 +.. nonce: RFCmHs +.. section: Library + +Add private ``pathlib._PurePathBase`` class: a base class for +:class:`pathlib.PurePath` that omits certain magic methods. It may be made +public (along with ``_PathBase``) in future. + +.. + +.. date: 2023-09-28-13-15-51 +.. gh-issue: 109858 +.. nonce: 43e2dg +.. section: Library + +Protect :mod:`zipfile` from "quoted-overlap" zipbomb. It now raises +BadZipFile when try to read an entry that overlaps with other entry or +central directory. + +.. + +.. date: 2023-09-23-14-40-51 +.. gh-issue: 109786 +.. nonce: UX3pKv +.. section: Library + +Fix possible reference leaks and crash when re-enter the ``__next__()`` +method of :class:`itertools.pairwise`. + +.. + +.. date: 2023-09-01-15-33-18 +.. gh-issue: 91539 +.. nonce: xoNLEI +.. section: Library + +Small (10 - 20%) and trivial performance improvement of +:func:`urrlib.request.getproxies_environment`, typically useful when there +are many environment variables to go over. + +.. + +.. date: 2023-08-14-21-10-52 +.. gh-issue: 103363 +.. nonce: u64_QI +.. section: Library + +Add *follow_symlinks* keyword-only argument to :meth:`pathlib.Path.owner` +and :meth:`~pathlib.Path.group`, defaulting to ``True``. + +.. + +.. date: 2023-08-07-21-11-24 +.. gh-issue: 102130 +.. nonce: _UyI5i +.. section: Library + +Support tab completion in :mod:`cmd` for ``editline``. + +.. + +.. date: 2023-08-04-18-43-21 +.. gh-issue: 99437 +.. nonce: Et8hu8 +.. section: Library + +:func:`runpy.run_path` now decodes path-like objects, making sure __file__ +and sys.argv[0] of the module being run are always strings. + +.. + +.. date: 2023-04-29-20-49-13 +.. gh-issue: 104003 +.. nonce: -8Ruk2 +.. section: Library + +Add :func:`warnings.deprecated`, a decorator to mark deprecated functions to +static type checkers and to warn on usage of deprecated classes and +functions. See :pep:`702`. Patch by Jelle Zijlstra. + +.. + +.. date: 2023-04-23-11-08-02 +.. gh-issue: 103708 +.. nonce: Y17C7p +.. section: Library + +Make hardcoded python name, a configurable parameter so that different +implementations of python can override it instead of making huge diffs in +sysconfig.py + +.. + +.. date: 2023-04-09-21-05-43 +.. gh-issue: 66515 +.. nonce: 0DS8Ya +.. section: Library + +:class:`mailbox.MH` now supports folders that do not contain a +``.mh_sequences`` file (e.g. Claws Mail IMAP-cache folders). Patch by Serhiy +Storchaka. + +.. + +.. date: 2023-02-08-00-43-29 +.. gh-issue: 83162 +.. nonce: ufdI9F +.. section: Library + +Renamed :exc:`!re.error` to :exc:`PatternError` for clarity, and kept +:exc:`!re.error` for backward compatibility. Patch by Matthias Bussonnier +and Adam Chhina. + +.. + +.. date: 2022-12-01-16-57-44 +.. gh-issue: 91133 +.. nonce: LKMVCV +.. section: Library + +Fix a bug in :class:`tempfile.TemporaryDirectory` cleanup, which now no +longer dereferences symlinks when working around file system permission +errors. + +.. + +.. bpo: 43153 +.. date: 2021-12-06-22-10-53 +.. nonce: J7mjSy +.. section: Library + +On Windows, ``tempfile.TemporaryDirectory`` previously masked a +``PermissionError`` with ``NotADirectoryError`` during directory cleanup. It +now correctly raises ``PermissionError`` if errors are not ignored. Patch by +Andrei Kulakov and Ken Jin. + +.. + +.. bpo: 32731 +.. date: 2021-11-23-22-22-49 +.. nonce: kNOASr +.. section: Library + +:func:`getpass.getuser` now raises :exc:`OSError` for all failures rather +than :exc:`ImportError` on systems lacking the :mod:`pwd` module or +:exc:`KeyError` if the password database is empty. + +.. + +.. bpo: 34321 +.. date: 2021-04-15-10-41-51 +.. nonce: 36m6_l +.. section: Library + +:class:`mmap.mmap` now has a *trackfd* parameter on Unix; if it is +``False``, the file descriptor specified by *fileno* will not be duplicated. + +.. + +.. bpo: 35332 +.. date: 2020-12-14-09-31-13 +.. nonce: s22wAx +.. section: Library + +The :func:`shutil.rmtree` function now ignores errors when calling +:func:`os.close` when *ignore_errors* is ``True``, and :func:`os.close` no +longer retried after error. + +.. + +.. bpo: 35928 +.. date: 2020-10-03-23-47-28 +.. nonce: E0iPAa +.. section: Library + +:class:`io.TextIOWrapper` now correctly handles the decoding buffer after +``read()`` and ``write()``. + +.. + +.. bpo: 26791 +.. date: 2020-08-06-14-43-55 +.. nonce: KxoEfO +.. section: Library + +:func:`shutil.move` now moves a symlink into a directory when that directory +is the target of the symlink. This provides the same behavior as the mv +shell command. The previous behavior raised an exception. Patch by Jeffrey +Kintscher. + +.. + +.. bpo: 41422 +.. date: 2020-07-28-20-48-05 +.. nonce: iMwnMu +.. section: Library + +Fixed memory leaks of :class:`pickle.Pickler` and :class:`pickle.Unpickler` +involving cyclic references via the internal memo mapping. + +.. + +.. bpo: 19821 +.. date: 2020-06-15-23-44-53 +.. nonce: ihBk39 +.. section: Library + +The :func:`!pydoc.ispackage` function has been deprecated. + +.. + +.. bpo: 40262 +.. date: 2020-05-21-23-32-46 +.. nonce: z4fQv1 +.. section: Library + +The :meth:`ssl.SSLSocket.recv_into` method no longer requires the *buffer* +argument to implement ``__len__`` and supports buffers with arbitrary item +size. + +.. + +.. bpo: 39912 +.. date: 2020-03-09-15-08-29 +.. nonce: xPOBBY +.. section: Library + +:func:`warnings.filterwarnings()` and :func:`warnings.simplefilter()` now +raise appropriate exceptions instead of ``AssertionError``. Patch +contributed by Rémi Lapeyre. + +.. + +.. bpo: 37260 +.. date: 2019-06-14-22-37-32 +.. nonce: oecdIf +.. section: Library + +Fixed a race condition in :func:`shutil.rmtree` in which directory entries +removed by another process or thread while ``shutil.rmtree()`` is running +can cause it to raise FileNotFoundError. Patch by Jeffrey Kintscher. + +.. + +.. bpo: 36959 +.. date: 2019-05-18-15-50-14 +.. nonce: ew6WZ4 +.. section: Library + +Fix some error messages for invalid ISO format string combinations in +``strptime()`` that referred to directives not contained in the format +string. Patch by Gordon P. Hemsley. + +.. + +.. bpo: 18060 +.. date: 2019-05-17-07-22-33 +.. nonce: 5mqTQM +.. section: Library + +Fixed a class inheritance issue that can cause segfaults when deriving two +or more levels of subclasses from a base class of Structure or Union. + +.. + +.. bpo: 29779 +.. date: 2019-05-08-13-14-11 +.. nonce: jg33dp +.. section: Library + +Add a new :envvar:`PYTHON_HISTORY` environment variable to set the location +of a ``.python_history`` file. + +.. + +.. bpo: 21360 +.. date: 2019-02-12-16-12-54 +.. nonce: gkSSfx +.. section: Library + +:class:`mailbox.Maildir` now ignores files with a leading dot. + +.. + +.. date: 2023-11-30-02-33-59 +.. gh-issue: 111699 +.. nonce: _O5G_y +.. section: Documentation + +Relocate ``smtpd`` deprecation notice to its own section rather than under +``locale`` in What's New in Python 3.12 document + +.. + +.. date: 2023-10-23-23-43-43 +.. gh-issue: 110746 +.. nonce: yg77IE +.. section: Documentation + +Improved markup for valid options/values for methods ttk.treeview.column and +ttk.treeview.heading, and for Layouts. + +.. + +.. date: 2023-08-01-13-11-39 +.. gh-issue: 95649 +.. nonce: F4KhPS +.. section: Documentation + +Document that the :mod:`asyncio` module contains code taken from `v0.16.0 of +the uvloop project <https://github.com/MagicStack/uvloop/tree/v0.16.0>`_, as +well as the required MIT licensing information. + +.. + +.. date: 2024-01-12-14-34-24 +.. gh-issue: 111798 +.. nonce: hd9B_- +.. section: Tests + +Disable ``test_super_deep()`` from ``test_call`` under pydebug builds on +WASI; the stack depth is too small to make the test useful. + +.. + +.. date: 2024-01-12-13-19-12 +.. gh-issue: 111801 +.. nonce: 9hh9DY +.. section: Tests + +Lower the recursion limit in ``test_isinstance`` for +``test_infinitely_many_bases()``. This prevents a stack overflow on a +pydebug build of WASI. + +.. + +.. date: 2024-01-12-12-45-24 +.. gh-issue: 111802 +.. nonce: gN41vt +.. section: Tests + +Specify a low recursion depth for ``test_bad_getattr()`` in +``test.pickletester`` to avoid exhausting the stack under a pydebug build +for WASI. + +.. + +.. date: 2024-01-08-21-15-48 +.. gh-issue: 44626 +.. nonce: DRq-PR +.. section: Tests + +Fix :func:`os.path.isabs` incorrectly returning ``True`` when given a path +that starts with exactly one (back)slash on Windows. + +Fix :meth:`pathlib.PureWindowsPath.is_absolute` incorrectly returning +``False`` for some paths beginning with two (back)slashes. + +.. + +.. date: 2024-01-01-14-40-02 +.. gh-issue: 113633 +.. nonce: VOY5ai +.. section: Tests + +Use module state for the _testcapi extension module. + +.. + +.. date: 2023-12-09-21-27-46 +.. gh-issue: 109980 +.. nonce: y--500 +.. section: Tests + +Fix ``test_tarfile_vs_tar`` in ``test_shutil`` for macOS, where system tar +can include more information in the archive than :mod:`shutil.make_archive`. + +.. + +.. date: 2023-12-05-19-50-03 +.. gh-issue: 112769 +.. nonce: kdLJmS +.. section: Tests + +The tests now correctly compare zlib version when +:const:`zlib.ZLIB_RUNTIME_VERSION` contains non-integer suffixes. For +example zlib-ng defines the version as ``1.3.0.zlib-ng``. + +.. + +.. date: 2023-12-04-15-56-11 +.. gh-issue: 112334 +.. nonce: FFc9Ti +.. section: Tests + +Adds a regression test to verify that ``vfork()`` is used when expected by +:mod:`subprocess` on vfork enabled POSIX systems (Linux). + +.. + +.. date: 2023-09-05-20-46-35 +.. gh-issue: 108927 +.. nonce: TpwWav +.. section: Tests + +Fixed order dependence in running tests in the same process when a test that +has submodules (e.g. test_importlib) follows a test that imports its +submodule (e.g. test_importlib.util) and precedes a test (e.g. test_unittest +or test_compileall) that uses that submodule. + +.. + +.. bpo: 40648 +.. date: 2020-05-16-18-00-21 +.. nonce: p2uPqy +.. section: Tests + +Test modes that file can get with chmod() on Windows. + +.. + +.. date: 2024-01-15-16-58-43 +.. gh-issue: 114013 +.. nonce: FoSeQf +.. section: Build + +Fix ``Tools/wasm/wasi.py`` to not include the path to ``python.wasm`` as +part of ``HOSTRUNNER``. The environment variable is meant to specify how to +run the WASI host only, having ``python.wasm`` and relevant flags appended +to the ``HOSTRUNNER``. This fixes ``make test`` work. + +.. + +.. date: 2023-12-23-09-35-48 +.. gh-issue: 113258 +.. nonce: GlsAyH +.. section: Build + +Changed the Windows build to write out generated frozen modules into the +build tree instead of the source tree. + +.. + +.. date: 2023-12-21-05-35-06 +.. gh-issue: 112305 +.. nonce: VfqQPx +.. section: Build + +Fixed the ``check-clean-src`` step performed on out of tree builds to detect +errant ``$(srcdir)/Python/frozen_modules/*.h`` files and recommend +appropriate source tree cleanup steps to get a working build again. + +.. + +.. date: 2023-12-17-18-23-02 +.. gh-issue: 112536 +.. nonce: 8lr3Ep +.. section: Build + +Add support for thread sanitizer (TSAN) + +.. + +.. date: 2023-12-08-11-33-37 +.. gh-issue: 112867 +.. nonce: ZzDfXQ +.. section: Build + +Fix the build for the case that WITH_PYMALLOC_RADIX_TREE=0 set. + +.. + +.. date: 2023-11-27-13-55-47 +.. gh-issue: 103065 +.. nonce: o72OiA +.. section: Build + +Introduce ``Tools/wasm/wasi.py`` to simplify doing a WASI build. + +.. + +.. bpo: 11102 +.. date: 2020-05-01-23-44-31 +.. nonce: Fw9zeS +.. section: Build + +The :func:`os.major`, :func:`os.makedev`, and :func:`os.minor` functions are +now available on HP-UX v3. + +.. + +.. bpo: 36351 +.. date: 2020-01-11-23-49-17 +.. nonce: ce8BBh +.. section: Build + +Do not set ipv6type when cross-compiling. + +.. + +.. date: 2024-01-15-23-53-25 +.. gh-issue: 114096 +.. nonce: G-Myja +.. section: Windows + +Process privileges that are activated for creating directory junctions are +now restored afterwards, avoiding behaviour changes in other parts of the +program. + +.. + +.. date: 2024-01-04-21-16-31 +.. gh-issue: 111877 +.. nonce: fR-B4c +.. section: Windows + +:func:`os.stat` calls were returning incorrect time values for files that +could not be accessed directly. + +.. + +.. date: 2023-12-19-10-56-46 +.. gh-issue: 111973 +.. nonce: A9Wtsb +.. section: Windows + +Update Windows installer to use SQLite 3.44.2. + +.. + +.. date: 2023-12-14-19-00-29 +.. gh-issue: 113009 +.. nonce: 6LNdjz +.. section: Windows + +:mod:`multiprocessing`: On Windows, fix a race condition in +``Process.terminate()``: no longer set the ``returncode`` attribute to +always call ``WaitForSingleObject()`` in ``Process.wait()``. Previously, +sometimes the process was still running after ``TerminateProcess()`` even if +``GetExitCodeProcess()`` is not ``STILL_ACTIVE``. Patch by Victor Stinner. + +.. + +.. date: 2023-12-12-20-58-09 +.. gh-issue: 86179 +.. nonce: YYSk_6 +.. section: Windows + +Fixes path calculations when launching Python on Windows through a symlink. + +.. + +.. date: 2023-12-11-20-23-04 +.. gh-issue: 71383 +.. nonce: 9pZh6t +.. section: Windows + +Update Tcl/Tk in Windows installer to 8.6.13 with a patch to suppress +incorrect ThemeChanged warnings. + +.. + +.. date: 2023-12-05-22-56-30 +.. gh-issue: 111650 +.. nonce: xlWmvM +.. section: Windows + +Ensures the ``Py_GIL_DISABLED`` preprocessor variable is defined in +:file:`pyconfig.h` so that extension modules written in C are able to use +it. + +.. + +.. date: 2023-12-03-19-22-37 +.. gh-issue: 112278 +.. nonce: FiloCE +.. section: Windows + +Reduce the time cost for some functions in :mod:`platform` on Windows if +current user has no permission to the WMI. + +.. + +.. date: 2023-08-08-01-42-14 +.. gh-issue: 73427 +.. nonce: WOpiNt +.. section: Windows + +Deprecate :func:`sys._enablelegacywindowsfsencoding`. Use +:envvar:`PYTHONLEGACYWINDOWSFSENCODING` instead. Patch by Inada Naoki. + +.. + +.. date: 2023-03-15-23-53-45 +.. gh-issue: 87868 +.. nonce: 4C36oQ +.. section: Windows + +Correctly sort and remove duplicate environment variables in +:py:func:`!_winapi.CreateProcess`. + +.. + +.. bpo: 37308 +.. date: 2019-06-16-11-27-05 +.. nonce: Iz_NU_ +.. section: Windows + +Fix mojibake in :class:`mmap.mmap` when using a non-ASCII *tagname* argument +on Windows. + +.. + +.. date: 2024-01-02-22-25-21 +.. gh-issue: 113666 +.. nonce: xKZoBm +.. section: macOS + +Add the following constants to module :mod:`stat`: ``UF_SETTABLE``, +``UF_TRACKED``, ``UF_DATAVAULT``, ``SF_SUPPORTED``, ``SF_SETTABLE``, +``SF_SYNTHETIC``, ``SF_RESTRICTED``, ``SF_FIRMLINK`` and ``SF_DATALESS``. +The values ``UF_SETTABLE``, ``SF_SUPPORTED``, ``SF_SETTABLE`` and +``SF_SYNTHETIC`` are only available on macOS. + +.. + +.. date: 2023-12-28-12-18-39 +.. gh-issue: 113536 +.. nonce: 0ythg7 +.. section: macOS + +:func:`os.waitid` is now available on macOS + +.. + +.. date: 2023-12-23-22-41-07 +.. gh-issue: 110459 +.. nonce: NaMBJy +.. section: macOS + +Running ``configure ... --with-openssl-rpath=X/Y/Z`` no longer fails to +detect OpenSSL on macOS. + +.. + +.. date: 2023-12-21-11-53-47 +.. gh-issue: 74573 +.. nonce: MA6Vys +.. section: macOS + +Document that :mod:`dbm.ndbm` can silently corrupt DBM files on updates when +exceeding undocumented platform limits, and can crash (segmentation fault) +when reading such a corrupted file. (FB8919203) + +.. + +.. date: 2023-12-21-10-20-41 +.. gh-issue: 65701 +.. nonce: Q2hNbN +.. section: macOS + +The :program:`freeze` tool doesn't work with framework builds of Python. +Document this and bail out early when running the tool with such a build. + +.. + +.. date: 2023-12-21-09-41-42 +.. gh-issue: 87277 +.. nonce: IF6EZZ +.. section: macOS + +webbrowser: Don't look for X11 browsers on macOS. Those are generally not +used and probing for them can result in starting XQuartz even if it isn't +used otherwise. + +.. + +.. date: 2023-12-19-10-50-08 +.. gh-issue: 111973 +.. nonce: HMHJfy +.. section: macOS + +Update macOS installer to use SQLite 3.44.2. + +.. + +.. date: 2023-12-16-11-45-32 +.. gh-issue: 108269 +.. nonce: wVgCHF +.. section: macOS + +Set ``CFBundleAllowMixedLocalizations`` to true in the Info.plist for the +framework, embedded Python.app and IDLE.app with framework installs on +macOS. This allows applications to pick up the user's preferred locale when +that's different from english. + +.. + +.. date: 2023-12-10-20-30-06 +.. gh-issue: 102362 +.. nonce: y8svbF +.. section: macOS + +Make sure the result of :func:`sysconfig.get_plaform` includes at least a +major and minor versions, even if ``MACOSX_DEPLOYMENT_TARGET`` is set to +only a major version during build to match the format expected by pip. + +.. + +.. date: 2023-12-07-15-53-16 +.. gh-issue: 110017 +.. nonce: UMYzMR +.. section: macOS + +Disable a signal handling stress test on macOS due to a bug in macOS +(FB13453490). + +.. + +.. date: 2023-12-07-14-19-46 +.. gh-issue: 110820 +.. nonce: DIxb_F +.. section: macOS + +Make sure the preprocessor definitions for ``ALIGNOF_MAX_ALIGN_T``, +``SIZEOF_LONG_DOUBLE`` and ``HAVE_GCC_ASM_FOR_X64`` are correct for +Universal 2 builds on macOS. + +.. + +.. date: 2023-12-06-12-11-13 +.. gh-issue: 109981 +.. nonce: mOHg10 +.. section: macOS + +Use ``/dev/fd`` on macOS to determine the number of open files in +``test.support.os_helper.fd_count`` to avoid a crash with "guarded" file +descriptors when probing for open files. + +.. + +.. date: 2024-01-17-02-15-33 +.. gh-issue: 72284 +.. nonce: cAQiYO +.. section: IDLE + +Improve the lists of features, editor key bindings, and shell key bingings +in the IDLE doc. + +.. + +.. date: 2024-01-11-21-26-58 +.. gh-issue: 113903 +.. nonce: __GLlQ +.. section: IDLE + +Fix rare failure of test.test_idle, in test_configdialog. + +.. + +.. date: 2024-01-05-12-24-01 +.. gh-issue: 113729 +.. nonce: qpluea +.. section: IDLE + +Fix the "Help -> IDLE Doc" menu bug in 3.11.7 and 3.12.1. + +.. + +.. date: 2023-12-19-00-03-12 +.. gh-issue: 113269 +.. nonce: lrU-IC +.. section: IDLE + +Fix test_editor hang on macOS Catalina. + +.. + +.. date: 2023-12-10-20-01-11 +.. gh-issue: 112898 +.. nonce: 98aWv2 +.. section: IDLE + +Fix processing unsaved files when quitting IDLE on macOS. + +.. + +.. bpo: 13586 +.. date: 2019-12-13-12-26-56 +.. nonce: 1grqsR +.. section: IDLE + +Enter the selected text when opening the "Replace" dialog. + +.. + +.. date: 2023-12-02-02-08-11 +.. gh-issue: 106560 +.. nonce: THvuji +.. section: C API + +Fix redundant declarations in the public C API. Declare PyBool_Type, +PyLong_Type and PySys_Audit() only once. Patch by Victor Stinner. + +.. + +.. date: 2023-11-27-09-44-16 +.. gh-issue: 112438 +.. nonce: GdNZiI +.. section: C API + +Fix support of format units "es", "et", "es#", and "et#" in nested tuples in +:c:func:`PyArg_ParseTuple`-like functions. + +.. + +.. date: 2023-11-15-01-26-59 +.. gh-issue: 111545 +.. nonce: iAoFtA +.. section: C API + +Add :c:func:`Py_HashPointer` function to hash a pointer. Patch by Victor +Stinner. + +.. + +.. date: 2023-06-21-11-53-09 +.. gh-issue: 65210 +.. nonce: PhFRBJ +.. section: C API + +Change the declaration of the *keywords* parameter of +:c:func:`PyArg_ParseTupleAndKeywords` and +:c:func:`PyArg_VaParseTupleAndKeywords` for better compatibility with C++. |