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diff --git a/Misc/NEWS.d/3.13.0a2.rst b/Misc/NEWS.d/3.13.0a2.rst new file mode 100644 index 0000000..c1b1be5 --- /dev/null +++ b/Misc/NEWS.d/3.13.0a2.rst @@ -0,0 +1,1622 @@ +.. date: 2023-11-20-14-13-02 +.. gh-issue: 112243 +.. nonce: FKdQnr +.. release date: 2023-11-22 +.. section: Core and Builtins + +Don't include comments in f-string debug expressions. Patch by Pablo Galindo + +.. + +.. date: 2023-11-20-10-40-40 +.. gh-issue: 112287 +.. nonce: 15gWAK +.. section: Core and Builtins + +Slightly optimize the Tier 2 (uop) interpreter by only loading ``oparg`` and +``operand`` when needed. Also double the trace size limit again, to 512 this +time. + +.. + +.. date: 2023-11-19-15-57-23 +.. gh-issue: 112266 +.. nonce: BSJMbR +.. section: Core and Builtins + +Change docstrings of :attr:`~object.__dict__` and +:attr:`~object.__weakref__`. + +.. + +.. date: 2023-11-17-16-49-32 +.. gh-issue: 111807 +.. nonce: QvjP9_ +.. section: Core and Builtins + +Lower the max parser stack depth to 1000 under WASI debug builds. + +.. + +.. date: 2023-11-15-20-20-51 +.. gh-issue: 111798 +.. nonce: cs-3t3 +.. section: Core and Builtins + +When Python is built in debug mode, set the C recursion limit to 500 instead +of 1500. A debug build is likely built with low optimization level which +implies higher stack memory usage than a release build. Patch by Victor +Stinner. + +.. + +.. date: 2023-11-15-16-14-10 +.. gh-issue: 106529 +.. nonce: Y48ax9 +.. section: Core and Builtins + +Enable translating unspecialized ``FOR_ITER`` to Tier 2. + +.. + +.. date: 2023-11-14-22-12-11 +.. gh-issue: 111916 +.. nonce: ZGCayL +.. section: Core and Builtins + +Make hashlib related modules thread-safe without the GIL + +.. + +.. date: 2023-11-07-12-59-02 +.. gh-issue: 81137 +.. nonce: qFpJCY +.. section: Core and Builtins + +Deprecate assignment to a function's ``__code__`` field when the new code +object is of a mismatched type (e.g., from a generator to a plain function). + +.. + +.. date: 2023-11-06-16-44-09 +.. gh-issue: 79932 +.. nonce: 2qv7uD +.. section: Core and Builtins + +Raise exception if :meth:`frame.clear` is called on a suspended frame. + +.. + +.. date: 2023-11-05-20-59-10 +.. gh-issue: 81925 +.. nonce: wKHLSS +.. section: Core and Builtins + +Implement native thread ids for GNU KFreeBSD. + +.. + +.. date: 2023-11-05-06-40-35 +.. gh-issue: 111843 +.. nonce: c045cB +.. section: Core and Builtins + +Use exponential backoff to reduce the number of failed tier 2 optimization +attempts by over 99%. + +.. + +.. date: 2023-11-04-13-36-51 +.. gh-issue: 110829 +.. nonce: Pa0CJI +.. section: Core and Builtins + +Joining a thread now ensures the underlying OS thread has exited. This is +required for safer fork() in multi-threaded processes. + +.. + +.. date: 2023-11-03-22-48-29 +.. gh-issue: 109369 +.. nonce: ELYaxJ +.. section: Core and Builtins + +Make sure that tier 2 traces are de-optimized if the code is instrumented + +.. + +.. date: 2023-11-03-19-25-38 +.. gh-issue: 111772 +.. nonce: aRQvOn +.. section: Core and Builtins + +Specialize slot loads and stores for _Py_T_OBJECT as well as Py_T_OBJECT_EX + +.. + +.. date: 2023-11-03-01-23-48 +.. gh-issue: 111666 +.. nonce: l8Q8G5 +.. section: Core and Builtins + +Speed up :meth:`BaseExceptionGroup.derive`, +:meth:`BaseExceptionGroup.subgroup`, and :meth:`BaseExceptionGroup.split` by +changing how they parse passed arguments. + +.. + +.. date: 2023-11-03-01-04-55 +.. gh-issue: 111654 +.. nonce: scUhDO +.. section: Core and Builtins + +Fix runtime crash when some error happens in opcode +``LOAD_FROM_DICT_OR_DEREF``. + +.. + +.. date: 2023-11-02-15-00-57 +.. gh-issue: 111623 +.. nonce: BZxYc8 +.. section: Core and Builtins + +Add support for sharing tuples between interpreters using the +cross-interpreter API. Patch by Anthony Shaw. + +.. + +.. date: 2023-11-02-14-49-19 +.. gh-issue: 111354 +.. nonce: gIS3f- +.. section: Core and Builtins + +The oparg of :opcode:`YIELD_VALUE` is now ``1`` if the instruction is part +of a yield-from or await, and ``0`` otherwise. + +The SUSPENDED frame state is now split into ``SUSPENDED`` and +``SUSPENDED_YIELD_FROM``. This simplifies the code in ``_PyGen_yf``. + +.. + +.. date: 2023-10-31-21-33-35 +.. gh-issue: 111520 +.. nonce: vw-rxJ +.. section: Core and Builtins + +Merge the Tier 1 (bytecode) and Tier 2 (micro-ops) interpreters together, +moving the Tier 2 interpreter loop and switch into +``_PyEval_EvalFrameDefault()`` in ``Python/ceval.c``. The +``Python/executor.c`` file is gone. Also the ``TIER_ONE`` and ``TIER_TWO`` +macros are now handled by the code generator. + +**Beware!** This changes the environment variables to enable micro-ops and +their debugging to ``PYTHON_UOPS`` and ``PYTHON_LLTRACE``. + +.. + +.. date: 2023-10-31-14-25-21 +.. gh-issue: 109181 +.. nonce: 11h6Mc +.. section: Core and Builtins + +Speed up :obj:`Traceback` object creation by lazily compute the line number. +Patch by Pablo Galindo + +.. + +.. date: 2023-10-29-20-11-21 +.. gh-issue: 111420 +.. nonce: IUT-GK +.. section: Core and Builtins + +Allow type comments in parenthesized ``with`` statements + +.. + +.. date: 2023-10-29-12-33-33 +.. gh-issue: 111438 +.. nonce: bHTLLl +.. section: Core and Builtins + +Add support for sharing floats between interpreters using the +cross-interpreter API. Patch by Anthony Shaw. + +.. + +.. date: 2023-10-29-11-35-21 +.. gh-issue: 111435 +.. nonce: ageUWQ +.. section: Core and Builtins + +Add support for sharing of True and False between interpreters using the +cross-interpreter API. Patch by Anthony Shaw. + +.. + +.. date: 2023-10-27-19-38-33 +.. gh-issue: 102388 +.. nonce: vd5YUZ +.. section: Core and Builtins + +Fix a bug where ``iso2022_jp_3`` and ``iso2022_jp_2004`` codecs read out of +bounds + +.. + +.. date: 2023-10-27-12-17-49 +.. gh-issue: 111366 +.. nonce: _TSknV +.. section: Core and Builtins + +Fix an issue in the :mod:`codeop` that was causing :exc:`SyntaxError` +exceptions raised in the presence of invalid syntax to not contain precise +error messages. Patch by Pablo Galindo + +.. + +.. date: 2023-10-27-11-51-40 +.. gh-issue: 111380 +.. nonce: vgSbir +.. section: Core and Builtins + +Fix a bug that was causing :exc:`SyntaxWarning` to appear twice when parsing +if invalid syntax is encountered later. Patch by Pablo galindo + +.. + +.. date: 2023-10-27-11-22-09 +.. gh-issue: 111374 +.. nonce: e9lrPZ +.. section: Core and Builtins + +Added a new environment variable :envvar:`PYTHON_FROZEN_MODULES`. It +determines whether or not frozen modules are ignored by the import +machinery, equivalent of the :option:`-X frozen_modules <-X>` command-line +option. + +.. + +.. date: 2023-10-26-18-45-20 +.. gh-issue: 111354 +.. nonce: GrT-Wf +.. section: Core and Builtins + +Remove ``oparg`` from :opcode:`YIELD_VALUE`. Change ``oparg`` of +:opcode:`RESUME` to include information about the except-depth. These +changes make it possible to simplify the code in generator close. + +.. + +.. date: 2023-10-23-22-11-09 +.. gh-issue: 94438 +.. nonce: y2pITu +.. section: Core and Builtins + +Fix a regression that prevented jumping across ``is None`` and ``is not +None`` when debugging. Patch by Savannah Ostrowski. + +.. + +.. date: 2023-10-23-15-44-47 +.. gh-issue: 67224 +.. nonce: S4D6CR +.. section: Core and Builtins + +Show source lines in tracebacks when using the ``-c`` option when running +Python. Patch by Pablo Galindo + +.. + +.. date: 2023-10-20-23-14-06 +.. gh-issue: 111123 +.. nonce: jjVc3M +.. section: Core and Builtins + +Fix a bug where a :keyword:`global` declaration in an :keyword:`except` +block is rejected when the global is used in the :keyword:`else` block. + +.. + +.. date: 2023-10-17-11-03-45 +.. gh-issue: 110938 +.. nonce: X3sbMb +.. section: Core and Builtins + +Fix error messages for indented blocks with functions and classes with +generic type parameters. Patch by Pablo Galindo + +.. + +.. date: 2023-10-16-15-51-37 +.. gh-issue: 109214 +.. nonce: -RGTFH +.. section: Core and Builtins + +Remove unnecessary instruction pointer updates before returning from frames. + +.. + +.. date: 2023-10-16-12-12-48 +.. gh-issue: 110912 +.. nonce: uEJGi_ +.. section: Core and Builtins + +Correctly display the traceback for :exc:`MemoryError` exceptions using the +:mod:`traceback` module. Patch by Pablo Galindo + +.. + +.. date: 2023-10-15-22-18-45 +.. gh-issue: 109894 +.. nonce: UAmo06 +.. section: Core and Builtins + +Fixed crash due to improperly initialized static :exc:`MemoryError` in +subinterpreter. + +.. + +.. date: 2023-10-15-20-45-35 +.. gh-issue: 110892 +.. nonce: oA6eVY +.. section: Core and Builtins + +Return ``NULL`` for ``PyTrace_RETURN`` events caused by an exception + +.. + +.. date: 2023-10-14-12-19-34 +.. gh-issue: 110864 +.. nonce: -baPDE +.. section: Core and Builtins + +Fix argument parsing by ``_PyArg_UnpackKeywordsWithVararg`` for functions +defining pos-or-keyword, vararg, and kw-only parameters. + +.. + +.. date: 2023-10-13-16-55-55 +.. gh-issue: 109094 +.. nonce: ziL4cJ +.. section: Core and Builtins + +Replace ``prev_instr`` on the interpreter frame by ``instr_ptr`` which +points to the beginning of the instruction that is currently executing (or +will execute once the frame resumes). + +.. + +.. date: 2023-10-13-09-21-29 +.. gh-issue: 110805 +.. nonce: vhU7A7 +.. section: Core and Builtins + +Allow the repl to show source code and complete tracebacks. Patch by Pablo +Galindo + +.. + +.. date: 2023-10-12-17-15-23 +.. gh-issue: 110722 +.. nonce: sjMwQe +.. section: Core and Builtins + +Add :envvar:`PYTHON_PRESITE=package.module` to import a module early in the +interpreter lifecycle before ``site.py`` is executed. Python needs to be +:ref:`built in debug mode <debug-build>` for this option to exist. + +.. + +.. date: 2023-10-12-12-09-01 +.. gh-issue: 110481 +.. nonce: 3Er3it +.. section: Core and Builtins + +Implement biased reference counting in ``--disable-gil`` builds. + +.. + +.. date: 2023-10-09-19-54-33 +.. gh-issue: 110543 +.. nonce: 1wrxO8 +.. section: Core and Builtins + +Fix regression in Python 3.12 where :meth:`types.CodeType.replace` would +produce a broken code object if called on a module or class code object that +contains a comprehension. Patch by Jelle Zijlstra. + +.. + +.. date: 2023-09-30-17-30-11 +.. gh-issue: 89519 +.. nonce: hz2pZf +.. section: Core and Builtins + +Removed chained :class:`classmethod` descriptors (introduced in +:issue:`19072`). This can no longer be used to wrap other descriptors such +as :class:`property`. The core design of this feature was flawed and caused +a number of downstream problems. To "pass-through" a :class:`classmethod`, +consider using the :attr:`!__wrapped__` attribute that was added in Python +3.10. + +.. + +.. date: 2023-09-15-23-39-43 +.. gh-issue: 103615 +.. nonce: WZavly +.. section: Core and Builtins + +Use local events for opcode tracing + +.. + +.. bpo: 46657 +.. date: 2023-09-06-12-36-11 +.. nonce: xea1T_ +.. section: Core and Builtins + +Add mimalloc memory allocator support. + +.. + +.. date: 2023-08-31-11-42-16 +.. gh-issue: 106718 +.. nonce: _-57DA +.. section: Core and Builtins + +When PyConfig.stdlib_dir is explicitly set, it's now respected and won't be +overridden by PyConfig.home. + +.. + +.. date: 2023-07-20-11-41-16 +.. gh-issue: 106905 +.. nonce: AyZpuB +.. section: Core and Builtins + +Fix incorrect SystemError about AST constructor recursion depth mismatch. + +.. + +.. date: 2022-12-27-02-51-45 +.. gh-issue: 100445 +.. nonce: C8f6ph +.. section: Core and Builtins + +Improve error message for unterminated strings with escapes. + +.. + +.. bpo: 45759 +.. date: 2021-11-10-10-40-05 +.. nonce: WJoB3D +.. section: Core and Builtins + +Improved error messages for ``elif``/``else`` statements not matching any +valid statements. Patch by Jeremiah Vivian. + +.. + +.. date: 2023-11-14-18-43-55 +.. gh-issue: 111942 +.. nonce: x1pnrj +.. section: Library + +Fix SystemError in the TextIOWrapper constructor with non-encodable "errors" +argument in non-debug mode. + +.. + +.. date: 2023-11-14-16-31-59 +.. gh-issue: 111995 +.. nonce: OoX8JJ +.. section: Library + +Added the ``NI_IDN`` constant to the :mod:`socket` module when present in C +at build time for use with :func:`socket.getnameinfo`. + +.. + +.. date: 2023-11-11-16-42-48 +.. gh-issue: 109538 +.. nonce: cMG5ux +.. section: Library + +Issue warning message instead of having :class:`RuntimeError` be displayed +when event loop has already been closed at :meth:`StreamWriter.__del__`. + +.. + +.. date: 2023-11-10-22-08-28 +.. gh-issue: 111942 +.. nonce: MDFm6v +.. section: Library + +Fix crashes in :meth:`io.TextIOWrapper.reconfigure` when pass invalid +arguments, e.g. non-string encoding. + +.. + +.. date: 2023-11-09-12-57-43 +.. gh-issue: 111460 +.. nonce: TQaz9I +.. section: Library + +:mod:`curses`: restore wide character support (including +:func:`curses.unget_wch` and :meth:`~curses.window.get_wch`) on macOS, which +was unavailable due to a regression in Python 3.12. + +.. + +.. date: 2023-11-09-10-45-56 +.. gh-issue: 103791 +.. nonce: sdfkja +.. section: Library + +:class:`contextlib.suppress` now supports suppressing exceptions raised as +part of a :exc:`BaseExceptionGroup`, in addition to the recent support for +:exc:`ExceptionGroup`. + +.. + +.. date: 2023-11-08-23-32-03 +.. gh-issue: 111835 +.. nonce: ufFiuW +.. section: Library + +The :class:`mmap.mmap` class now has an :meth:`~mmap.mmap.seekable` method +that can be used where it requires a file-like object with seekable and the +:meth:`~mmap.mmap.seek` method return the new absolute position. Patch by +Donghee Na. + +.. + +.. date: 2023-11-08-15-58-57 +.. gh-issue: 111804 +.. nonce: uAXTOL +.. section: Library + +Remove posix.fallocate() under WASI as the underlying posix_fallocate() is +not available in WASI preview2. + +.. + +.. date: 2023-11-08-11-50-49 +.. gh-issue: 111841 +.. nonce: iSqdQf +.. section: Library + +Fix truncating arguments on an embedded null character in :meth:`os.putenv` +and :meth:`os.unsetenv` on Windows. + +.. + +.. date: 2023-11-08-07-42-53 +.. gh-issue: 111768 +.. nonce: g-WpnV +.. section: Library + +:func:`wsgiref.util.is_hop_by_hop` is now exposed correctly in ``__all__``. + +.. + +.. date: 2023-11-04-21-12-27 +.. gh-issue: 80731 +.. nonce: Wq51xg +.. section: Library + +Avoid executing the default function in :class:`cmd.Cmd` in an except block + +.. + +.. date: 2023-11-04-10-24-25 +.. gh-issue: 111541 +.. nonce: x0RBI1 +.. section: Library + +Fix :mod:`doctest` for :exc:`SyntaxError` not-builtin subclasses. + +.. + +.. date: 2023-11-04-01-20-23 +.. gh-issue: 111719 +.. nonce: fUiKBD +.. section: Library + +Add extra argument validation for ``alias`` command in :mod:`pdb` + +.. + +.. date: 2023-11-02-12-15-46 +.. gh-issue: 111482 +.. nonce: FWqZIU +.. section: Library + +:mod:`time`: Make :func:`time.clock_gettime()` and +:func:`time.clock_gettime_ns()` functions up to 2x faster by faster calling +convention. Patch by Victor Stinner. + +.. + +.. date: 2023-11-01-14-03-24 +.. gh-issue: 110894 +.. nonce: 7-wZxC +.. section: Library + +Call loop exception handler for exceptions in ``client_connected_cb`` of +:func:`asyncio.start_server` so that applications can handle it. Patch by +Kumar Aditya. + +.. + +.. date: 2023-10-31-07-46-56 +.. gh-issue: 111531 +.. nonce: 6zUV_G +.. section: Library + +Fix reference leaks in ``bind_class()`` and ``bind_all()`` methods of +:mod:`tkinter` widgets. + +.. + +.. date: 2023-10-30-14-47-23 +.. gh-issue: 111246 +.. nonce: QJ_ehs +.. section: Library + +:meth:`asyncio.loop.create_unix_server` will now automatically remove the +Unix socket when the server is closed. + +.. + +.. date: 2023-10-30-08-50-46 +.. gh-issue: 111356 +.. nonce: Bc8LvA +.. section: Library + +Added :func:`io.text_encoding()`, :data:`io.DEFAULT_BUFFER_SIZE`, and +:class:`io.IncrementalNewlineDecoder` to ``io.__all__``. + +.. + +.. date: 2023-10-29-03-46-27 +.. gh-issue: 66425 +.. nonce: FWTdDo +.. section: Library + +Remove the code to set the REMOTE_HOST header from wsgiref module, as it is +unreachable. This header is used for performance reasons, which is not +necessary in the wsgiref module. + +.. + +.. date: 2023-10-28-22-11-11 +.. gh-issue: 111429 +.. nonce: mJGxuQ +.. section: Library + +Speed up :meth:`pathlib.PurePath.relative_to` and +:meth:`~pathlib.PurePath.is_relative_to`. + +.. + +.. date: 2023-10-28-04-21-17 +.. gh-issue: 111342 +.. nonce: m8Ln1k +.. section: Library + +Fixed typo in :func:`math.sumprod`. + +.. + +.. date: 2023-10-27-12-46-56 +.. gh-issue: 68166 +.. nonce: 0EbWW4 +.. section: Library + +Remove mention of not supported "vsapi" element type in +:meth:`tkinter.ttk.Style.element_create`. Add tests for ``element_create()`` +and other ``ttk.Style`` methods. Add examples for ``element_create()`` in +the documentation. + +.. + +.. date: 2023-10-27-09-56-20 +.. gh-issue: 111388 +.. nonce: SlmDbC +.. section: Library + +Add ``show_group`` parameter to :func:`traceback.format_exception_only`, +which allows to format :exc:`ExceptionGroup` instances. + +.. + +.. date: 2023-10-25-11-54-00 +.. gh-issue: 79033 +.. nonce: 5ePgFl +.. section: Library + +Another attempt at fixing :func:`asyncio.Server.wait_closed()`. It now +blocks until both conditions are true: the server is closed, *and* there are +no more active connections. (This means that in some cases where in 3.12.0 +this function would *incorrectly* have returned immediately, it will now +block; in particular, when there are no active connections but the server +hasn't been closed yet.) + +.. + +.. date: 2023-10-25-11-13-35 +.. gh-issue: 111259 +.. nonce: z7ndeA +.. section: Library + +Optimize recursive wildcards in :mod:`pathlib`. + +.. + +.. date: 2023-10-25-08-42-05 +.. gh-issue: 111295 +.. nonce: H2K4lf +.. section: Library + +Fix :mod:`time` not checking for errors when initializing. + +.. + +.. date: 2023-10-24-12-20-46 +.. gh-issue: 111253 +.. nonce: HFywSK +.. section: Library + +Add error checking during :mod:`!_socket` module init. + +.. + +.. date: 2023-10-24-12-09-46 +.. gh-issue: 111251 +.. nonce: urFYtn +.. section: Library + +Fix :mod:`_blake2` not checking for errors when initializing. + +.. + +.. date: 2023-10-23-23-14-54 +.. gh-issue: 111233 +.. nonce: sCdCC0 +.. section: Library + +Fix :mod:`select` not checking for errors when initializing. + +.. + +.. date: 2023-10-23-22-40-47 +.. gh-issue: 111230 +.. nonce: k3Jm84 +.. section: Library + +Fix :mod:`ssl` not checking for errors when initializing. + +.. + +.. date: 2023-10-23-13-53-58 +.. gh-issue: 111174 +.. nonce: Oohmzd +.. section: Library + +Fix crash in :meth:`io.BytesIO.getbuffer` called repeatedly for empty +BytesIO. + +.. + +.. date: 2023-10-22-21-28-05 +.. gh-issue: 111187 +.. nonce: _W11Ab +.. section: Library + +Postpone removal version for locale.getdefaultlocale() to Python 3.15. + +.. + +.. date: 2023-10-21-13-57-06 +.. gh-issue: 111159 +.. nonce: GoHp7s +.. section: Library + +Fix :mod:`doctest` output comparison for exceptions with notes. + +.. + +.. date: 2023-10-20-15-29-10 +.. gh-issue: 110910 +.. nonce: u2oPwX +.. section: Library + +Fix invalid state handling in :class:`asyncio.TaskGroup` and +:class:`asyncio.Timeout`. They now raise proper RuntimeError if they are +improperly used and are left in consistent state after this. + +.. + +.. date: 2023-10-19-22-46-34 +.. gh-issue: 111092 +.. nonce: hgut12 +.. section: Library + +Make turtledemo run without default root enabled. + +.. + +.. date: 2023-10-16-18-41-51 +.. gh-issue: 110944 +.. nonce: CmUKXo +.. section: Library + +Support alias and convenience vars for :mod:`pdb` completion + +.. + +.. date: 2023-10-15-08-08-26 +.. gh-issue: 110745 +.. nonce: mxEkh0 +.. section: Library + +Added *newline* parameter to :meth:`pathlib.Path.read_text`. Patch by Junya +Okabe. + +.. + +.. date: 2023-10-14-21-33-57 +.. gh-issue: 84583 +.. nonce: -Cmn4_ +.. section: Library + +Make :mod:`pdb` enter post-mortem mode even for :exc:`SyntaxError` + +.. + +.. date: 2023-10-14-20-15-53 +.. gh-issue: 80675 +.. nonce: _M-cQC +.. section: Library + +Set ``f_trace_lines = True`` on all frames upon :func:`pdb.set_trace()` + +.. + +.. date: 2023-10-13-06-47-20 +.. gh-issue: 110771 +.. nonce: opwdlc +.. section: Library + +Expose the setup and cleanup portions of ``asyncio.run_forever()`` as the +standalone methods ``asyncio.run_forever_setup()`` and +``asyncio.run_forever_cleanup()``. This allows for tighter integration with +GUI event loops. + +.. + +.. date: 2023-10-12-15-16-44 +.. gh-issue: 110774 +.. nonce: AdCb5A +.. section: Library + +Support setting the :class:`asyncio.Runner` loop_factory kwarg in +:class:`unittest.IsolatedAsyncioTestCase` + +.. + +.. date: 2023-10-10-17-56-41 +.. gh-issue: 110392 +.. nonce: 6g6CnP +.. section: Library + +Fix :func:`tty.setraw` and :func:`tty.setcbreak`: previously they returned +partially modified list of the original tty attributes. +:func:`tty.cfmakeraw` and :func:`tty.cfmakecbreak` now make a copy of the +list of special characters before modifying it. + +.. + +.. date: 2023-10-09-23-59-04 +.. gh-issue: 59013 +.. nonce: qPbS-G +.. section: Library + +Make line number of function breakpoint more precise in :mod:`pdb` + +.. + +.. date: 2023-10-08-18-38-09 +.. gh-issue: 88434 +.. nonce: 2Q_IkG +.. section: Library + +Emit deprecation warning for non-integer numbers in :mod:`gettext` functions +and methods that consider plural forms even if the translation was not +found. + +.. + +.. date: 2023-10-08-14-17-06 +.. gh-issue: 110395 +.. nonce: _tdCsV +.. section: Library + +Ensure that :func:`select.kqueue` objects correctly appear as closed in +forked children, to prevent operations on an invalid file descriptor. + +.. + +.. date: 2023-10-02-05-23-27 +.. gh-issue: 110196 +.. nonce: djwt0z +.. section: Library + +Add ``__reduce__`` method to :class:`IPv6Address` in order to keep +``scope_id`` + +.. + +.. date: 2023-09-25-20-05-41 +.. gh-issue: 109747 +.. nonce: _cRJH8 +.. section: Library + +Improve errors for unsupported look-behind patterns. Now re.error is raised +instead of OverflowError or RuntimeError for too large width of look-behind +pattern. + +.. + +.. date: 2023-09-15-12-30-21 +.. gh-issue: 109466 +.. nonce: 6ah-aw +.. section: Library + +Add the :attr:`ipaddress.IPv4Address.ipv6_mapped` property, which retuns the +IPv4-mapped IPv6 address. + +.. + +.. date: 2023-09-08-12-10-10 +.. gh-issue: 85098 +.. nonce: DfQbeJ +.. section: Library + +Implement the CLI of the :mod:`symtable` module and improve the repr of +:class:`~symtable.Symbol`. + +.. + +.. date: 2023-09-02-16-07-23 +.. gh-issue: 108791 +.. nonce: fBcAqh +.. section: Library + +Improved error handling in :mod:`pdb` command line interface, making it +produce more concise error messages. + +.. + +.. date: 2023-08-30-19-10-35 +.. gh-issue: 105931 +.. nonce: Lpwve8 +.. section: Library + +Change :mod:`compileall` to only strip the stripdir prefix from the full +path recorded in the compiled ``.pyc`` file, when the prefix matches the +start of the full path in its entirety. When the prefix does not match, no +stripping is performed and a warning to this effect is displayed. + +Previously all path components of the stripdir prefix that matched the full +path were removed, while those that did not match were left alone (including +ones interspersed between matching components). + +.. + +.. date: 2023-07-29-19-00-39 +.. gh-issue: 107431 +.. nonce: 1GzJ2p +.. section: Library + +Make the ``DictProxy`` and ``ListProxy`` types in +:mod:`multiprocessing.managers` :ref:`Generic Alias +Types<types-genericalias>` for ``[]`` use in typing contexts. + +.. + +.. date: 2023-07-13-00-24-52 +.. gh-issue: 72904 +.. nonce: Yn5-j0 +.. section: Library + +Add :func:`glob.translate`. This function converts a pathname with +shell-style wildcards to a regular expression. + +.. + +.. date: 2023-05-30-02-01-14 +.. gh-issue: 90026 +.. nonce: FyCXw8 +.. section: Library + +Define ``USE_XATTRS`` on Cygwin so that XATTR-related functions in the +:mod:`os` module become available. + +.. + +.. date: 2023-04-26-16-37-00 +.. gh-issue: 90890 +.. nonce: fIag4w +.. section: Library + +New methods :meth:`mailbox.Maildir.get_info`, +:meth:`mailbox.Maildir.set_info`, :meth:`mailbox.Maildir.get_flags`, +:meth:`mailbox.Maildir.set_flags`, :meth:`mailbox.Maildir.add_flag`, +:meth:`mailbox.Maildir.remove_flag`. These methods speed up accessing a +message's info and/or flags and are useful when it is not necessary to +access the message's contents, as when iterating over a Maildir to find +messages with specific flags. + +.. + +.. date: 2023-04-15-14-45-21 +.. gh-issue: 102956 +.. nonce: Z6qeUy +.. section: Library + +Fix returning of empty byte strings after seek in zipfile module + +.. + +.. date: 2023-03-22-02-01-30 +.. gh-issue: 102895 +.. nonce: HiEqaZ +.. section: Library + +Added a parameter ``local_exit`` for :func:`code.interact` to prevent +``exit()`` and ``quit`` from closing ``sys.stdin`` and raise ``SystemExit``. + +.. + +.. date: 2022-10-14-21-11-10 +.. gh-issue: 97928 +.. nonce: Pdxh1G +.. section: Library + +Change the behavior of :meth:`tkinter.Text.count`. It now always returns an +integer if one or less counting options are specified. Previously it could +return a single count as a 1-tuple, an integer (only if option ``"update"`` +was specified) or ``None`` if no items found. The result is now the same if +``wantobjects`` is set to ``0``. + +.. + +.. date: 2022-10-05-15-01-36 +.. gh-issue: 96954 +.. nonce: ezwkrU +.. section: Library + +Switch the storage of the unicode codepoint names to use a different +data-structure, a `directed acyclic word graph +<https://en.wikipedia.org/wiki/Deterministic_acyclic_finite_state_automaton>`_. +This makes the unicodedata shared library about 440 KiB smaller. Contributed +by Carl Friedrich Bolz-Tereick using code from the PyPy project. + +.. + +.. date: 2022-05-28-20-55-07 +.. gh-issue: 73561 +.. nonce: YRmAvy +.. section: Library + +Omit the interface scope from an IPv6 address when used as Host header by +:mod:`http.client`. + +.. + +.. date: 2022-05-06-15-49-57 +.. gh-issue: 86826 +.. nonce: rf006W +.. section: Library + +:mod:`zipinfo` now supports the full range of values in the TZ string +determined by RFC 8536 and detects all invalid formats. Both Python and C +implementations now raise exceptions of the same type on invalid data. + +.. + +.. date: 2023-11-17-15-20-41 +.. gh-issue: 111808 +.. nonce: jtIayt +.. section: Tests + +Make the default value of ``test.support.infinite_recursion()`` to be +conditional based on whether optimizations were used when compiling the +interpreter. This helps with platforms like WASI whose stack size is greatly +restricted in debug builds. + +.. + +.. date: 2023-11-03-18-59-13 +.. gh-issue: 110722 +.. nonce: jvT1pb +.. section: Tests + +Gathering line coverage of standard libraries within the regression test +suite is now precise, as well as much faster. Patch by Łukasz Langa. + +.. + +.. date: 2023-10-31-22-09-25 +.. gh-issue: 110367 +.. nonce: UhQi44 +.. section: Tests + +Make regrtest ``--verbose3`` option compatible with ``--huntrleaks -jN`` +options. The ``./python -m test -j1 -R 3:3 --verbose3`` command now works as +expected. Patch by Victor Stinner. + +.. + +.. date: 2023-10-21-19-27-36 +.. gh-issue: 111165 +.. nonce: FU6mUk +.. section: Tests + +Remove no longer used functions ``run_unittest()`` and ``run_doctest()`` +from the :mod:`test.support` module. + +.. + +.. date: 2023-10-21-00-10-36 +.. gh-issue: 110932 +.. nonce: jktjJU +.. section: Tests + +Fix regrtest if the ``SOURCE_DATE_EPOCH`` environment variable is defined: +use the variable value as the random seed. Patch by Victor Stinner. + +.. + +.. date: 2023-10-17-17-54-36 +.. gh-issue: 110995 +.. nonce: Fx8KRD +.. section: Tests + +test_gdb: Fix detection of gdb built without Python scripting support. Patch +by Victor Stinner. + +.. + +.. date: 2023-10-16-13-47-24 +.. gh-issue: 110918 +.. nonce: aFgZK3 +.. section: Tests + +Test case matching patterns specified by options ``--match``, ``--ignore``, +``--matchfile`` and ``--ignorefile`` are now tested in the order of +specification, and the last match determines whether the test case be run or +ignored. + +.. + +.. date: 2023-09-15-15-00-14 +.. gh-issue: 108747 +.. nonce: ql0owS +.. section: Tests + +Add unit test for ``usercustomize`` and ``sitecustomize`` hooks from +:class:`site`. + +.. + +.. date: 2023-11-15-16-56-20 +.. gh-issue: 96954 +.. nonce: 6FYvKn +.. section: Build + +Make ``make regen-unicodedata`` work for out-of-tree builds of CPython. + +.. + +.. date: 2023-11-15-13-40-29 +.. gh-issue: 112088 +.. nonce: UJQxxh +.. section: Build + +Add ``Tools/build/regen-configure.sh`` script to regenerate the +``configure`` with an Ubuntu container image. The +``quay.io/tiran/cpython_autoconf:271`` container image +(`tiran/cpython_autoconf <https://github.com/tiran/cpython_autoconf>`_) is +no longer used. Patch by Victor Stinner. + +.. + +.. date: 2023-10-20-15-29-31 +.. gh-issue: 111046 +.. nonce: 2DxQl8 +.. section: Build + +For wasi-threads, memory is now exported to fix compatibility issues with +some wasm runtimes. + +.. + +.. date: 2023-10-17-03-10-40 +.. gh-issue: 110828 +.. nonce: 31vQ9B +.. section: Build + +AIX 32bit needs ``-latomic`` to build the :mod:`!_testcapi` extension +module. + +.. + +.. date: 2023-10-17-01-56-11 +.. gh-issue: 85283 +.. nonce: V156T2 +.. section: Build + +The ``errno``, ``md5``, ``resource``, ``winsound``, ``_ctypes_test``, +``_multiprocessing.posixshmem``, ``_scproxy``, ``_stat``, +``_testimportmultiple`` and ``_uuid`` C extensions are now built with the +:ref:`limited C API <limited-c-api>`. Patch by Victor Stinner. + +.. + +.. date: 2023-11-13-22-35-27 +.. gh-issue: 111856 +.. nonce: vEtA5z +.. section: Windows + +Fixes :func:`~os.fstat` on file systems that do not support file ID +requests. This includes FAT32 and exFAT. + +.. + +.. date: 2023-10-25-05-01-28 +.. gh-issue: 111293 +.. nonce: FSsLT6 +.. section: Windows + +Fix :data:`os.DirEntry.inode` dropping higher 64 bits of a file id on some +filesystems on Windows. + +.. + +.. date: 2023-10-19-21-46-18 +.. gh-issue: 110913 +.. nonce: CWlPfg +.. section: Windows + +WindowsConsoleIO now correctly chunks large buffers without splitting up +UTF-8 sequences. + +.. + +.. date: 2023-10-31-22-13-05 +.. gh-issue: 59703 +.. nonce: SML6Ag +.. section: macOS + +For macOS framework builds, in ``getpath.c`` use the system ``dladdr`` +function to find the path to the shared library rather than depending on +deprecated macOS APIs. + +.. + +.. date: 2023-10-18-17-26-36 +.. gh-issue: 110950 +.. nonce: sonoma +.. section: macOS + +Update macOS installer to include an upstream Tcl/Tk fix for the ``Secure +coding is not enabled for restorable state!`` warning encountered in Tkinter +on macOS 14 Sonoma. + +.. + +.. date: 2023-10-18-01-40-36 +.. gh-issue: 111015 +.. nonce: NaLI2L +.. section: macOS + +Ensure that IDLE.app and Python Launcher.app are installed with appropriate +permissions on macOS builds. + +.. + +.. date: 2023-09-02-08-49-57 +.. gh-issue: 71383 +.. nonce: Ttkchg +.. section: macOS + +Update macOS installer to include an upstream Tcl/Tk fix for the +``ttk::ThemeChanged`` error encountered in Tkinter. + +.. + +.. date: 2023-08-30-16-33-57 +.. gh-issue: 92603 +.. nonce: ATkKVO +.. section: macOS + +Update macOS installer to include a fix accepted by upstream Tcl/Tk for a +crash encountered after the first :meth:`tkinter.Tk` instance is destroyed. + +.. + +.. bpo: 35668 +.. date: 2019-01-07-06-18-25 +.. nonce: JimxP5 +.. section: IDLE + +Add docstrings to the IDLE debugger module. Fix two bugs: initialize +Idb.botframe (should be in Bdb); in Idb.in_rpc_code, check whether +prev_frame is None before trying to use it. Greatly expand test_debugger. + +.. + +.. date: 2023-11-09-13-04-29 +.. gh-issue: 111903 +.. nonce: 7Prryr +.. section: Tools/Demos + +Argument Clinic now supports the ``@critical_section`` directive that +instructs Argument Clinic to generate a critical section around the function +call, which locks the ``self`` object in ``--disable-gil`` builds. Patch by +Sam Gross. + +.. + +.. date: 2023-11-15-18-36-21 +.. gh-issue: 112026 +.. nonce: _Yybr5 +.. section: C API + +Add again the private ``_PyThreadState_UncheckedGet()`` function as an alias +to the new public :c:func:`PyThreadState_GetUnchecked` function. Patch by +Victor Stinner. + +.. + +.. date: 2023-11-15-17-10-09 +.. gh-issue: 112026 +.. nonce: ts9yyn +.. section: C API + +Restore the removed ``_PyDict_GetItemStringWithError()`` function. It is +used by numpy. Patch by Victor Stinner. + +.. + +.. date: 2023-11-15-16-07-57 +.. gh-issue: 112026 +.. nonce: bnr8dd +.. section: C API + +Restore removed private C API functions, macros and structures which have no +simple replacement for now: + +* _PyDict_GetItem_KnownHash() +* _PyDict_NewPresized() +* _PyHASH_BITS +* _PyHASH_IMAG +* _PyHASH_INF +* _PyHASH_MODULUS +* _PyHASH_MULTIPLIER +* _PyLong_Copy() +* _PyLong_FromDigits() +* _PyLong_New() +* _PyLong_Sign() +* _PyObject_CallMethodId() +* _PyObject_CallMethodNoArgs() +* _PyObject_CallMethodOneArg() +* _PyObject_CallOneArg() +* _PyObject_EXTRA_INIT +* _PyObject_FastCallDict() +* _PyObject_GetAttrId() +* _PyObject_Vectorcall() +* _PyObject_VectorcallMethod() +* _PyStack_AsDict() +* _PyThread_CurrentFrames() +* _PyUnicodeWriter structure +* _PyUnicodeWriter_Dealloc() +* _PyUnicodeWriter_Finish() +* _PyUnicodeWriter_Init() +* _PyUnicodeWriter_Prepare() +* _PyUnicodeWriter_PrepareKind() +* _PyUnicodeWriter_WriteASCIIString() +* _PyUnicodeWriter_WriteChar() +* _PyUnicodeWriter_WriteLatin1String() +* _PyUnicodeWriter_WriteStr() +* _PyUnicodeWriter_WriteSubstring() +* _PyUnicode_AsString() +* _PyUnicode_FromId() +* _PyVectorcall_Function() +* _Py_IDENTIFIER() +* _Py_c_abs() +* _Py_c_diff() +* _Py_c_neg() +* _Py_c_pow() +* _Py_c_prod() +* _Py_c_quot() +* _Py_c_sum() +* _Py_static_string() +* _Py_static_string_init() + +Patch by Victor Stinner. + +.. + +.. date: 2023-11-13-17-57-11 +.. gh-issue: 112026 +.. nonce: WJLJcI +.. section: C API + +Add again ``<ctype.h>`` and ``<unistd.h>`` includes in ``Python.h``, but +don't include them in the limited C API version 3.13 and newer. Patch by +Victor Stinner. + +.. + +.. date: 2023-11-10-10-24-28 +.. gh-issue: 111956 +.. nonce: ImE6Cx +.. section: C API + +Add internal-only one-time initialization API: ``_PyOnceFlag`` and +``_PyOnceFlag_CallOnce``. + +.. + +.. date: 2023-11-10-10-21-38 +.. gh-issue: 111262 +.. nonce: 2utB5m +.. section: C API + +Add :c:func:`PyDict_Pop` and :c:func:`PyDict_PopString` functions: remove a +key from a dictionary and optionally return the removed value. This is +similar to :meth:`dict.pop`, but without the default value and not raising +:exc:`KeyError` if the key missing. Patch by Stefan Behnel and Victor +Stinner. + +.. + +.. date: 2023-11-08-20-28-03 +.. gh-issue: 111863 +.. nonce: RPeFAX +.. section: C API + +Rename ``Py_NOGIL`` to ``Py_GIL_DISABLED``. Patch by Hugo van Kemenade. + +.. + +.. date: 2023-11-08-18-37-19 +.. gh-issue: 111138 +.. nonce: 3Ypq8h +.. section: C API + +Add :c:func:`PyList_Extend` and :c:func:`PyList_Clear` functions: similar to +Python ``list.extend()`` and ``list.clear()`` methods. Patch by Victor +Stinner. + +.. + +.. date: 2023-10-31-18-22-03 +.. gh-issue: 108765 +.. nonce: _beYv8 +.. section: C API + +On Windows, ``Python.h`` no longer includes the ``<stddef.h>`` standard +header file. If needed, it should now be included explicitly. Patch by +Victor Stinner. + +.. + +.. date: 2023-10-31-14-58-17 +.. gh-issue: 111569 +.. nonce: _V8iu4 +.. section: C API + +Implement "Python Critical Sections" from :pep:`703`. These are macros to +help replace the GIL with per-object locks in the ``--disable-gil`` build of +CPython. The macros are no-ops in the default build. + +.. + +.. date: 2023-10-30-18-13-01 +.. gh-issue: 111506 +.. nonce: EUdO22 +.. section: C API + +In the limited C API version 3.13, :c:func:`Py_SET_REFCNT` function is now +implemented as an opaque function call. Patch by Victor Stinner. + +.. + +.. date: 2023-10-19-22-39-24 +.. gh-issue: 108082 +.. nonce: uJytvc +.. section: C API + +Add :c:func:`PyErr_FormatUnraisable` function. + +.. + +.. date: 2023-10-17-10-21-59 +.. gh-issue: 110964 +.. nonce: OxqEjd +.. section: C API + +Move the undocumented private _PyArg functions and _PyArg_Parser structure +to internal C API (``pycore_modsupport.h``). Patch by Victor Stinner. + +.. + +.. date: 2023-10-13-14-18-06 +.. gh-issue: 110815 +.. nonce: tEFLVl +.. section: C API + +Support non-ASCII keyword names in :c:func:`PyArg_ParseTupleAndKeywords`. + +.. + +.. date: 2023-10-02-23-08-53 +.. gh-issue: 109587 +.. nonce: UqqnDY +.. section: C API + +Introduced :c:func:`PyUnstable_PerfTrampoline_CompileCode`, +:c:func:`PyUnstable_PerfTrampoline_SetPersistAfterFork` and +:c:func:`PyUnstable_CopyPerfMapFile`. These functions allow extension +modules to initialize trampolines eagerly, after the application is "warmed +up". This makes it possible to have perf-trampolines running in an +always-enabled fashion. + +.. + +.. date: 2023-08-28-17-40-51 +.. gh-issue: 85283 +.. nonce: raFNiD +.. section: C API + +Add the :c:func:`PySys_Audit` function to the limited C API. Patch by Victor +Stinner. + +.. + +.. date: 2023-08-28-17-34-10 +.. gh-issue: 85283 +.. nonce: f1zXcc +.. section: C API + +Add :c:func:`PyMem_RawMalloc`, :c:func:`PyMem_RawCalloc`, +:c:func:`PyMem_RawRealloc` and :c:func:`PyMem_RawFree` to the limited C API. +Patch by Victor Stinner. + +.. + +.. date: 2023-07-12-12-14-52 +.. gh-issue: 106672 +.. nonce: fkRjmi +.. section: C API + +Functions :c:func:`PyDict_GetItem`, :c:func:`PyDict_GetItemString`, +:c:func:`PyMapping_HasKey`, :c:func:`PyMapping_HasKeyString`, +:c:func:`PyObject_HasAttr`, :c:func:`PyObject_HasAttrString`, and +:c:func:`PySys_GetObject`, which clear all errors occurred during calling +the function, report now them using :func:`sys.unraisablehook`. + +.. + +.. date: 2023-06-08-21-12-44 +.. gh-issue: 67565 +.. nonce: UkK3x- +.. section: C API + +Remove redundant C-contiguity check in :file:`getargs.c`, :mod:`binascii`, +:mod:`ssl` and Argument Clinic. Patched by Stefan Krah and Furkan Onder |