.. date: 2022-09-28-17-09-37 .. gh-issue: 97616 .. nonce: K1e3Xs .. release date: 2022-10-25 .. section: Security Fix multiplying a list by an integer (``list *= int``): detect the integer overflow when the new allocated length is close to the maximum size. Issue reported by Jordan Limor. Patch by Victor Stinner. .. .. date: 2022-09-07-10-42-00 .. gh-issue: 97514 .. nonce: Yggdsl .. section: Security On Linux the :mod:`multiprocessing` module returns to using filesystem backed unix domain sockets for communication with the *forkserver* process instead of the Linux abstract socket namespace. Only code that chooses to use the :ref:`"forkserver" start method ` is affected. Abstract sockets have no permissions and could allow any user on the system in the same `network namespace `_ (often the whole system) to inject code into the multiprocessing *forkserver* process. This was a potential privilege escalation. Filesystem based socket permissions restrict this to the *forkserver* process user as was the default in Python 3.8 and earlier. This prevents Linux `CVE-2022-42919 `_. .. .. date: 2022-06-15-20-09-23 .. gh-issue: 87389 .. nonce: QVaC3f .. section: Security :mod:`http.server`: Fix an open redirection vulnerability in the HTTP server when an URI path starts with ``//``. Vulnerability discovered, and initial fix proposed, by Hamza Avvan. .. .. date: 2022-06-03-12-52-53 .. gh-issue: 79096 .. nonce: YVoxgC .. section: Security LWPCookieJar and MozillaCookieJar create files with file mode 600 instead of 644 (Microsoft Windows is not affected) .. .. date: 2022-05-19-08-53-07 .. gh-issue: 92888 .. nonce: TLtR9W .. section: Security Fix ``memoryview`` use after free when accessing the backing buffer in certain cases. .. .. date: 2022-04-27-18-25-30 .. gh-issue: 68966 .. nonce: gjS8zs .. section: Security The deprecated mailcap module now refuses to inject unsafe text (filenames, MIME types, parameters) into shell commands. Instead of using such text, it will warn and act as if a match was not found (or for test commands, as if the test failed). .. .. date: 2022-10-19-23-48-46 .. gh-issue: 98374 .. nonce: eOBh8M .. section: Core and Builtins Suppress ImportError for invalid query for help() command. Patch by Dong-hee Na. .. .. date: 2022-10-19-20-53-38 .. gh-issue: 98461 .. nonce: iNmPDV .. section: Core and Builtins Fix source location in bytecode for list, set and dict comprehensions as well as generator expressions. .. .. date: 2022-10-19-18-03-28 .. gh-issue: 98354 .. nonce: GRGta3 .. section: Core and Builtins Added unicode check for ``name`` attribute of ``spec`` argument passed in :func:`_imp.create_builtin` function. .. .. date: 2022-10-18-16-17-44 .. gh-issue: 98398 .. nonce: x4rYK_ .. section: Core and Builtins Fix source location of 'assert' bytecodes. .. .. date: 2022-10-18-14-11-32 .. gh-issue: 98390 .. nonce: H1sxJu .. section: Core and Builtins Fix location of sub-expressions of boolean expressions, by reducing their scope to that of the sub-expression. .. .. date: 2022-10-13-23-23-01 .. gh-issue: 98254 .. nonce: bC8IKt .. section: Core and Builtins Modules from the standard library are now potentially suggested as part of the error messages displayed by the interpreter when an :exc:`NameError` is raised to the top level. Patch by Pablo Galindo .. .. date: 2022-10-06-23-13-34 .. gh-issue: 97997 .. nonce: JQaJKF .. section: Core and Builtins Add running column offset to the tokenizer state to avoid calculating AST column information with pointer arithmetic. .. .. date: 2022-10-06-20-41-29 .. gh-issue: 97973 .. nonce: gB-xWi .. section: Core and Builtins Modify the tokenizer to return all necessary information the parser needs to set location information in the AST nodes, so that the parser does not have to calculate those doing pointer arithmetic. .. .. date: 2022-10-06-15-45-57 .. gh-issue: 96078 .. nonce: fS-6mU .. section: Core and Builtins :func:`os.sched_yield` now release the GIL while calling sched_yield(2). Patch by Dong-hee Na. .. .. date: 2022-10-06-14-14-28 .. gh-issue: 97955 .. nonce: Nq5VXD .. section: Core and Builtins Migrate :mod:`zoneinfo` to Argument Clinic. .. .. date: 2022-10-06-06-36-29 .. gh-issue: 97912 .. nonce: jGRJpa .. section: Core and Builtins The compiler now avoids quadratic behavior when finding which instructions should use the :opcode:`LOAD_FAST_CHECK` opcode. .. .. date: 2022-10-06-02-11-34 .. gh-issue: 97002 .. nonce: Zvsk71 .. section: Core and Builtins Fix an issue where several frame objects could be backed by the same interpreter frame, possibly leading to corrupted memory and hard crashes of the interpreter. .. .. date: 2022-10-05-17-02-22 .. gh-issue: 97943 .. nonce: LYAWlE .. section: Core and Builtins Bugfix: :c:func:`PyFunction_GetAnnotations` should return a borrowed reference. It was returning a new reference. .. .. date: 2022-10-05-11-37-15 .. gh-issue: 97922 .. nonce: Zu9Bge .. section: Core and Builtins The Garbage Collector now runs only on the eval breaker mechanism of the Python bytecode evaluation loop instead on object allocations. The GC can also run when :c:func:`PyErr_CheckSignals` is called so C extensions that need to run for a long time without executing any Python code also have a chance to execute the GC periodically. .. .. date: 2022-10-05-00-37-27 .. gh-issue: 65961 .. nonce: z0Ys0y .. section: Core and Builtins When ``__package__`` is different than ``__spec__.parent``, raise a ``DeprecationWarning`` instead of ``ImportWarning``. Also remove ``importlib.util.set_package()`` which was scheduled for removal. .. .. date: 2022-10-04-17-02-18 .. gh-issue: 97850 .. nonce: E3QTRA .. section: Core and Builtins Long deprecated, ``module_repr()`` should now be completely eradicated. .. .. date: 2022-10-04-14-04-40 .. gh-issue: 86298 .. nonce: QVM7G1 .. section: Core and Builtins In cases where ``warnings.warn_explicit()`` consults the module's loader, an ``DeprecationWarning`` is issued when ``m.__loader__`` differs from ``m.__spec__.loader``. .. .. date: 2022-10-04-02-00-10 .. gh-issue: 97779 .. nonce: f3N1hI .. section: Core and Builtins Ensure that all Python frame objects are backed by "complete" frames. .. .. date: 2022-10-03-16-12-39 .. gh-issue: 91052 .. nonce: MsYL9d .. section: Core and Builtins Add API for subscribing to modification events on selected dictionaries. .. .. date: 2022-10-03-13-35-48 .. gh-issue: 97752 .. nonce: 0xTjJY .. section: Core and Builtins Fix possible data corruption or crashes when accessing the ``f_back`` member of newly-created generator or coroutine frames. .. .. date: 2022-10-01-08-55-09 .. gh-issue: 97591 .. nonce: pw6kkH .. section: Core and Builtins Fixed a missing incref/decref pair in ``Exception.__setstate__()``. Patch by Ofey Chan. .. .. date: 2022-09-30-13-26-58 .. gh-issue: 97670 .. nonce: n61vMR .. section: Core and Builtins Remove the :func:`sys.getdxp` function and the ``Tools/scripts/analyze_dxp.py`` script. DXP stands for "dynamic execution pairs". They were related to ``DYNAMIC_EXECUTION_PROFILE`` and ``DXPAIRS`` macros which have been removed in Python 3.11. Python can now be built with :option:`./configure --enable-pystats <--enable-pystats>` to gather statistics on Python opcodes. Patch by Victor Stinner. .. .. date: 2022-09-29-15-19-29 .. gh-issue: 94526 .. nonce: wq5m6T .. section: Core and Builtins Fix the Python path configuration used to initialized :data:`sys.path` at Python startup. Paths are no longer encoded to UTF-8/strict to avoid encoding errors if it contains surrogate characters (bytes paths are decoded with the surrogateescape error handler). Patch by Victor Stinner. .. .. date: 2022-09-27-11-59-13 .. gh-issue: 96670 .. nonce: XrBBit .. section: Core and Builtins The parser now raises :exc:`SyntaxError` when parsing source code containing null bytes. Patch by Pablo Galindo .. .. date: 2022-09-21-16-06-37 .. gh-issue: 96975 .. nonce: BmE0XY .. section: Core and Builtins Fix a crash occurring when :c:func:`PyEval_GetFrame` is called while the topmost Python frame is in a partially-initialized state. .. .. date: 2022-09-21-14-38-31 .. gh-issue: 96848 .. nonce: WuoLzU .. section: Core and Builtins Fix command line parsing: reject :option:`-X int_max_str_digits <-X>` option with no value (invalid) when the :envvar:`PYTHONINTMAXSTRDIGITS` environment variable is set to a valid limit. Patch by Victor Stinner. .. .. date: 2022-09-20-11-06-45 .. gh-issue: 95921 .. nonce: dkcRQn .. section: Core and Builtins Fix overly-broad source position information for chained comparisons used as branching conditions. .. .. date: 2022-09-19-03-35-01 .. gh-issue: 96821 .. nonce: izK6JA .. section: Core and Builtins Fix undefined behaviour in ``audioop.c``. .. .. date: 2022-09-18-08-47-40 .. gh-issue: 96821 .. nonce: Co2iOq .. section: Core and Builtins Fix undefined behaviour in ``_testcapimodule.c``. .. .. date: 2022-09-16-19-02-40 .. gh-issue: 95778 .. nonce: cJmnst .. section: Core and Builtins When :exc:`ValueError` is raised if an integer is larger than the limit, mention the :func:`sys.set_int_max_str_digits` function in the error message. Patch by Victor Stinner. .. .. date: 2022-09-16-16-54-35 .. gh-issue: 96387 .. nonce: GRzewg .. section: Core and Builtins At Python exit, sometimes a thread holding the GIL can wait forever for a thread (usually a daemon thread) which requested to drop the GIL, whereas the thread already exited. To fix the race condition, the thread which requested the GIL drop now resets its request before exiting. Issue discovered and analyzed by Mingliang ZHAO. Patch by Victor Stinner. .. .. date: 2022-09-16-12-36-13 .. gh-issue: 96864 .. nonce: PLU3i8 .. section: Core and Builtins Fix a possible assertion failure, fatal error, or :exc:`SystemError` if a line tracing event raises an exception while opcode tracing is enabled. .. .. date: 2022-09-13-21-45-07 .. gh-issue: 95778 .. nonce: Oll4_5 .. section: Core and Builtins The ``PyLong_FromString`` function was refactored to make it more maintainable and extensible. .. .. date: 2022-09-13-12-06-46 .. gh-issue: 96678 .. nonce: NqGFyb .. section: Core and Builtins Fix undefined behaviour in C code of null pointer arithmetic. .. .. date: 2022-09-12-16-58-22 .. gh-issue: 96754 .. nonce: 0GRme5 .. section: Core and Builtins Make sure that all frame objects created are created from valid interpreter frames. Prevents the possibility of invalid frames in backtraces and signal handlers. .. .. date: 2022-09-12-15-15-04 .. gh-issue: 90997 .. nonce: sZO8c9 .. section: Core and Builtins Improve the performance of reading and writing inline bytecode caches on some platforms. .. .. date: 2022-09-11-12-43-43 .. gh-issue: 96751 .. nonce: anRT6a .. section: Core and Builtins Remove dead code from ``CALL_FUNCTION_EX`` opcode. .. .. date: 2022-09-11-00-37-50 .. gh-issue: 90751 .. nonce: VE8-zf .. section: Core and Builtins :class:`memoryview` now supports half-floats. Patch by Dong-hee Na and Antoine Pitrou. .. .. date: 2022-09-09-13-13-27 .. gh-issue: 96678 .. nonce: vMxi9F .. section: Core and Builtins Fix case of undefined behavior in ceval.c .. .. date: 2022-09-08-20-58-10 .. gh-issue: 64373 .. nonce: AfCi36 .. section: Core and Builtins Convert :mod:`_functools` to argument clinic. .. .. date: 2022-09-07-13-38-37 .. gh-issue: 96641 .. nonce: wky0Fc .. section: Core and Builtins Do not expose ``KeyWrapper`` in :mod:`_functools`. .. .. date: 2022-09-07-12-02-11 .. gh-issue: 96636 .. nonce: YvN-K6 .. section: Core and Builtins Ensure that tracing, ``sys.setrace()``, is turned on immediately. In pre-release versions of 3.11, some tracing events might have been lost when turning on tracing in a ``__del__`` method or interrupt. .. .. date: 2022-09-06-16-54-49 .. gh-issue: 96572 .. nonce: 8DRsaW .. section: Core and Builtins Fix use after free in trace refs build mode. Patch by Kumar Aditya. .. .. date: 2022-09-06-16-22-13 .. gh-issue: 96611 .. nonce: 14wIX8 .. section: Core and Builtins When loading a file with invalid UTF-8 inside a multi-line string, a correct SyntaxError is emitted. .. .. date: 2022-09-06-14-26-36 .. gh-issue: 96612 .. nonce: P4ZbeY .. section: Core and Builtins Make sure that incomplete frames do not show up in tracemalloc traces. .. .. date: 2022-09-06-11-19-03 .. gh-issue: 90230 .. nonce: YOtzs5 .. section: Core and Builtins Fix compiler warnings and test failures when building with ``--enable-pystats``. .. .. date: 2022-09-05-19-20-44 .. gh-issue: 96587 .. nonce: bVxhX2 .. section: Core and Builtins Correctly raise ``SyntaxError`` on exception groups (:pep:`654`) on python versions prior to 3.11 .. .. date: 2022-09-05-16-43-44 .. gh-issue: 96569 .. nonce: 9lmTCC .. section: Core and Builtins Remove two cases of undefined behavoir, by adding NULL checks. .. .. date: 2022-09-05-15-07-25 .. gh-issue: 96582 .. nonce: HEsL5s .. section: Core and Builtins Fix possible ``NULL`` pointer dereference in ``_PyThread_CurrentFrames``. Patch by Kumar Aditya. .. .. date: 2022-09-05-09-56-32 .. gh-issue: 91079 .. nonce: H4-DdU .. section: Core and Builtins Separate Python recursion checking from C recursion checking which reduces the chance of C stack overflow and allows the recursion limit to be increased safely. .. .. date: 2022-09-02-16-47-52 .. gh-issue: 93911 .. nonce: vF-GWe .. section: Core and Builtins Fix an issue that could prevent :opcode:`LOAD_ATTR` from specializing properly when accessing properties. .. .. date: 2022-08-31-18-46-13 .. gh-issue: 96348 .. nonce: xzCoTP .. section: Core and Builtins Emit a DeprecationWarning when :meth:`~generator.throw`, :meth:`~coroutine.throw` or :meth:`~agen.athrow` are called with more than one argument. .. .. date: 2022-08-29-13-06-58 .. gh-issue: 95196 .. nonce: eGRR4b .. section: Core and Builtins Disable incorrect pickling of the C implemented classmethod descriptors. .. .. date: 2022-08-29-00-37-21 .. gh-issue: 96364 .. nonce: c-IVyb .. section: Core and Builtins Fix text signatures of ``list.__getitem__`` and ``dict.__getitem__``. .. .. date: 2022-08-28-10-51-19 .. gh-issue: 96352 .. nonce: jTLD2d .. section: Core and Builtins Fix :exc:`AttributeError` missing ``name`` and ``obj`` attributes in :meth:`object.__getattribute__`. Patch by Philip Georgi. .. .. date: 2022-08-26-18-46-32 .. gh-issue: 93554 .. nonce: QEaCcK .. section: Core and Builtins Change the jump opcodes so that all conditional jumps are forward jumps. Backward jumps are converted by the assembler into a conditional forward jump whose target is the fallthrough block (and with a reversed condition), followed by an unconditional backward jump. For example: ``POP_JUMP_IF_TRUE BACKWARD_TARGET`` becomes ``POP_JUMP_IF_FALSE NEXT_BLOCK; JUMP BACKWARD_TARGET``. All the directed conditional jump opcodes were removed: ``POP_JUMP_FORWARD_IF_TRUE``, ``POP_JUMP_BACKWARD_IF_TRUE``, ``POP_JUMP_FORWARD_IF_FALSE``, ``POP_JUMP_BACKWARD_IF_FALSE``, ``POP_JUMP_FORWARD_IF_NONE``, ``POP_JUMP_BACKWARD_IF_NONE``, ``POP_JUMP_FORWARD_IF_NOT_NONE``, ``POP_JUMP_BACKWARD_IF_NOT_NONE``. The corresponding opcodes without direction are no longer pseudo-instructions, and they implement the forward conditional jumps. .. .. date: 2022-08-25-10-19-34 .. gh-issue: 96268 .. nonce: AbYrLB .. section: Core and Builtins Loading a file with invalid UTF-8 will now report the broken character at the correct location. .. .. date: 2022-08-24-14-30-26 .. gh-issue: 96237 .. nonce: msif5f .. section: Core and Builtins The internal field ``_PyInterpreterFrame.f_func`` is renamed to ``_PyInterpreterFrame.f_funcobj`` and may be any object. The ``f_globals`` and ``f_builtin`` fields may hold junk values. It is safest to treat the ``_PyInterpreterFrame`` struct as opaque. .. .. date: 2022-08-22-21-33-28 .. gh-issue: 96187 .. nonce: W_6SRG .. section: Core and Builtins Fixed a bug that caused ``_PyCode_GetExtra`` to return garbage for negative indexes. Patch by Pablo Galindo .. .. date: 2022-08-20-18-36-40 .. gh-issue: 96143 .. nonce: nh3GFM .. section: Core and Builtins Add a new ``-X perf`` Python command line option as well as :func:`sys.activate_stack_trampoline` and :func:`sys.deactivate_stack_trampoline` function in the :mod:`sys` module that allows to set/unset the interpreter in a way that the Linux ``perf`` profiler can detect Python calls. The new :func:`sys.is_stack_trampoline_active` function allows to query the state of the perf trampoline. Design by Pablo Galindo. Patch by Pablo Galindo and Christian Heimes with contributions from Gregory P. Smith [Google] and Mark Shannon. .. .. date: 2022-08-19-06-51-17 .. gh-issue: 96071 .. nonce: mVgPAo .. section: Core and Builtins Fix a deadlock in :c:func:`PyGILState_Ensure` when allocating new thread state. Patch by Kumar Aditya. .. .. date: 2022-08-18-13-47-59 .. gh-issue: 96046 .. nonce: 5Hqbka .. section: Core and Builtins :c:func:`PyType_Ready` now initializes ``ht_cached_keys`` and performs additional checks to ensure that type objects are properly configured. This avoids crashes in 3rd party packages that don't use regular API to create new types. .. .. date: 2022-08-15-21-08-11 .. gh-issue: 96005 .. nonce: 6eoc8k .. section: Core and Builtins On WASI :const:`~errno.ENOTCAPABLE` is now mapped to :exc:`PermissionError`. The :mod:`errno` modules exposes the new error number. ``getpath.py`` now ignores :exc:`PermissionError` when it cannot open landmark files ``pybuilddir.txt`` and ``pyenv.cfg``. .. .. date: 2022-08-15-20-52-41 .. gh-issue: 93678 .. nonce: X7GuIJ .. section: Core and Builtins Added test a harness for direct unit tests of the compiler's optimization stage. The ``_testinternalcapi.optimize_cfg()`` function runs the optimiser on a sequence of instructions. The ``CfgOptimizationTestCase`` class in ``test.support`` has utilities for invoking the optimizer and checking the output. .. .. date: 2022-08-15-12-41-14 .. gh-issue: 95245 .. nonce: N4gOUV .. section: Core and Builtins Reduces the size of a "simple" Python object from 8 to 6 words by moving the weakreflist pointer into the pre-header directly before the object's dict/values pointer. .. .. date: 2022-08-15-11-58-05 .. gh-issue: 90997 .. nonce: bWwV8Q .. section: Core and Builtins Compile virtual :keyword:`try`/:keyword:`except` blocks to handle exceptions raised during :meth:`~generator.close` or :meth:`~generator.throw` calls through a suspended frame. .. .. date: 2022-08-14-10-04-44 .. gh-issue: 95977 .. nonce: gCTZb9 .. section: Core and Builtins Optimized calling :meth:`~object.__get__` with vectorcall. Patch by Kumar Aditya. .. .. date: 2022-08-12-18-13-49 .. gh-issue: 91210 .. nonce: AWMSLj .. section: Core and Builtins Improve error message when a parameter without a default value follows one with a default value, and show the same message, even when the non-default/default sequence is preceded by positional-only parameters. .. .. date: 2022-08-12-13-04-25 .. gh-issue: 95922 .. nonce: YNCtyX .. section: Core and Builtins Fixed bug where the compiler's ``eliminate_empty_basic_blocks`` function ignores the last block of the code unit. .. .. date: 2022-08-11-11-01-56 .. gh-issue: 95818 .. nonce: iClLdl .. section: Core and Builtins Skip over incomplete frames in :c:func:`PyThreadState_GetFrame`. .. .. date: 2022-08-11-09-19-55 .. gh-issue: 95876 .. nonce: YpQfoV .. section: Core and Builtins Fix format string in ``_PyPegen_raise_error_known_location`` that can lead to memory corruption on some 64bit systems. The function was building a tuple with ``i`` (int) instead of ``n`` (Py_ssize_t) for Py_ssize_t arguments. .. .. date: 2022-08-04-18-46-54 .. gh-issue: 95605 .. nonce: FbpCoG .. section: Core and Builtins Fix misleading contents of error message when converting an all-whitespace string to :class:`float`. .. .. date: 2022-07-31-13-23-12 .. gh-issue: 95150 .. nonce: 67FXVo .. section: Core and Builtins Update code object hashing and equality to consider all debugging and exception handling tables. This fixes an issue where certain non-identical code objects could be "deduplicated" during compilation. .. .. date: 2022-07-31-03-22-58 .. gh-issue: 91146 .. nonce: Y2Hziy .. section: Core and Builtins Reduce allocation size of :class:`list` from :meth:`str.split` and :meth:`str.rsplit`. Patch by Dong-hee Na and Inada Naoki. .. .. date: 2022-07-28-19-07-06 .. gh-issue: 87092 .. nonce: 73IPS1 .. section: Core and Builtins Create a 'jump target label' abstraction in the compiler so that the compiler's codegen stage does not work directly with basic blocks. This prepares the code for changes to the underlying CFG generation mechanism. .. .. date: 2022-07-28-08-33-31 .. gh-issue: 95355 .. nonce: yN4XVk .. section: Core and Builtins ``_PyPegen_Parser_New`` now properly detects token memory allocation errors. Patch by Honglin Zhu. .. .. date: 2022-07-27-14-21-57 .. gh-issue: 90081 .. nonce: HVAS5x .. section: Core and Builtins Run Python code in tracer/profiler function at full speed. Fixes slowdown in earlier versions of 3.11. .. .. date: 2022-07-27-14-05-07 .. gh-issue: 95324 .. nonce: 28Q5u7 .. section: Core and Builtins Emit a warning in debug mode if an object does not call :c:func:`PyObject_GC_UnTrack` before deallocation. Patch by Pablo Galindo. .. .. date: 2022-07-26-12-59-03 .. gh-issue: 95245 .. nonce: GHWczn .. section: Core and Builtins Merge managed dict and values pointer into a single tagged pointer to save one word in the pre-header. .. .. date: 2022-07-26-09-31-12 .. gh-issue: 93678 .. nonce: W8vvgT .. section: Core and Builtins Add cfg_builder struct and refactor the relevant code so that a cfg can be constructed without an instance of the compiler struct. .. .. date: 2022-07-24-00-27-47 .. gh-issue: 95185 .. nonce: ghYTZx .. section: Core and Builtins Prevented crashes in the AST constructor when compiling some absurdly long expressions like ``"+0"*1000000``. :exc:`RecursionError` is now raised instead. Patch by Pablo Galindo .. .. date: 2022-07-23-19-16-25 .. gh-issue: 93351 .. nonce: 0Jyvu- .. section: Core and Builtins :class:`ast.AST` node positions are now validated when provided to :func:`compile` and other related functions. If invalid positions are detected, a :exc:`ValueError` will be raised. .. .. date: 2022-07-22-12-53-34 .. gh-issue: 94438 .. nonce: hNqACc .. section: Core and Builtins Fix an issue that caused extended opcode arguments and some conditional pops to be ignored when calculating valid jump targets for assignments to the ``f_lineno`` attribute of frame objects. In some cases, this could cause inconsistent internal state, resulting in a hard crash of the interpreter. .. .. date: 2022-07-21-19-19-20 .. gh-issue: 95060 .. nonce: 4xdT1f .. section: Core and Builtins Undocumented ``PyCode_Addr2Location`` function now properly returns when ``addrq`` argument is less than zero. .. .. date: 2022-07-21-17-54-52 .. gh-issue: 95113 .. nonce: NnSLpT .. section: Core and Builtins Replace all ``EXTENDED_ARG_QUICK`` instructions with basic :opcode:`EXTENDED_ARG` instructions in unquickened code. Consumers of non-adaptive bytecode should be able to handle extended arguments the same way they were handled in CPython 3.10 and older. .. .. date: 2022-07-20-13-46-01 .. gh-issue: 91409 .. nonce: dhL8Zo .. section: Core and Builtins Fix incorrect source location info caused by certain optimizations in the bytecode compiler. .. .. date: 2022-07-20-09-04-55 .. gh-issue: 95023 .. nonce: bs-xd7 .. section: Core and Builtins Implement :func:`os.setns` and :func:`os.unshare` for Linux. Patch by Noam Cohen. .. .. date: 2022-07-19-16-30-59 .. gh-issue: 94036 .. nonce: _6Utkm .. section: Core and Builtins Fix incorrect source location info for some multi-line attribute accesses and method calls. .. .. date: 2022-07-19-09-41-55 .. gh-issue: 94938 .. nonce: xYBlM7 .. section: Core and Builtins Fix error detection in some builtin functions when keyword argument name is an instance of a str subclass with overloaded ``__eq__`` and ``__hash__``. Previously it could cause SystemError or other undesired behavior. .. .. date: 2022-07-19-04-34-56 .. gh-issue: 94996 .. nonce: dV564A .. section: Core and Builtins :func:`ast.parse` will no longer parse function definitions with positional-only params when passed ``feature_version`` less than ``(3, 8)``. Patch by Shantanu Jain. .. .. date: 2022-07-18-14-19-21 .. gh-issue: 94739 .. nonce: NQJQi7 .. section: Core and Builtins Allow jumping within, out of, and across exception handlers in the debugger. .. .. date: 2022-07-18-05-10-29 .. gh-issue: 94949 .. nonce: OsZ7_s .. section: Core and Builtins :func:`ast.parse` will no longer parse parenthesized context managers when passed ``feature_version`` less than ``(3, 9)``. Patch by Shantanu Jain. .. .. date: 2022-07-18-04-48-34 .. gh-issue: 94947 .. nonce: df9gUw .. section: Core and Builtins :func:`ast.parse` will no longer parse assignment expressions when passed ``feature_version`` less than ``(3, 8)``. Patch by Shantanu Jain. .. .. date: 2022-07-17-15-54-29 .. gh-issue: 91256 .. nonce: z7i7Q5 .. section: Core and Builtins Ensures the program name is known for help text during interpreter startup. .. .. date: 2022-07-16-08-14-17 .. gh-issue: 94869 .. nonce: eRwMsX .. section: Core and Builtins Fix the column offsets for some expressions in multi-line f-strings :mod:`ast` nodes. Patch by Pablo Galindo. .. .. date: 2022-07-15-22-47-44 .. gh-issue: 94893 .. nonce: YiJYcW .. section: Core and Builtins Fix an issue where frame object manipulations could corrupt inline bytecode caches. .. .. date: 2022-07-15-22-16-08 .. gh-issue: 94822 .. nonce: zRRzBN .. section: Core and Builtins Fix an issue where lookups of metaclass descriptors may be ignored when an identically-named attribute also exists on the class itself. .. .. date: 2022-07-15-16-15-04 .. gh-issue: 91153 .. nonce: HiBmtt .. section: Core and Builtins Fix an issue where a :class:`bytearray` item assignment could crash if it's resized by the new value's :meth:`__index__` method. .. .. date: 2022-07-14-10-07-53 .. gh-issue: 90699 .. nonce: x3aG9m .. section: Core and Builtins Fix reference counting bug in :meth:`bool.__repr__`. Patch by Kumar Aditya. .. .. date: 2022-07-08-16-44-11 .. gh-issue: 94694 .. nonce: VkL2CM .. section: Core and Builtins Fix an issue that could cause code with multi-line method lookups to have misleading or incorrect column offset information. In some cases (when compiling a hand-built AST) this could have resulted in a hard crash of the interpreter. .. .. date: 2022-07-08-11-44-45 .. gh-issue: 93252 .. nonce: i2358c .. section: Core and Builtins Fix an issue that caused internal frames to outlive failed Python function calls, possibly resulting in memory leaks or hard interpreter crashes. .. .. date: 2022-07-07-21-13-25 .. gh-issue: 94215 .. nonce: _Sv9Ms .. section: Core and Builtins Fix an issue where exceptions raised by line-tracing events would cause frames to be left in an invalid state, possibly resulting in a hard crash of the interpreter. .. .. date: 2022-07-06-14-02-26 .. gh-issue: 92228 .. nonce: 44Cbly .. section: Core and Builtins Disable the compiler's inline-small-exit-blocks optimization for exit blocks that are associated with source code lines. This fixes a bug where the debugger cannot tell where an exception handler ends and the following code block begins. .. .. date: 2022-07-01-20-00-19 .. gh-issue: 94485 .. nonce: mo5st7 .. section: Core and Builtins Line number of a module's ``RESUME`` instruction is set to 0 as specified in :pep:`626`. .. .. date: 2022-06-30-15-07-26 .. gh-issue: 94438 .. nonce: btzHSk .. section: Core and Builtins Account for instructions that can push NULL to the stack when setting line number in a frame. Prevents some (unlikely) crashes. .. .. date: 2022-06-29-22-18-36 .. gh-issue: 91719 .. nonce: 3APYYI .. section: Core and Builtins Reload ``opcode`` when raising ``unknown opcode error`` in the interpreter main loop, for C compilers to generate dispatching code independently. .. .. date: 2022-06-29-15-45-04 .. gh-issue: 94329 .. nonce: olUQyk .. section: Core and Builtins Compile and run code with unpacking of extremely large sequences (1000s of elements). Such code failed to compile. It now compiles and runs correctly. .. .. date: 2022-06-28-14-20-36 .. gh-issue: 94360 .. nonce: DiEnen .. section: Core and Builtins Fixed a tokenizer crash when reading encoded files with syntax errors from ``stdin`` with non utf-8 encoded text. Patch by Pablo Galindo .. .. date: 2022-06-28-12-41-17 .. gh-issue: 88116 .. nonce: A7fEl_ .. section: Core and Builtins Fix an issue when reading line numbers from code objects if the encoded line numbers are close to ``INT_MIN``. Patch by Pablo Galindo .. .. date: 2022-06-28-10-08-06 .. gh-issue: 94262 .. nonce: m-HWUZ .. section: Core and Builtins Don't create frame objects for incomplete frames. Prevents the creation of generators and closures from being observable to Python and C extensions, restoring the behavior of 3.10 and earlier. .. .. date: 2022-06-26-14-37-03 .. gh-issue: 94192 .. nonce: ab7tn7 .. section: Core and Builtins Fix error for dictionary literals with invalid expression as value. .. .. date: 2022-06-25-10-19-43 .. gh-issue: 87995 .. nonce: aMDHnp .. section: Core and Builtins :class:`types.MappingProxyType` instances are now hashable if the underlying mapping is hashable. .. .. date: 2022-06-24-14-06-20 .. gh-issue: 93883 .. nonce: 8jVQQ4 .. section: Core and Builtins Revise the display strategy of traceback enhanced error locations. The indicators are only shown when the location doesn't span the whole line. .. .. date: 2022-06-23-12-10-39 .. gh-issue: 94163 .. nonce: SqAfQq .. section: Core and Builtins Add :opcode:`BINARY_SLICE` and :opcode:`STORE_SLICE` instructions for more efficient handling and better specialization of slicing operations, where the slice is explicit in the source code. .. .. date: 2022-06-20-13-48-57 .. gh-issue: 94021 .. nonce: o78q3G .. section: Core and Builtins Fix unreachable code warning in ``Python/specialize.c``. .. .. date: 2022-06-18-17-00-33 .. gh-issue: 93911 .. nonce: y286of .. section: Core and Builtins Specialize ``LOAD_ATTR`` for objects with custom ``__getattribute__``. .. .. date: 2022-06-17-16-30-24 .. gh-issue: 93955 .. nonce: LmiAe9 .. section: Core and Builtins Improve performance of attribute lookups on objects with custom ``__getattribute__`` and ``__getattr__``. Patch by Ken Jin. .. .. date: 2022-06-16-16-53-22 .. gh-issue: 93911 .. nonce: RDwIiK .. section: Core and Builtins Specialize ``LOAD_ATTR`` for ``property()`` attributes. .. .. date: 2022-06-15-16-45-53 .. gh-issue: 93678 .. nonce: 1I_ZT3 .. section: Core and Builtins Refactor compiler optimisation code so that it no longer needs the ``struct assembler`` and ``struct compiler`` passed around. Instead, each function takes the CFG and other data that it actually needs. This will make it possible to test this code directly. .. .. date: 2022-06-15-11-16-13 .. gh-issue: 93841 .. nonce: 06zqX3 .. section: Core and Builtins When built with ``-enable-pystats``, ``sys._stats_on()``, ``sys._stats_off()``, ``sys._stats_clear()`` and ``sys._stats_dump()`` functions have been added to enable gathering stats for parts of programs. .. .. date: 2022-06-13-13-55-34 .. gh-issue: 93516 .. nonce: HILrDl .. section: Core and Builtins Store offset of first traceable instruction in code object to avoid having to recompute it for each instruction when tracing. .. .. date: 2022-06-13-10-48-09 .. gh-issue: 93516 .. nonce: yJSait .. section: Core and Builtins Lazily create a table mapping bytecode offsets to line numbers to speed up calculation of line numbers when tracing. .. .. date: 2022-06-12-19-31-56 .. gh-issue: 89828 .. nonce: bq02M7 .. section: Core and Builtins :class:`types.GenericAlias` no longer relays the ``__class__`` attribute. For example, ``isinstance(list[int], type)`` no longer returns ``True``. .. .. date: 2022-06-10-16-57-35 .. gh-issue: 93678 .. nonce: 1WBnHt .. section: Core and Builtins Refactor the compiler to reduce boilerplate and repetition. .. .. date: 2022-06-10-12-03-17 .. gh-issue: 93671 .. nonce: idkQqG .. section: Core and Builtins Fix some exponential backtrace case happening with deeply nested sequence patterns in match statements. Patch by Pablo Galindo .. .. date: 2022-06-10-10-31-18 .. gh-issue: 93662 .. nonce: -7RSC1 .. section: Core and Builtins Make sure that the end column offsets are correct in multi-line method calls. Previously, the end column could precede the column offset. .. .. date: 2022-06-09-19-19-02 .. gh-issue: 93461 .. nonce: 5DqP1e .. section: Core and Builtins :func:`importlib.invalidate_caches` now drops entries from :data:`sys.path_importer_cache` with a relative path as name. This solves a caching issue when a process changes its current working directory. ``FileFinder`` no longer inserts a dot in the path, e.g. ``/egg/./spam`` is now ``/egg/spam``. .. .. date: 2022-06-09-09-08-29 .. gh-issue: 93621 .. nonce: -_Pn1d .. section: Core and Builtins Change order of bytecode instructions emitted for :keyword:`with` and :keyword:`async with` to reduce the number of entries in the exception table. .. .. date: 2022-06-06-14-28-24 .. gh-issue: 93533 .. nonce: lnC0CC .. section: Core and Builtins Reduce the size of the inline cache for ``LOAD_METHOD`` by 2 bytes. .. .. date: 2022-06-02-23-00-08 .. gh-issue: 93444 .. nonce: m63DIs .. section: Core and Builtins Removed redundant fields from the compiler's basicblock struct: ``b_nofallthrough``, ``b_exit``, ``b_return``. They can be easily calculated from the opcode of the last instruction of the block. .. .. date: 2022-06-02-08-28-55 .. gh-issue: 93429 .. nonce: DZTWHx .. section: Core and Builtins ``LOAD_METHOD`` instruction has been removed. It was merged back into ``LOAD_ATTR``. .. .. date: 2022-06-01-17-47-40 .. gh-issue: 93418 .. nonce: 24dJuc .. section: Core and Builtins Fixed an assert where an f-string has an equal sign '=' following an expression, but there's no trailing brace. For example, f"{i=". .. .. date: 2022-05-31-16-36-30 .. gh-issue: 93382 .. nonce: Jf6gAj .. section: Core and Builtins Cache the result of :c:func:`PyCode_GetCode` function to restore the O(1) lookup of the :attr:`~types.CodeType.co_code` attribute. .. .. date: 2022-05-30-19-00-38 .. gh-issue: 93359 .. nonce: zXV3A0 .. section: Core and Builtins Ensure that custom :mod:`ast` nodes without explicit end positions can be compiled. Patch by Pablo Galindo. .. .. date: 2022-05-30-15-51-11 .. gh-issue: 93356 .. nonce: l5wnzW .. section: Core and Builtins Code for exception handlers is emitted at the end of the code unit's bytecode. This avoids one jump when no exception is raised. .. .. date: 2022-05-30-15-35-42 .. gh-issue: 93354 .. nonce: RZk8gs .. section: Core and Builtins Use exponential backoff for specialization counters in the interpreter. Can reduce the number of failed specializations significantly and avoid slowdown for those parts of a program that are not suitable for specialization. .. .. date: 2022-05-30-14-50-03 .. gh-issue: 93283 .. nonce: XDO2ZQ .. section: Core and Builtins Improve error message for invalid syntax of conversion character in f-string expressions. .. .. date: 2022-05-30-10-22-46 .. gh-issue: 93345 .. nonce: gi1A4L .. section: Core and Builtins Fix a crash in substitution of a ``TypeVar`` in nested generic alias after ``TypeVarTuple``. .. .. date: 2022-05-25-21-56-25 .. gh-issue: 93223 .. nonce: gTOGVZ .. section: Core and Builtins When a bytecode instruction jumps to an unconditional jump instruction, the first instruction can often be optimized to target the unconditional jump's target directly. For tracing reasons, this would previously only occur if both instructions have the same line number. This also now occurs if the unconditional jump is artificial, i.e., if it has no associated line number. .. .. date: 2022-05-25-12-30-12 .. gh-issue: 84694 .. nonce: 5sjy2w .. section: Core and Builtins The ``--experimental-isolated-subinterpreters`` configure option and ``EXPERIMENTAL_ISOLATED_SUBINTERPRETERS`` macro have been removed. .. .. date: 2022-05-25-04-07-22 .. gh-issue: 91924 .. nonce: -UyO4q .. section: Core and Builtins Fix ``__lltrace__`` debug feature if the stdout encoding is not UTF-8. Patch by Victor Stinner. .. .. date: 2022-05-24-14-35-48 .. gh-issue: 93040 .. nonce: 9X6Ofu .. section: Core and Builtins Wraps unused parameters in ``Objects/obmalloc.c`` with ``Py_UNUSED``. .. .. date: 2022-05-23-18-36-07 .. gh-issue: 93143 .. nonce: X1Yqxm .. section: Core and Builtins Avoid ``NULL`` checks for uninitialized local variables by determining at compile time which variables must be initialized. .. .. date: 2022-05-22-02-37-50 .. gh-issue: 93061 .. nonce: r70Imp .. section: Core and Builtins Backward jumps after ``async for`` loops are no longer given dubious line numbers. .. .. date: 2022-05-21-23-21-37 .. gh-issue: 93065 .. nonce: 5I18WC .. section: Core and Builtins Fix contextvars HAMT implementation to handle iteration over deep trees. The bug was discovered and fixed by Eli Libman. See `MagicStack/immutables#84 `_ for more details. .. .. date: 2022-05-20-13-32-24 .. gh-issue: 93012 .. nonce: e9B-pv .. section: Core and Builtins Added the new function :c:func:`PyType_FromMetaclass`, which generalizes the existing :c:func:`PyType_FromModuleAndSpec` using an additional metaclass argument. This is useful for language binding tools, where it can be used to intercept type-related operations like subclassing or static attribute access by specifying a metaclass with custom slots. Importantly, :c:func:`PyType_FromMetaclass` is available in the Limited API, which provides a path towards migrating more binding tools onto the Stable ABI. .. .. date: 2022-05-20-09-25-34 .. gh-issue: 93021 .. nonce: k3Aji2 .. section: Core and Builtins Fix the :attr:`__text_signature__` for :meth:`__get__` methods implemented in C. Patch by Jelle Zijlstra. .. .. date: 2022-05-19-15-29-53 .. gh-issue: 89914 .. nonce: 8bAffH .. section: Core and Builtins The operand of the ``YIELD_VALUE`` instruction is set to the stack depth. This is done to help frame handling on ``yield`` and may assist debuggers. .. .. date: 2022-05-19-13-25-50 .. gh-issue: 92955 .. nonce: kmNV33 .. section: Core and Builtins Fix memory leak in code object's lines and positions iterators as they were not finalized at exit. Patch by Kumar Aditya. .. .. date: 2022-05-18-18-34-45 .. gh-issue: 92930 .. nonce: kpYPOb .. section: Core and Builtins Fixed a crash in ``_pickle.c`` from mutating collections during ``__reduce__`` or ``persistent_id``. .. .. date: 2022-05-18-12-55-35 .. gh-issue: 90690 .. nonce: TKuoTa .. section: Core and Builtins The PRECALL instruction has been removed. It offered only a small advantage for specialization and is not needed in the vast majority of cases. .. .. date: 2022-05-18-08-32-33 .. gh-issue: 92914 .. nonce: tJUeTD .. section: Core and Builtins Always round the allocated size for lists up to the nearest even number. .. .. date: 2022-05-17-20-41-43 .. gh-issue: 92858 .. nonce: eIXJTn .. section: Core and Builtins Improve error message for some suites with syntax error before ':' .. .. date: 2022-05-15-15-25-05 .. gh-issue: 90473 .. nonce: MoPHYW .. section: Core and Builtins Decrease default recursion limit on WASI to address limited call stack size. .. .. date: 2022-05-14-13-22-11 .. gh-issue: 92804 .. nonce: rAqpI2 .. section: Core and Builtins Fix memory leak in ``memoryview`` iterator as it was not finalized at exit. Patch by Kumar Aditya. .. .. date: 2022-05-13-12-36-10 .. gh-issue: 92777 .. nonce: Odo4vP .. section: Core and Builtins Specialize ``LOAD_METHOD`` for objects with lazy dictionaries. Patch by Ken Jin. .. .. date: 2022-05-13-00-57-18 .. gh-issue: 92658 .. nonce: YdhFE2 .. section: Core and Builtins Add support for connecting and binding to Hyper-V sockets on Windows Hyper-V hosts and guests. .. .. date: 2022-05-12-13-23-19 .. gh-issue: 92236 .. nonce: sDRzUe .. section: Core and Builtins Remove spurious "LINE" event when starting a generator or coroutine, visible tracing functions implemented in C. .. .. date: 2022-05-11-09-16-54 .. gh-issue: 91102 .. nonce: lenv9h .. section: Core and Builtins :meth:`_warnings.warn_explicit` is ported to Argument Clinic. .. .. date: 2022-05-10-11-34-35 .. gh-issue: 92619 .. nonce: u0V0lY .. section: Core and Builtins Make the compiler duplicate an exit block only if none of its instructions have a lineno (previously only the first instruction in the block was checked, leading to unnecessarily duplicated blocks). .. .. date: 2022-05-08-19-43-31 .. gh-issue: 88750 .. nonce: 1BjJg- .. section: Core and Builtins The deprecated debug build only ``PYTHONTHREADDEBUG`` environment variable no longer does anything. .. .. date: 2022-05-03-20-12-18 .. gh-issue: 92261 .. nonce: aigLnb .. section: Core and Builtins Fix hang when trying to iterate over a ``typing.Union``. .. .. date: 2022-04-24-02-22-10 .. gh-issue: 91432 .. nonce: YPJAK6 .. section: Core and Builtins Specialized the :opcode:`FOR_ITER` opcode using the PEP 659 machinery .. .. date: 2022-04-16-15-37-55 .. gh-issue: 91399 .. nonce: trLbK6 .. section: Core and Builtins Removed duplicate '{0, 0, 0, 0, 0, 0}' entry in 'Objects/unicodetype_db.h'. .. .. date: 2022-04-15-22-12-53 .. gh-issue: 91578 .. nonce: rDOtyK .. section: Core and Builtins Updates the error message for abstract class. .. .. bpo: 47091 .. date: 2022-03-22-13-12-27 .. nonce: tJcy-P .. section: Core and Builtins Improve performance of repetition of :class:`list` and :class:`tuple` by using ``memcpy`` to copy data and performing the reference increments in one step. .. .. bpo: 46142 .. date: 2022-01-02-14-53-59 .. nonce: WayjgT .. section: Core and Builtins Make ``--help`` output shorter by moving some info to the new ``--help-env`` and ``--help-xoptions`` command-line options. Also add ``--help-all`` option to print complete usage. .. .. bpo: 42316 .. date: 2020-11-15-02-08-43 .. nonce: LqdkWK .. section: Core and Builtins Document some places where an assignment expression needs parentheses. .. .. date: 2022-10-23-18-30-39 .. gh-issue: 89237 .. nonce: kBui30 .. section: Library Fix hang on Windows in ``subprocess.wait_closed()`` in :mod:`asyncio` with :class:`~asyncio.ProactorEventLoop`. Patch by Kumar Aditya. .. .. date: 2022-10-19-09-29-12 .. gh-issue: 97928 .. nonce: xj3im7 .. section: Library :meth:`tkinter.Text.count` raises now an exception for options starting with "-" instead of silently ignoring them. .. .. date: 2022-10-18-15-41-37 .. gh-issue: 98393 .. nonce: vhPu4L .. section: Library The :mod:`os` module no longer accepts bytes-like paths, like :class:`bytearray` and :class:`memoryview` types: only the exact :class:`bytes` type is accepted for bytes strings. Patch by Victor Stinner. .. .. date: 2022-10-17-12-49-02 .. gh-issue: 98363 .. nonce: aFmSP- .. section: Library Added itertools.batched() to batch data into lists of a given length with the last list possibly being shorter than the others. .. .. date: 2022-10-16-15-31-50 .. gh-issue: 98331 .. nonce: Y5kPOX .. section: Library Update the bundled copies of pip and setuptools to versions 22.3 and 65.5.0 respectively. .. .. date: 2022-10-16-06-18-59 .. gh-issue: 98307 .. nonce: b2_CDu .. section: Library A :meth:`~logging.handlers.SysLogHandler.createSocket` method was added to :class:`~logging.handlers.SysLogHandler`. .. .. date: 2022-10-14-19-57-37 .. gh-issue: 96035 .. nonce: 0xcX-p .. section: Library Fix bug in :func:`urllib.parse.urlparse` that causes certain port numbers containing whitespace, underscores, plus and minus signs, or non-ASCII digits to be incorrectly accepted. .. .. date: 2022-10-14-12-29-05 .. gh-issue: 98257 .. nonce: aMSMs2 .. section: Library Make :func:`sys.setprofile` and :func:`sys.settrace` functions reentrant. They can no long fail with: ``RuntimeError("Cannot install a trace function while another trace function is being installed")``. Patch by Victor Stinner. .. .. date: 2022-10-14-11-46-31 .. gh-issue: 98251 .. nonce: Uxc9al .. section: Library Allow :mod:`venv` to pass along :envvar:`PYTHON*` variables to ``ensurepip`` and ``pip`` when they do not impact path resolution .. .. date: 2022-10-12-11-20-54 .. gh-issue: 94597 .. nonce: GYJZlb .. section: Library Deprecated :meth:`asyncio.AbstractEventLoopPolicy.get_child_watcher` and :meth:`asyncio.AbstractEventLoopPolicy.set_child_watcher` methods to be removed in Python 3.14. Patch by Kumar Aditya. .. .. date: 2022-10-12-10-00-40 .. gh-issue: 98178 .. nonce: hspH51 .. section: Library On macOS, fix a crash in :func:`syslog.syslog` in multi-threaded applications. On macOS, the libc ``syslog()`` function is not thread-safe, so :func:`syslog.syslog` no longer releases the GIL to call it. Patch by Victor Stinner. .. .. date: 2022-10-10-09-52-21 .. gh-issue: 44098 .. nonce: okcqJt .. section: Library Release the GIL when creating :class:`mmap.mmap` objects on Unix. .. .. date: 2022-10-09-12-12-38 .. gh-issue: 87730 .. nonce: ClgP3f .. section: Library Wrap network errors consistently in urllib FTP support, so the test suite doesn't fail when a network is available but the public internet is not reachable. .. .. date: 2022-10-08-06-59-46 .. gh-issue: 94597 .. nonce: TsS0oT .. section: Library The child watcher classes :class:`~asyncio.MultiLoopChildWatcher`, :class:`~asyncio.FastChildWatcher` and :class:`~asyncio.SafeChildWatcher` are deprecated and will be removed in Python 3.14. Patch by Kumar Aditya. .. .. date: 2022-10-07-09-52-37 .. gh-issue: 98023 .. nonce: aliEcl .. section: Library Change default child watcher to :class:`~asyncio.PidfdChildWatcher` on Linux systems which supports it. Patch by Kumar Aditya. .. .. date: 2022-10-06-23-42-00 .. gh-issue: 90985 .. nonce: s280JY .. section: Library Earlier in 3.11 we deprecated ``asyncio.Task.cancel("message")``. We realized we were too harsh, and have undeprecated it. .. .. date: 2022-10-06-17-59-22 .. gh-issue: 65961 .. nonce: SXlQnI .. section: Library Do not rely solely on ``__cached__`` on modules; code will also support ``__spec__.cached``. .. .. date: 2022-10-05-20-52-17 .. gh-issue: 97646 .. nonce: Q4fVww .. section: Library Replace deprecated ``application/javascript`` with ``text/javascript`` in :mod:`mimetypes`. See :rfc:`9239`. Patch by Noam Cohen. .. .. date: 2022-10-05-16-10-24 .. gh-issue: 97930 .. nonce: NPSrzE .. section: Library Apply changes from importlib_resources 5.8 and 5.9: ``Traversable.joinpath`` provides a concrete implementation. ``as_file`` now supports directories of resources. .. .. date: 2022-10-05-11-40-02 .. gh-issue: 97850 .. nonce: NzdREm .. section: Library Remove deprecated :func:`!importlib.util.set_loader` and :func:`!importlib.util.module_for_loader` from :mod:`importlib.util`. .. .. date: 2022-10-04-21-21-41 .. gh-issue: 97837 .. nonce: 19q-eg .. section: Library Change deprecate warning message in :mod:`unittest` from ``It is deprecated to return a value!=None`` to ``It is deprecated to return a value that is not None from a test case`` .. .. date: 2022-10-04-07-55-19 .. gh-issue: 97825 .. nonce: mNdv1l .. section: Library Fixes :exc:`AttributeError` when :meth:`subprocess.check_output` is used with argument ``input=None`` and either of the arguments *encoding* or *errors* are used. .. .. date: 2022-10-04-00-43-43 .. gh-issue: 97008 .. nonce: 3rjtt6 .. section: Library :exc:`NameError` and :exc:`AttributeError` spelling suggestions provided since :gh:`82711` are now also emitted by the pure Python :mod:`traceback` module. Tests for those suggestions now exercise both implementations to ensure they are equivalent. Patch by Carl Friedrich Bolz-Tereick and Łukasz Langa. .. .. date: 2022-10-03-14-42-13 .. gh-issue: 97799 .. nonce: Y1iJvf .. section: Library :mod:`dataclass` now uses :func:`inspect.get_annotations` to examine the annotations on class objects. .. .. date: 2022-10-03-13-25-19 .. gh-issue: 97781 .. nonce: gCLLef .. section: Library Removed deprecated interfaces in ``importlib.metadata`` (entry points accessed as dictionary, implicit dictionary construction of sequence of ``EntryPoint`` objects, mutablility of ``EntryPoints`` result, access of entry point by index). ``entry_points`` now has a simpler, more straightforward API (returning ``EntryPoints``). .. .. date: 2022-09-30-15-56-20 .. gh-issue: 96827 .. nonce: lzy1iw .. section: Library Avoid spurious tracebacks from :mod:`asyncio` when default executor cleanup is delayed until after the event loop is closed (e.g. as the result of a keyboard interrupt). .. .. date: 2022-09-30-09-22-37 .. gh-issue: 95534 .. nonce: ndEfPj .. section: Library :meth:`gzip.GzipFile.read` reads 10% faster. .. .. date: 2022-09-29-23-22-24 .. gh-issue: 97592 .. nonce: tpJg_J .. section: Library Avoid a crash in the C version of :meth:`asyncio.Future.remove_done_callback` when an evil argument is passed. .. .. date: 2022-09-29-08-15-55 .. gh-issue: 97639 .. nonce: JSjWYW .. section: Library Remove ``tokenize.NL`` check from :mod:`tabnanny`. .. .. date: 2022-09-25-23-24-52 .. gh-issue: 97545 .. nonce: HZLSNt .. section: Library Make Semaphore run faster. .. .. date: 2022-09-25-20-42-33 .. gh-issue: 73588 .. nonce: uVtjEA .. section: Library Fix generation of the default name of :class:`tkinter.Checkbutton`. Previously, checkbuttons in different parent widgets could have the same short name and share the same state if arguments "name" and "variable" are not specified. Now they are globally unique. .. .. date: 2022-09-24-18-56-23 .. gh-issue: 96865 .. nonce: o9WUkW .. section: Library fix Flag to use boundary CONFORM This restores previous Flag behavior of allowing flags with non-sequential values to be combined; e.g. class Skip(Flag): TWO = 2 EIGHT = 8 Skip.TWO | Skip.EIGHT -> .. .. date: 2022-09-22-14-35-02 .. gh-issue: 97005 .. nonce: yf21Q7 .. section: Library Update bundled libexpat to 2.4.9 .. .. date: 2022-09-22-11-50-29 .. gh-issue: 85760 .. nonce: DETTPd .. section: Library Fix race condition in :mod:`asyncio` where :meth:`~asyncio.SubprocessProtocol.process_exited` called before the :meth:`~asyncio.SubprocessProtocol.pipe_data_received` leading to inconsistent output. Patch by Kumar Aditya. .. .. date: 2022-09-18-04-51-30 .. gh-issue: 96704 .. nonce: DmamRX .. section: Library Pass the correct ``contextvars.Context`` when a ``asyncio`` exception handler is called on behalf of a task or callback handle. This adds a new ``Task`` method, ``get_context``, and also a new ``Handle`` method with the same name. If this method is not found on a task object (perhaps because it is a third-party library that does not yet provide this method), the context prevailing at the time the exception handler is called is used. .. .. date: 2022-09-17-13-15-10 .. gh-issue: 96819 .. nonce: 6RfqM7 .. section: Library Fixed check in :mod:`multiprocessing.resource_tracker` that guarantees that the length of a write to a pipe is not greater than ``PIPE_BUF``. .. .. date: 2022-09-16-07-53-29 .. gh-issue: 95865 .. nonce: oHjX0A .. section: Library Reduce :func:`urllib.parse.quote_from_bytes` memory use on large values. Contributed by Dennis Sweeney. .. .. date: 2022-09-15-00-37-33 .. gh-issue: 96741 .. nonce: 4b6czN .. section: Library Corrected type annotation for dataclass attribute ``pstats.FunctionProfile.ncalls`` to be ``str``. .. .. date: 2022-09-13-15-12-31 .. gh-issue: 96734 .. nonce: G08vjz .. section: Library Update :mod:`unicodedata` database to Unicode 15.0.0. .. .. date: 2022-09-10-16-46-16 .. gh-issue: 96735 .. nonce: 0YzJuG .. section: Library Fix undefined behaviour in :func:`struct.unpack`. .. .. date: 2022-09-08-20-12-48 .. gh-issue: 46412 .. nonce: r_cfTh .. section: Library Improve performance of ``bool(db)`` for large ndb/gdb databases. Previously this would call ``len(db)`` which would iterate over all keys -- the answer (empty or not) is known after the first key. .. .. date: 2022-09-07-22-49-37 .. gh-issue: 96652 .. nonce: YqOKxI .. section: Library Fix the faulthandler implementation of ``faulthandler.register(signal, chain=True)`` if the ``sigaction()`` function is not available: don't call the previous signal handler if it's NULL. Patch by Victor Stinner. .. .. date: 2022-09-04-12-32-52 .. gh-issue: 68163 .. nonce: h6TJCc .. section: Library Correct conversion of :class:`numbers.Rational`'s to :class:`float`. .. .. date: 2022-09-03-18-39-05 .. gh-issue: 96538 .. nonce: W156-D .. section: Library Speed up ``bisect.bisect()`` functions by taking advantage of type-stability. .. .. date: 2022-09-01-13-54-38 .. gh-issue: 96465 .. nonce: 0IJmrH .. section: Library Fraction hashes are now cached. .. .. date: 2022-08-31-11-10-21 .. gh-issue: 96079 .. nonce: uqrXdJ .. section: Library In :mod:`typing`, fix missing field ``name`` and incorrect ``__module__`` in _AnnotatedAlias. .. .. date: 2022-08-30-12-32-00 .. gh-issue: 96415 .. nonce: 6W7ORH .. section: Library Remove ``types._cell_factory`` from module namespace. .. .. date: 2022-08-30-11-46-36 .. gh-issue: 95987 .. nonce: CV7_u4 .. section: Library Fix ``repr`` of ``Any`` subclasses. .. .. date: 2022-08-29-16-54-36 .. gh-issue: 96388 .. nonce: dCpJcu .. section: Library Work around missing socket functions in :class:`~socket.socket`'s ``__repr__``. .. .. date: 2022-08-29-15-28-39 .. gh-issue: 96385 .. nonce: uLRTsf .. section: Library Fix ``TypeVarTuple.__typing_prepare_subst__``. ``TypeError`` was not raised when using more than one ``TypeVarTuple``, like ``[*T, *V]`` in type alias substitutions. .. .. date: 2022-08-29-12-49-30 .. gh-issue: 96142 .. nonce: PdCMez .. section: Library Add ``match_args``, ``kw_only``, ``slots``, and ``weakref_slot`` to ``_DataclassParams``. .. .. date: 2022-08-29-12-35-28 .. gh-issue: 96073 .. nonce: WaGstf .. section: Library In :mod:`inspect`, fix overeager replacement of "``typing.``" in formatting annotations. .. .. date: 2022-08-29-07-04-03 .. gh-issue: 89258 .. nonce: ri7ncj .. section: Library Added a :meth:`~logging.Logger.getChildren` method to :class:`logging.Logger`, to get the immediate child loggers of a logger. .. .. date: 2022-08-27-23-16-09 .. gh-issue: 96346 .. nonce: jJX14I .. section: Library Use double caching for compiled RE patterns. .. .. date: 2022-08-27-21-26-52 .. gh-issue: 96349 .. nonce: XyYLlO .. section: Library Fixed a minor performance regression in :func:`threading.Event.__init__` .. .. date: 2022-08-27-14-38-49 .. gh-issue: 90467 .. nonce: VOOB0p .. section: Library Fix :class:`asyncio.streams.StreamReaderProtocol` to keep a strong reference to the created task, so that it's not garbage collected .. .. date: 2022-08-23-13-30-30 .. gh-issue: 96172 .. nonce: 7WTHer .. section: Library Fix a bug in ``unicodedata``: ``east_asian_width`` used to return the wrong value for unassigned characters; and for yet unassigned, but reserved characters. .. .. date: 2022-08-22-18-42-17 .. gh-issue: 96159 .. nonce: 3bFU39 .. section: Library Fix a performance regression in logging TimedRotatingFileHandler. Only check for special files when the rollover time has passed. .. .. date: 2022-08-22-13-54-20 .. gh-issue: 96175 .. nonce: bH7zGU .. section: Library Fix unused ``localName`` parameter in the ``Attr`` class in :mod:`xml.dom.minidom`. .. .. date: 2022-08-20-12-56-15 .. gh-issue: 96145 .. nonce: 8ah3pE .. section: Library Add AttrDict to JSON module for use with object_hook. .. .. date: 2022-08-20-10-31-01 .. gh-issue: 96052 .. nonce: a6FhaD .. section: Library Fix handling compiler warnings (SyntaxWarning and DeprecationWarning) in :func:`codeop.compile_command` when checking for incomplete input. Previously it emitted warnings and raised a SyntaxError. Now it always returns ``None`` for incomplete input without emitting any warnings. .. .. date: 2022-08-19-18-21-01 .. gh-issue: 96125 .. nonce: ODcF1Y .. section: Library Fix incorrect condition that causes ``sys.thread_info.name`` to be wrong on pthread platforms. .. .. date: 2022-08-19-10-19-32 .. gh-issue: 96019 .. nonce: b7uAVP .. section: Library Fix a bug in the ``makeunicodedata.py`` script leading to about 13 KiB of space saving in the ``unicodedata`` module, specifically the character decomposition data. .. .. date: 2022-08-18-14-53-53 .. gh-issue: 95463 .. nonce: GpP05c .. section: Library Remove an incompatible change from :issue:`28080` that caused a regression that ignored the utf8 in ``ZipInfo.flag_bits``. Patch by Pablo Galindo. .. .. date: 2022-08-14-18-59-54 .. gh-issue: 69142 .. nonce: 6is5Pq .. section: Library Add ``%:z`` strftime format code (generates tzoffset with colons as separator), see :ref:`strftime-strptime-behavior`. .. .. date: 2022-08-11-18-52-17 .. gh-issue: 95899 .. nonce: _Bi4uG .. section: Library Fix :class:`asyncio.Runner` to call :func:`asyncio.set_event_loop` only once to avoid calling :meth:`~asyncio.AbstractChildWatcher.attach_loop` multiple times on child watchers. Patch by Kumar Aditya. .. .. date: 2022-08-11-18-22-29 .. gh-issue: 95736 .. nonce: LzRZXe .. section: Library Fix :class:`unittest.IsolatedAsyncioTestCase` to set event loop before calling setup functions. Patch by Kumar Aditya. .. .. date: 2022-08-11-03-16-48 .. gh-issue: 95865 .. nonce: 0IOkFP .. section: Library Speed up :func:`urllib.parse.quote_from_bytes` by replacing a list comprehension with ``map()``. .. .. date: 2022-08-10-17-34-07 .. gh-issue: 95861 .. nonce: qv-T5s .. section: Library Add support for computing Spearman's correlation coefficient to the existing statistics.correlation() function. .. .. date: 2022-08-10-11-54-04 .. gh-issue: 95804 .. nonce: i5FCFK .. section: Library Fix ``logging`` shutdown handler so it respects ``MemoryHandler.flushOnClose``. .. .. date: 2022-08-08-01-42-11 .. gh-issue: 95704 .. nonce: MOPFfX .. section: Library When a task catches :exc:`asyncio.CancelledError` and raises some other error, the other error should generally not silently be suppressed. .. .. date: 2022-08-07-14-56-23 .. gh-issue: 95149 .. nonce: U0c6Ib .. section: Library The :class:`HTTPStatus ` enum offers a couple of properties to indicate the HTTP status category e.g. ``HTTPStatus.OK.is_success``. .. .. date: 2022-08-03-21-01-17 .. gh-issue: 95609 .. nonce: xxyjyX .. section: Library Update bundled pip to 22.2.2. .. .. date: 2022-08-03-16-52-32 .. gh-issue: 95289 .. nonce: FMnHlV .. section: Library Fix :class:`asyncio.TaskGroup` to propagate exception when :exc:`asyncio.CancelledError` was replaced with another exception by a context manger. Patch by Kumar Aditya and Guido van Rossum. .. .. date: 2022-07-29-20-58-37 .. gh-issue: 94909 .. nonce: YjMusj .. section: Library Fix incorrect joining of relative Windows paths with drives in :class:`pathlib.PurePath` initializer. .. .. date: 2022-07-28-17-14-38 .. gh-issue: 95385 .. nonce: 6YlsDI .. section: Library Faster ``json.dumps()`` when sorting of keys is not requested (default). .. .. date: 2022-07-27-19-47-51 .. gh-issue: 83901 .. nonce: OSw06c .. section: Library Improve :meth:`Signature.bind ` error message for missing keyword-only arguments. .. .. date: 2022-07-27-19-43-07 .. gh-issue: 95339 .. nonce: NuVQ68 .. section: Library Update bundled pip to 22.2.1. .. .. date: 2022-07-27-11-35-45 .. gh-issue: 95045 .. nonce: iysT-Q .. section: Library Fix GC crash when deallocating ``_lsprof.Profiler`` by untracking it before calling any callbacks. Patch by Kumar Aditya. .. .. date: 2022-07-25-15-45-06 .. gh-issue: 95231 .. nonce: i807-g .. section: Library Fail gracefully if :const:`~errno.EPERM` or :const:`~errno.ENOSYS` is raised when loading :mod:`!crypt` methods. This may happen when trying to load ``MD5`` on a Linux kernel with :abbr:`FIPS (Federal Information Processing Standard)` enabled. .. .. date: 2022-07-24-18-00-42 .. gh-issue: 95097 .. nonce: lu5qNf .. section: Library Fix :func:`asyncio.run` for :class:`asyncio.Task` implementations without :meth:`~asyncio.Task.uncancel` method. Patch by Kumar Aditya. .. .. date: 2022-07-24-12-59-02 .. gh-issue: 95087 .. nonce: VvqXkN .. section: Library Fix IndexError in parsing invalid date in the :mod:`email` module. .. .. date: 2022-07-24-12-00-06 .. gh-issue: 95199 .. nonce: -5A64k .. section: Library Upgrade bundled setuptools to 63.2.0. .. .. date: 2022-07-24-09-15-35 .. gh-issue: 95194 .. nonce: ERVmqG .. section: Library Upgrade bundled pip to 22.2. .. .. date: 2022-07-23-10-50-05 .. gh-issue: 93899 .. nonce: VT34A5 .. section: Library Fix check for existence of :const:`os.EFD_CLOEXEC`, :const:`os.EFD_NONBLOCK` and :const:`os.EFD_SEMAPHORE` flags on older kernel versions where these flags are not present. Patch by Kumar Aditya. .. .. date: 2022-07-23-10-42-05 .. gh-issue: 95166 .. nonce: xw6p3C .. section: Library Fix :meth:`concurrent.futures.Executor.map` to cancel the currently waiting on future on an error - e.g. TimeoutError or KeyboardInterrupt. .. .. date: 2022-07-22-21-18-17 .. gh-issue: 95132 .. nonce: n9anlw .. section: Library Fix a :mod:`sqlite3` regression where ``*args`` and ``**kwds`` were incorrectly relayed from :py:func:`~sqlite3.connect` to the :class:`~sqlite3.Connection` factory. The regression was introduced in 3.11a1 with PR 24421 (:gh:`85128`). Patch by Erlend E. Aasland.` .. .. date: 2022-07-22-17-19-57 .. gh-issue: 93157 .. nonce: RXByAk .. section: Library Fix :mod:`fileinput` module didn't support ``errors`` option when ``inplace`` is true. .. .. date: 2022-07-22-09-09-08 .. gh-issue: 91212 .. nonce: 53O8Ab .. section: Library Fixed flickering of the turtle window when the tracer is turned off. Patch by Shin-myoung-serp. .. .. date: 2022-07-22-00-58-49 .. gh-issue: 95077 .. nonce: 4Z6CNC .. section: Library Add deprecation warning for enum ``member.member`` access (e.g. ``Color.RED.BLUE``). Remove ``EnumMeta.__getattr__``. .. .. date: 2022-07-21-22-59-22 .. gh-issue: 95109 .. nonce: usxA9r .. section: Library Ensure that timeouts scheduled with :class:`asyncio.Timeout` that have already expired are delivered promptly. .. .. date: 2022-07-21-19-55-49 .. gh-issue: 95105 .. nonce: BIX2Km .. section: Library :meth:`wsgiref.types.InputStream.__iter__` should return ``Iterator[bytes]``, not ``Iterable[bytes]``. Patch by Shantanu Jain. .. .. date: 2022-07-20-22-49-48 .. gh-issue: 95066 .. nonce: TuCu0E .. section: Library Replaced assert with exception in :func:`ast.parse`, when ``feature_version`` has an invalid major version. Patch by Shantanu Jain. .. .. date: 2022-07-20-00-23-58 .. gh-issue: 77617 .. nonce: XGaqSQ .. section: Library Add :mod:`sqlite3` :ref:`command-line interface `. Patch by Erlend Aasland. .. .. date: 2022-07-19-15-37-11 .. gh-issue: 95005 .. nonce: iRmZ74 .. section: Library Replace :c:expr:`_PyAccu` with :c:expr:`_PyUnicodeWriter` in JSON encoder and StringIO and remove the :c:expr:`_PyAccu` implementation. .. .. date: 2022-07-17-22-31-32 .. gh-issue: 90085 .. nonce: c4FWcS .. section: Library Remove ``-c/--clock`` and ``-t/--time`` CLI options of :mod:`timeit`. The options had been deprecated since Python 3.3 and the functionality was removed in Python 3.7. Patch by Shantanu Jain. .. .. date: 2022-07-15-08-13-51 .. gh-issue: 94857 .. nonce: 9_KvZJ .. section: Library Fix refleak in ``_io.TextIOWrapper.reconfigure``. Patch by Kumar Aditya. .. .. date: 2022-07-14-00-43-52 .. gh-issue: 94821 .. nonce: e17ghU .. section: Library Fix binding of unix socket to empty address on Linux to use an available address from the abstract namespace, instead of "\0". .. .. date: 2022-07-11-10-41-48 .. gh-issue: 94736 .. nonce: EbsgeK .. section: Library Fix crash when deallocating an instance of a subclass of ``_multiprocessing.SemLock``. Patch by Kumar Aditya. .. .. date: 2022-07-09-15-17-02 .. gh-issue: 81620 .. nonce: L0O_bV .. section: Library Add random.binomialvariate(). .. .. date: 2022-07-09-08-55-04 .. gh-issue: 74116 .. nonce: 0XwYC1 .. section: Library Allow :meth:`asyncio.StreamWriter.drain` to be awaited concurrently by multiple tasks. Patch by Kumar Aditya. .. .. date: 2022-07-08-17-49-12 .. gh-issue: 87822 .. nonce: F9dzkf .. section: Library When called with ``capture_locals=True``, the :mod:`traceback` module functions swallow exceptions raised from calls to ``repr()`` on local variables of frames. This is in order to prioritize the original exception over rendering errors. An indication of the failure is printed in place of the missing value. (Patch by Simon-Martin Schroeder). .. .. date: 2022-07-08-08-39-35 .. gh-issue: 88050 .. nonce: 0aOC_m .. section: Library Fix :mod:`asyncio` subprocess transport to kill process cleanly when process is blocked and avoid ``RuntimeError`` when loop is closed. Patch by Kumar Aditya. .. .. date: 2022-07-07-15-46-55 .. gh-issue: 94637 .. nonce: IYEiUM .. section: Library :meth:`SSLContext.set_default_verify_paths` now releases the GIL around ``SSL_CTX_set_default_verify_paths`` call. The function call performs I/O and CPU intensive work. .. .. date: 2022-07-06-22-41-51 .. gh-issue: 94309 .. nonce: _XswsX .. section: Library Deprecate aliases :class:`typing.Hashable` and :class:`typing.Sized` .. .. date: 2022-07-06-21-24-03 .. gh-issue: 92546 .. nonce: s5Upkh .. section: Library An undocumented ``python -m pprint`` benchmark is moved into ``pprint`` suite of pyperformance. Patch by Oleg Iarygin. .. .. date: 2022-07-06-16-01-08 .. gh-issue: 94607 .. nonce: Q6RYfz .. section: Library Fix subclassing complex generics with type variables in :mod:`typing`. Previously an error message saying ``Some type variables ... are not listed in Generic[...]`` was shown. :mod:`typing` no longer populates ``__parameters__`` with the ``__parameters__`` of a Python class. .. .. date: 2022-07-06-14-57-33 .. gh-issue: 94619 .. nonce: PRqKVX .. section: Library Remove the long-deprecated ``module_repr()`` from :mod:`importlib`. .. .. date: 2022-07-06-14-45-12 .. gh-issue: 93910 .. nonce: iZcp67 .. section: Library The ability to access the other values of an enum on an enum (e.g. ``Color.RED.BLUE``) has been restored in order to fix a performance regression. .. .. date: 2022-07-06-06-02-02 .. gh-issue: 93896 .. nonce: vIgWGr .. section: Library Fix :func:`asyncio.run` and :class:`unittest.IsolatedAsyncioTestCase` to always the set event loop as it was done in Python 3.10 and earlier. Patch by Kumar Aditya. .. .. date: 2022-07-05-17-22-00 .. gh-issue: 94343 .. nonce: kf4H5r .. section: Library Allow setting the attributes of ``reprlib.Repr`` during object initialization .. .. date: 2022-07-03-16-41-03 .. gh-issue: 94382 .. nonce: zuVZeM .. section: Library Port static types of ``_multiprocessing`` module to heap types. Patch by Kumar Aditya. .. .. date: 2022-07-03-16-26-35 .. gh-issue: 78724 .. nonce: XNiJzf .. section: Library Fix crash in :class:`struct.Struct` when it was not completely initialized by initializing it in :meth:`~object.__new__``. Patch by Kumar Aditya. .. .. date: 2022-07-02-19-46-30 .. gh-issue: 94510 .. nonce: xOatDC .. section: Library Re-entrant calls to :func:`sys.setprofile` and :func:`sys.settrace` now raise :exc:`RuntimeError`. Patch by Pablo Galindo. .. .. date: 2022-06-29-09-48-37 .. gh-issue: 92336 .. nonce: otA6c6 .. section: Library Fix bug where :meth:`linecache.getline` fails on bad files with :exc:`UnicodeDecodeError` or :exc:`SyntaxError`. It now returns an empty string as per the documentation. .. .. date: 2022-06-29-04-42-56 .. gh-issue: 94398 .. nonce: YOq_bJ .. section: Library Once a :class:`asyncio.TaskGroup` has started shutting down (i.e., at least one task has failed and the task group has started cancelling the remaining tasks), it should not be possible to add new tasks to the task group. .. .. date: 2022-06-28-14-41-22 .. gh-issue: 94383 .. nonce: CXnquo .. section: Library :mod:`xml.etree`: Remove the ``ElementTree.Element.copy()`` method of the pure Python implementation, deprecated in Python 3.10, use the :func:`copy.copy` function instead. The C implementation of :mod:`xml.etree` has no ``copy()`` method, only a ``__copy__()`` method. Patch by Victor Stinner. .. .. date: 2022-06-28-14-29-21 .. gh-issue: 94379 .. nonce: RrgKfh .. section: Library :mod:`zipimport`: Remove ``find_loader()`` and ``find_module()`` methods, deprecated in Python 3.10: use the ``find_spec()`` method instead. See :pep:`451` for the rationale. Patch by Victor Stinner. .. .. date: 2022-06-28-00-24-48 .. gh-issue: 94352 .. nonce: JY1Ayt .. section: Library :func:`shlex.split`: Passing ``None`` for *s* argument now raises an exception, rather than reading :data:`sys.stdin`. The feature was deprecated in Python 3.9. Patch by Victor Stinner. .. .. date: 2022-06-27-10-33-18 .. gh-issue: 94318 .. nonce: jR4_QV .. section: Library Strip trailing spaces in :mod:`pydoc` text output. .. .. date: 2022-06-26-10-59-15 .. gh-issue: 89988 .. nonce: K8rnmt .. section: Library Fix memory leak in :class:`pickle.Pickler` when looking up :attr:`dispatch_table`. Patch by Kumar Aditya. .. .. date: 2022-06-25-23-44-44 .. gh-issue: 90016 .. nonce: EB409s .. section: Library Deprecate :mod:`sqlite3` :ref:`default adapters and converters `. Patch by Erlend E. Aasland. .. .. date: 2022-06-25-16-27-02 .. gh-issue: 94254 .. nonce: beP16v .. section: Library Fixed types of :mod:`struct` module to be immutable. Patch by Kumar Aditya. .. .. date: 2022-06-25-13-38-53 .. gh-issue: 93259 .. nonce: FAGw-2 .. section: Library Now raise ``ValueError`` when ``None`` or an empty string are passed to ``Distribution.from_name`` (and other callers). .. .. date: 2022-06-25-09-12-23 .. gh-issue: 74696 .. nonce: fxC9ua .. section: Library :func:`shutil.make_archive` now passes the *root_dir* argument to custom archivers which support it. .. .. date: 2022-06-24-20-00-57 .. gh-issue: 94216 .. nonce: hxnQPu .. section: Library The :mod:`dis` module now has the opcodes for pseudo instructions (those which are used by the compiler during code generation but then removed or replaced by real opcodes before the final bytecode is emitted). .. .. date: 2022-06-24-19-40-40 .. gh-issue: 93096 .. nonce: 3RlK2d .. section: Library Removed undocumented ``python -m codecs``. Use ``python -m unittest test.test_codecs.EncodedFileTest`` instead. .. .. date: 2022-06-24-19-23-59 .. gh-issue: 94207 .. nonce: VhS1eS .. section: Library Made :class:`_struct.Struct` GC-tracked in order to fix a reference leak in the :mod:`_struct` module. .. .. date: 2022-06-24-19-16-09 .. gh-issue: 93096 .. nonce: r1_oIc .. section: Library Removed undocumented ``-t`` argument of ``python -m base64``. Use ``python -m unittest test.test_base64.LegacyBase64TestCase.test_encodebytes`` instead. .. .. date: 2022-06-24-18-20-42 .. gh-issue: 94226 .. nonce: 8ZL4Fm .. section: Library Remove the :func:`locale.format` function, deprecated in Python 3.7: use :func:`locale.format_string` instead. Patch by Victor Stinner. .. .. date: 2022-06-24-17-11-33 .. gh-issue: 94199 .. nonce: 7releN .. section: Library Remove the :func:`ssl.match_hostname` function. The :func:`ssl.match_hostname` was deprecated in Python 3.7. OpenSSL performs hostname matching since Python 3.7, Python no longer uses the :func:`ssl.match_hostname` function. Patch by Victor Stinner. .. .. date: 2022-06-24-14-25-26 .. gh-issue: 94214 .. nonce: 03pXR5 .. section: Library Document the ``context`` object used in the ``venv.EnvBuilder`` class, and add the new environment's library path to it. .. .. date: 2022-06-24-10-39-56 .. gh-issue: 94199 .. nonce: MIuckY .. section: Library Remove the :func:`ssl.wrap_socket` function, deprecated in Python 3.7: instead, create a :class:`ssl.SSLContext` object and call its :class:`ssl.SSLContext.wrap_socket` method. Any package that still uses :func:`ssl.wrap_socket` is broken and insecure. The function neither sends a SNI TLS extension nor validates server hostname. Code is subject to `CWE-295 `_: Improper Certificate Validation. Patch by Victor Stinner. .. .. date: 2022-06-24-10-29-19 .. gh-issue: 94199 .. nonce: pfehmz .. section: Library Remove the :func:`ssl.RAND_pseudo_bytes` function, deprecated in Python 3.6: use :func:`os.urandom` or :func:`ssl.RAND_bytes` instead. Patch by Victor Stinner. .. .. date: 2022-06-24-10-18-59 .. gh-issue: 94199 .. nonce: kYOo8g .. section: Library :mod:`hashlib`: Remove the pure Python implementation of :func:`hashlib.pbkdf2_hmac()`, deprecated in Python 3.10. Python 3.10 and newer requires OpenSSL 1.1.1 (:pep:`644`): this OpenSSL version provides a C implementation of :func:`~hashlib.pbkdf2_hmac()` which is faster. Patch by Victor Stinner. .. .. date: 2022-06-24-09-41-41 .. gh-issue: 94196 .. nonce: r2KyfS .. section: Library :mod:`gzip`: Remove the ``filename`` attribute of :class:`gzip.GzipFile`, deprecated since Python 2.6, use the :attr:`~gzip.GzipFile.name` attribute instead. In write mode, the ``filename`` attribute added ``'.gz'`` file extension if it was not present. Patch by Victor Stinner. .. .. date: 2022-06-24-08-49-47 .. gh-issue: 94182 .. nonce: Wknau0 .. section: Library run the :class:`asyncio.PidfdChildWatcher` on the running loop, this allows event loops to run subprocesses when there is no default event loop running on the main thread .. .. date: 2022-06-23-14-35-10 .. gh-issue: 94169 .. nonce: jeba90 .. section: Library Remove ``io.OpenWrapper`` and ``_pyio.OpenWrapper``, deprecated in Python 3.10: just use :func:`open` instead. The :func:`open` (:func:`io.open`) function is a built-in function. Since Python 3.10, :func:`_pyio.open` is also a static method. Patch by Victor Stinner. .. .. date: 2022-06-23-13-12-05 .. gh-issue: 91742 .. nonce: sNytVX .. section: Library Fix :mod:`pdb` crash after jump caused by a null pointer dereference. Patch by Kumar Aditya. .. .. date: 2022-06-22-11-16-11 .. gh-issue: 94101 .. nonce: V9vDG8 .. section: Library Manual instantiation of :class:`ssl.SSLSession` objects is no longer allowed as it lead to misconfigured instances that crashed the interpreter when attributes where accessed on them. .. .. date: 2022-06-21-11-40-31 .. gh-issue: 84753 .. nonce: FW1pxO .. section: Library :func:`inspect.iscoroutinefunction`, :func:`inspect.isgeneratorfunction`, and :func:`inspect.isasyncgenfunction` now properly return ``True`` for duck-typed function-like objects like instances of :class:`unittest.mock.AsyncMock`. This makes :func:`inspect.iscoroutinefunction` consistent with the behavior of :func:`asyncio.iscoroutinefunction`. Patch by Mehdi ABAAKOUK. .. .. date: 2022-06-20-23-14-43 .. gh-issue: 94028 .. nonce: UofEcX .. section: Library Fix a regression in the :mod:`sqlite3` where statement objects were not properly cleared and reset after use in cursor iters. The regression was introduced by PR 27884 in Python 3.11a1. Patch by Erlend E. Aasland. .. .. date: 2022-06-18-15-06-54 .. gh-issue: 93973 .. nonce: 4y6UQT .. section: Library Add keyword argument ``all_errors`` to ``asyncio.create_connection`` so that multiple connection errors can be raised as an ``ExceptionGroup``. .. .. date: 2022-06-17-16-00-55 .. gh-issue: 93963 .. nonce: 8YYZ-2 .. section: Library Officially deprecate from ``importlib.abc`` classes moved to ``importlib.resources.abc``. .. .. date: 2022-06-17-12-02-30 .. gh-issue: 93858 .. nonce: R49ARc .. section: Library Prevent error when activating venv in nested fish instances. .. .. date: 2022-06-16-11-16-53 .. gh-issue: 93820 .. nonce: 00X0Y5 .. section: Library Pickle :class:`enum.Flag` by name. .. .. date: 2022-06-16-09-24-50 .. gh-issue: 93847 .. nonce: kuv8bN .. section: Library Fix repr of enum of generic aliases. .. .. date: 2022-06-15-21-35-11 .. gh-issue: 91404 .. nonce: 39TZzW .. section: Library Revert the :mod:`re` memory leak when a match is terminated by a signal or memory allocation failure as the implemented fix caused a major performance regression. .. .. date: 2022-06-15-21-28-16 .. gh-issue: 83499 .. nonce: u3DQJ- .. section: Library Fix double closing of file description in :mod:`tempfile`. .. .. date: 2022-06-15-21-20-02 .. gh-issue: 93820 .. nonce: FAMLY8 .. section: Library Fixed a regression when :func:`copy.copy`-ing :class:`enum.Flag` with multiple flag members. .. .. date: 2022-06-11-13-32-17 .. gh-issue: 79512 .. nonce: A1KTDr .. section: Library Fixed names and ``__module__`` value of :mod:`weakref` classes :class:`~weakref.ReferenceType`, :class:`~weakref.ProxyType`, :class:`~weakref.CallableProxyType`. It makes them pickleable. .. .. date: 2022-06-09-17-15-26 .. gh-issue: 91389 .. nonce: OE4vS5 .. section: Library Fix an issue where :mod:`dis` utilities could report missing or incorrect position information in the presence of ``CACHE`` entries. .. .. date: 2022-06-09-14-44-21 .. gh-issue: 93626 .. nonce: sfghs46 .. section: Library Set ``__future__.annotations`` to have a ``None`` mandatoryRelease to indicate that it is currently 'TBD'. .. .. date: 2022-06-09-10-12-55 .. gh-issue: 90473 .. nonce: 683m_C .. section: Library Emscripten and WASI have no home directory and cannot provide :pep:`370` user site directory. .. .. date: 2022-06-08-20-11-02 .. gh-issue: 90494 .. nonce: LIZT85 .. section: Library :func:`copy.copy` and :func:`copy.deepcopy` now always raise a TypeError if ``__reduce__()`` returns a tuple with length 6 instead of silently ignore the 6th item or produce incorrect result. .. .. date: 2022-06-07-14-53-46 .. gh-issue: 90549 .. nonce: T4FMKY .. section: Library Fix a multiprocessing bug where a global named resource (such as a semaphore) could leak when a child process is spawned (as opposed to forked). .. .. date: 2022-06-06-13-19-43 .. gh-issue: 93521 .. nonce: _vE8m9 .. section: Library Fixed a case where dataclasses would try to add ``__weakref__`` into the ``__slots__`` for a dataclass that specified ``weakref_slot=True`` when it was already defined in one of its bases. This resulted in a ``TypeError`` upon the new class being created. .. .. date: 2022-06-06-12-58-27 .. gh-issue: 79579 .. nonce: e8rB-M .. section: Library :mod:`sqlite3` now correctly detects DML queries with leading comments. Patch by Erlend E. Aasland. .. .. date: 2022-06-05-22-22-42 .. gh-issue: 93421 .. nonce: 43UO_8 .. section: Library Update :data:`sqlite3.Cursor.rowcount` when a DML statement has run to completion. This fixes the row count for SQL queries like ``UPDATE ... RETURNING``. Patch by Erlend E. Aasland. .. .. date: 2022-06-04-00-11-54 .. gh-issue: 93475 .. nonce: vffFw1 .. section: Library Expose ``FICLONE`` and ``FICLONERANGE`` constants in :mod:`fcntl`. Patch by Illia Volochii. .. .. date: 2022-06-03-22-13-28 .. gh-issue: 93370 .. nonce: tjfu9L .. section: Library Deprecate :data:`sqlite3.version` and :data:`sqlite3.version_info`. .. .. date: 2022-06-02-08-40-58 .. gh-issue: 91810 .. nonce: Gtk44w .. section: Library Suppress writing an XML declaration in open files in ``ElementTree.write()`` with ``encoding='unicode'`` and ``xml_declaration=None``. .. .. date: 2022-06-01-11-24-13 .. gh-issue: 91162 .. nonce: NxvU_u .. section: Library Support splitting of unpacked arbitrary-length tuple over ``TypeVar`` and ``TypeVarTuple`` parameters. For example: * ``A[T, *Ts][*tuple[int, ...]]`` -> ``A[int, *tuple[int, ...]]`` * ``A[*Ts, T][*tuple[int, ...]]`` -> ``A[*tuple[int, ...], int]`` .. .. date: 2022-05-31-14-58-40 .. gh-issue: 93353 .. nonce: 9Hvm6o .. section: Library Fix the :func:`importlib.resources.as_file` context manager to remove the temporary file if destroyed late during Python finalization: keep a local reference to the :func:`os.remove` function. Patch by Victor Stinner. .. .. date: 2022-05-30-21-42-50 .. gh-issue: 83658 .. nonce: 01Ntx0 .. section: Library Make :class:`multiprocessing.Pool` raise an exception if ``maxtasksperchild`` is not ``None`` or a positive int. .. .. date: 2022-05-28-08-02-55 .. gh-issue: 93312 .. nonce: HY0Uzj .. section: Library Add :const:`os.PIDFD_NONBLOCK` flag to open a file descriptor for a process with :func:`os.pidfd_open` in non-blocking mode. Patch by Kumar Aditya. .. .. date: 2022-05-27-22-17-11 .. gh-issue: 88123 .. nonce: mkYl5q .. section: Library Implement Enum __contains__ that returns True or False to replace the deprecated behaviour that would sometimes raise a TypeError. .. .. date: 2022-05-27-13-18-18 .. gh-issue: 93297 .. nonce: e2zuHz .. section: Library Make asyncio task groups prevent child tasks from being GCed .. .. date: 2022-05-27-10-52-06 .. gh-issue: 85308 .. nonce: K6r-tJ .. section: Library Changed :class:`argparse.ArgumentParser` to use :term:`filesystem encoding and error handler` instead of default text encoding to read arguments from file (e.g. ``fromfile_prefix_chars`` option). This change affects Windows; argument file should be encoded with UTF-8 instead of ANSI Codepage. .. .. date: 2022-05-26-23-10-55 .. gh-issue: 93156 .. nonce: 4XfDVN .. section: Library Accessing the :attr:`pathlib.PurePath.parents` sequence of an absolute path using negative index values produced incorrect results. .. .. date: 2022-05-26-09-24-41 .. gh-issue: 93162 .. nonce: W1VuhU .. section: Library Add the ability for :func:`logging.config.dictConfig` to usefully configure :class:`~logging.handlers.QueueHandler` and :class:`~logging.handlers.QueueListener` as a pair, and add :func:`logging.getHandlerByName` and :func:`logging.getHandlerNames` APIs to allow access to handlers by name. .. .. date: 2022-05-26-08-41-34 .. gh-issue: 93243 .. nonce: uw6x5z .. section: Library The :mod:`smtpd` module was removed per the schedule in :pep:`594`. .. .. date: 2022-05-25-22-09-38 .. gh-issue: 92886 .. nonce: ylwDSc .. section: Library Replace ``assert`` statements with ``raise AssertionError()`` in :class:`~wsgiref.BaseHandler` so that the tested behaviour is maintained running with optimizations ``(-O)``. .. .. date: 2022-05-25-15-57-39 .. gh-issue: 90155 .. nonce: YMstB5 .. section: Library Fix broken :class:`asyncio.Semaphore` when acquire is cancelled. .. .. date: 2022-05-25-02-45-41 .. gh-issue: 90817 .. nonce: yxANgU .. section: Library The :func:`locale.resetlocale` function is deprecated and will be removed in Python 3.13. Use ``locale.setlocale(locale.LC_ALL, "")`` instead. Patch by Victor Stinner. .. .. date: 2022-05-25-00-21-28 .. gh-issue: 91513 .. nonce: 9VyCT4 .. section: Library Added ``taskName`` attribute to :mod:`logging` module for use with :mod:`asyncio` tasks. .. .. date: 2022-05-24-11-19-04 .. gh-issue: 74696 .. nonce: -cnf-A .. section: Library :func:`shutil.make_archive` no longer temporarily changes the current working directory during creation of standard ``.zip`` or tar archives. .. .. date: 2022-05-24-10-59-02 .. gh-issue: 92728 .. nonce: zxTifq .. section: Library The :func:`re.template` function and the corresponding :const:`re.TEMPLATE` and :const:`re.T` flags are restored after they were removed in 3.11.0b1, but they are now deprecated, so they might be removed from Python 3.13. .. .. date: 2022-05-22-23-46-18 .. gh-issue: 93033 .. nonce: wZfiL- .. section: Library Search in some strings (platform dependent i.e [U+0xFFFF, U+0x0100] on Windows or [U+0xFFFFFFFF, U+0x00010000] on Linux 64-bit) are now up to 10 times faster. .. .. date: 2022-05-22-16-08-01 .. gh-issue: 89973 .. nonce: jc-Q4g .. section: Library Fix :exc:`re.error` raised in :mod:`fnmatch` if the pattern contains a character range with upper bound lower than lower bound (e.g. ``[c-a]``). Now such ranges are interpreted as empty ranges. .. .. date: 2022-05-21-13-16-16 .. gh-issue: 93044 .. nonce: eJ_XkZ .. section: Library No longer convert the database argument of :func:`sqlite3.connect` to bytes before passing it to the factory. .. .. date: 2022-05-20-15-52-43 .. gh-issue: 93010 .. nonce: WF-cAc .. section: Library In a very special case, the email package tried to append the nonexistent ``InvalidHeaderError`` to the defect list. It should have been ``InvalidHeaderDefect``. .. .. date: 2022-05-19-22-34-42 .. gh-issue: 92986 .. nonce: e6uKxj .. section: Library Fix :func:`ast.unparse` when ``ImportFrom.level`` is None .. .. date: 2022-05-19-17-49-58 .. gh-issue: 92932 .. nonce: o2peTh .. section: Library Now :func:`~dis.dis` and :func:`~dis.get_instructions` handle operand values for instructions prefixed by ``EXTENDED_ARG_QUICK``. Patch by Sam Gross and Dong-hee Na. .. .. date: 2022-05-19-13-33-18 .. gh-issue: 92675 .. nonce: ZeerMZ .. section: Library Fix :func:`venv.ensure_directories` to accept :class:`pathlib.Path` arguments in addition to :class:`str` paths. Patch by David Foster. .. .. date: 2022-05-18-21-04-09 .. gh-issue: 87901 .. nonce: lnf041 .. section: Library Removed the ``encoding`` argument from :func:`os.popen` that was added in 3.11b1. .. .. date: 2022-05-18-17-18-41 .. gh-issue: 91922 .. nonce: DwWIsJ .. section: Library Fix function :func:`sqlite.connect` and the :class:`sqlite.Connection` constructor on non-UTF-8 locales. Also, they now support bytes paths non-decodable with the current FS encoding. .. .. date: 2022-05-17-06-27-39 .. gh-issue: 92869 .. nonce: t8oBkw .. section: Library Added :class:`~ctypes.c_time_t` to :mod:`ctypes`, which has the same size as the :c:type:`time_t` type in C. .. .. date: 2022-05-16-14-35-39 .. gh-issue: 92839 .. nonce: owSMyo .. section: Library Fixed crash resulting from calling bisect.insort() or bisect.insort_left() with the key argument not equal to None. .. .. date: 2022-05-14-11-41-23 .. gh-issue: 90473 .. nonce: kPdOZl .. section: Library :mod:`subprocess` now fails early on Emscripten and WASI platforms to work around missing :func:`os.pipe` on WASI. .. .. date: 2022-05-14-09-01-38 .. gh-issue: 89325 .. nonce: ys-2BZ .. section: Library Removed many old deprecated :mod:`unittest` features: :class:`~unittest.TestCase` method aliases, undocumented and broken :class:`~unittest.TestCase` method ``assertDictContainsSubset``, undocumented :meth:`TestLoader.loadTestsFromModule ` parameter *use_load_tests*, and an underscored alias of the :class:`~unittest.TextTestResult` class. .. .. date: 2022-05-12-15-19-00 .. gh-issue: 92734 .. nonce: d0wjDt .. section: Library Allow multi-element reprs emitted by :mod:`reprlib` to be pretty-printed using configurable indentation. .. .. date: 2022-05-11-19-33-27 .. gh-issue: 92671 .. nonce: KE4v6a .. section: Library Fixed :func:`ast.unparse` for empty tuples in the assignment target context. .. .. date: 2022-05-11-14-34-09 .. gh-issue: 91581 .. nonce: glkou2 .. section: Library :meth:`~datetime.datetime.utcfromtimestamp` no longer attempts to resolve ``fold`` in the pure Python implementation, since the fold is never 1 in UTC. In addition to being slightly faster in the common case, this also prevents some errors when the timestamp is close to :attr:`datetime.min `. Patch by Paul Ganssle. .. .. date: 2022-05-11-10-06-31 .. gh-issue: 86388 .. nonce: 7ivUtT .. section: Library Removed randrange() functionality deprecated since Python 3.10. Formerly, randrange(10.0) losslessly converted to randrange(10). Now, it raises a TypeError. Also, the exception raised for non-integral values such as randrange(10.5) or randrange('10') has been changed from ValueError to TypeError. .. .. date: 2022-05-10-16-30-40 .. gh-issue: 90385 .. nonce: 1_wBRQ .. section: Library Add :meth:`pathlib.Path.walk` as an alternative to :func:`os.walk`. .. .. date: 2022-05-10-07-57-27 .. gh-issue: 92550 .. nonce: Rk_UzM .. section: Library Fix :meth:`pathlib.Path.rglob` for empty pattern. .. .. date: 2022-05-09-22-27-11 .. gh-issue: 92591 .. nonce: V7RCk2 .. section: Library Allow :mod:`logging` filters to return a :class:`logging.LogRecord` instance so that filters attached to :class:`logging.Handler`\ s can enrich records without side effects on other handlers. .. .. date: 2022-05-09-21-31-41 .. gh-issue: 92445 .. nonce: tJosdm .. section: Library Fix a bug in :mod:`argparse` where ``nargs="*"`` would raise an error instead of returning an empty list when 0 arguments were supplied if choice was also defined in ``parser.add_argument``. .. .. date: 2022-05-09-11-55-04 .. gh-issue: 92547 .. nonce: CzVZft .. section: Library Remove undocumented :mod:`sqlite3` features deprecated in Python 3.10: * ``sqlite3.enable_shared_cache()`` * ``sqlite3.OptimizedUnicode`` Patch by Erlend E. Aasland. .. .. date: 2022-05-09-09-28-02 .. gh-issue: 92530 .. nonce: M4Q1RS .. section: Library Fix an issue that occurred after interrupting :func:`threading.Condition.notify`. .. .. date: 2022-05-09-01-27-25 .. gh-issue: 92531 .. nonce: vV7S_O .. section: Library The statistics.median_grouped() function now always return a float. Formerly, it did not convert the input type when for sequences of length one. .. .. date: 2022-05-08-19-21-14 .. gh-issue: 84131 .. nonce: rG5kI7 .. section: Library The :class:`pathlib.Path` deprecated method ``link_to`` has been removed. Use 3.10's :meth:`~pathlib.Path.hardlink_to` method instead as its semantics are consistent with that of :meth:`~pathlib.Path.symlink_to`. .. .. date: 2022-05-08-18-51-14 .. gh-issue: 89336 .. nonce: TL6ip7 .. section: Library Removed :mod:`configparser` module APIs: the ``SafeConfigParser`` class alias, the ``ParsingError.filename`` property and parameter, and the ``ConfigParser.readfp`` method, all of which were deprecated since Python 3.2. .. .. date: 2022-05-06-13-00-57 .. gh-issue: 92391 .. nonce: s-Lase .. section: Library Add :meth:`~object.__class_getitem__` to :class:`csv.DictReader` and :class:`csv.DictWriter`, allowing them to be parameterized at runtime. Patch by Marc Mueller. .. .. date: 2022-04-26-18-37-24 .. gh-issue: 91968 .. nonce: fuuH1_ .. section: Library Add ``SO_RTABLE`` and ``SO_USER_COOKIE`` constants to :mod:`socket`. .. .. date: 2022-04-25-10-23-01 .. gh-issue: 91810 .. nonce: DOHa6B .. section: Library :class:`~xml.etree.ElementTree.ElementTree` method :meth:`~xml.etree.ElementTree.ElementTree.write` and function :func:`~xml.etree.ElementTree.tostring` now use the text file's encoding ("UTF-8" if not available) instead of locale encoding in XML declaration when ``encoding="unicode"`` is specified. .. .. date: 2022-04-24-22-26-45 .. gh-issue: 81790 .. nonce: M5Rvpm .. section: Library :func:`os.path.splitdrive` now understands DOS device paths with UNC links (beginning ``\\?\UNC\``). Contributed by Barney Gale. .. .. date: 2022-04-21-19-14-29 .. gh-issue: 91760 .. nonce: 54AR-m .. section: Library Apply more strict rules for numerical group references and group names in regular expressions. Only sequence of ASCII digits is now accepted as a numerical reference. The group name in bytes patterns and replacement strings can now only contain ASCII letters and digits and underscore. .. .. date: 2022-04-15-22-07-36 .. gh-issue: 90622 .. nonce: 0C6l8h .. section: Library Worker processes for :class:`concurrent.futures.ProcessPoolExecutor` are no longer spawned on demand (a feature added in 3.9) when the multiprocessing context start method is ``"fork"`` as that can lead to deadlocks in the child processes due to a fork happening while threads are running. .. .. date: 2022-04-15-17-38-55 .. gh-issue: 91577 .. nonce: Ah7cLL .. section: Library Move imports in :class:`~multiprocessing.SharedMemory` methods to module level so that they can be executed late in python finalization. .. .. date: 2022-04-15-13-16-25 .. gh-issue: 91581 .. nonce: 9OGsrN .. section: Library Remove an unhandled error case in the C implementation of calls to :meth:`datetime.fromtimestamp ` with no time zone (i.e. getting a local time from an epoch timestamp). This should have no user-facing effect other than giving a possibly more accurate error message when called with timestamps that fall on 10000-01-01 in the local time. Patch by Paul Ganssle. .. .. date: 2022-04-15-11-29-38 .. gh-issue: 91539 .. nonce: 7WgVuA .. section: Library Improve performance of ``urllib.request.getproxies_environment`` when there are many environment variables .. .. date: 2022-04-14-08-37-16 .. gh-issue: 91524 .. nonce: g8PiIu .. section: Library Speed up the regular expression substitution (functions :func:`re.sub` and :func:`re.subn` and corresponding :class:`re.Pattern` methods) for replacement strings containing group references by 2--3 times. .. .. date: 2022-04-12-18-05-40 .. gh-issue: 91447 .. nonce: N_Fs4H .. section: Library Fix findtext in the xml module to only give an empty string when the text attribute is set to None. .. .. date: 2022-04-11-16-55-41 .. gh-issue: 91456 .. nonce: DK3KKl .. section: Library Deprecate current default auto() behavior: In 3.13 the default will be for for auto() to always return the largest member value incremented by 1, and to raise if incompatible value types are used. .. .. bpo: 47231 .. date: 2022-04-08-22-12-11 .. nonce: lvyglt .. section: Library Fixed an issue with inconsistent trailing slashes in tarfile longname directories. .. .. bpo: 39064 .. date: 2022-04-03-19-40-09 .. nonce: 76PbIz .. section: Library :class:`zipfile.ZipFile` now raises :exc:`zipfile.BadZipFile` instead of ``ValueError`` when reading a corrupt zip file in which the central directory offset is negative. .. .. bpo: 41287 .. date: 2022-04-03-11-25-02 .. nonce: 8CTdwf .. section: Library Fix handling of the ``doc`` argument in subclasses of :func:`property`. .. .. date: 2022-04-01-12-35-44 .. gh-issue: 90005 .. nonce: pvaLHQ .. section: Library :mod:`ctypes` dependency ``libffi`` is now detected with ``pkg-config``. .. .. bpo: 32547 .. date: 2022-04-01-09-43-54 .. nonce: NIUiNC .. section: Library The constructors for :class:`~csv.DictWriter` and :class:`~csv.DictReader` now coerce the ``fieldnames`` argument to a :class:`list` if it is an iterator. .. .. bpo: 35540 .. date: 2022-03-22-18-28-55 .. nonce: nyijX9 .. section: Library Fix :func:`dataclasses.asdict` crash when :class:`collections.defaultdict` is present in the attributes. .. .. bpo: 47063 .. date: 2022-03-19-04-41-42 .. nonce: nwRfUo .. section: Library Add an index_pages parameter to support using non-default index page names. .. .. bpo: 47025 .. date: 2022-03-16-14-24-14 .. nonce: qtT3CE .. section: Library Drop support for :class:`bytes` on :data:`sys.path`. .. .. bpo: 46951 .. date: 2022-03-08-04-46-44 .. nonce: SWAz97 .. section: Library Order the contents of zipapp archives, to make builds more reproducible. .. .. bpo: 42777 .. date: 2022-02-21-01-37-00 .. nonce: nWK3E6 .. section: Library Implement :meth:`pathlib.Path.is_mount` for Windows paths. .. .. bpo: 46755 .. date: 2022-02-15-12-40-48 .. nonce: zePJfx .. section: Library In :class:`QueueHandler`, clear ``stack_info`` from :class:`LogRecord` to prevent stack trace from being written twice. .. .. bpo: 45393 .. date: 2022-02-09-23-44-27 .. nonce: 9v5Y8U .. section: Library Fix the formatting for ``await x`` and ``not x`` in the operator precedence table when using the :func:`help` system. .. .. bpo: 46642 .. date: 2022-02-05-18-46-54 .. nonce: YI6nHQ .. section: Library Improve error message when trying to subclass an instance of :data:`typing.TypeVar`, :data:`typing.ParamSpec`, :data:`typing.TypeVarTuple`, etc. Based on patch by Gregory Beauregard. .. .. bpo: 46364 .. date: 2022-01-14-10-49-20 .. nonce: SzhlU9 .. section: Library Restrict use of sockets instead of pipes for stdin of subprocesses created by :mod:`asyncio` to AIX platform only. .. .. bpo: 28249 .. date: 2022-01-09-14-23-00 .. nonce: 4dzB80 .. section: Library Set :attr:`doctest.DocTest.lineno` to ``None`` when object does not have :attr:`__doc__`. .. .. bpo: 46197 .. date: 2022-01-03-15-07-06 .. nonce: Z0djv6 .. section: Library Fix :mod:`ensurepip` environment isolation for subprocess running ``pip``. .. .. bpo: 45924 .. date: 2021-12-27-15-32-15 .. nonce: 0ZpHX2 .. section: Library Fix :mod:`asyncio` incorrect traceback when future's exception is raised multiple times. Patch by Kumar Aditya. .. .. bpo: 45046 .. date: 2021-08-29-19-59-16 .. nonce: eGq0NC .. section: Library Add support of context managers in :mod:`unittest`: methods :meth:`~unittest.TestCase.enterContext` and :meth:`~unittest.TestCase.enterClassContext` of class :class:`~unittest.TestCase`, method :meth:`~unittest.IsolatedAsyncioTestCase.enterAsyncContext` of class :class:`~unittest.IsolatedAsyncioTestCase` and function :func:`unittest.enterModuleContext`. .. .. bpo: 44173 .. date: 2021-08-27-18-07-35 .. nonce: oW92Ev .. section: Library Enable fast seeking of uncompressed unencrypted :class:`zipfile.ZipExtFile` .. .. bpo: 42627 .. date: 2021-05-22-07-58-59 .. nonce: EejtD0 .. section: Library Fix incorrect parsing of Windows registry proxy settings .. .. bpo: 42047 .. date: 2020-10-15-18-37-12 .. nonce: XDdoSF .. section: Library Add :func:`threading.get_native_id` support for DragonFly BSD. Patch by David Carlier. .. .. bpo: 14243 .. date: 2020-09-28-04-56-04 .. nonce: YECnxv .. section: Library The :class:`tempfile.NamedTemporaryFile` function has a new optional parameter *delete_on_close* .. .. bpo: 41246 .. date: 2020-07-08-20-32-13 .. nonce: 2trYf3 .. section: Library Give the same callback function for when the overlapped operation is done to the functions ``recv``, ``recv_into``, ``recvfrom``, ``sendto``, ``send`` and ``sendfile`` inside ``IocpProactor``. .. .. bpo: 39264 .. date: 2020-01-09-01-57-12 .. nonce: GsBL9- .. section: Library Fixed :meth:`collections.UserDict.get` to not call :meth:`__missing__` when a value is not found. This matches the behavior of :class:`dict`. Patch by Bar Harel. .. .. bpo: 38693 .. date: 2019-11-04-22-21-27 .. nonce: w_OAov .. section: Library :mod:`importlib` now uses f-strings internally instead of ``str.format``. .. .. bpo: 38267 .. date: 2019-09-25-00-37-51 .. nonce: X9Jb5V .. section: Library Add *timeout* parameter to :meth:`asyncio.loop.shutdown_default_executor`. The default value is ``None``, which means the executor will be given an unlimited amount of time. When called from :class:`asyncio.Runner` or :func:`asyncio.run`, the default timeout is 5 minutes. .. .. bpo: 34828 .. date: 2018-09-28-22-18-03 .. nonce: 5Zyi_S .. section: Library :meth:`sqlite3.Connection.iterdump` now handles databases that use ``AUTOINCREMENT`` in one or more tables. .. .. bpo: 32990 .. date: 2018-09-23-07-47-29 .. nonce: 2FVVTU .. section: Library Support reading wave files with the ``WAVE_FORMAT_EXTENSIBLE`` format in the :mod:`wave` module. .. .. bpo: 26253 .. date: 2017-07-31-13-35-28 .. nonce: 8v_sCs .. section: Library Allow adjustable compression level for tarfile streams in :func:`tarfile.open`. .. .. date: 2022-10-16-17-34-45 .. gh-issue: 85525 .. nonce: DvkD0v .. section: Documentation Remove extra row .. .. date: 2022-10-11-09-40-50 .. gh-issue: 86404 .. nonce: dEAb8W .. section: Documentation Deprecated tools ``make suspicious`` and ``rstlint.py`` are now removed. They have been replaced by `spinx-lint `_. .. .. date: 2022-10-02-10-58-52 .. gh-issue: 97741 .. nonce: 39l023 .. section: Documentation Fix ``!`` in c domain ref target syntax via a ``conf.py`` patch, so it works as intended to disable ref target resolution. .. .. date: 2022-09-01-17-03-04 .. gh-issue: 96432 .. nonce: 1EJ1-4 .. section: Documentation Fraction literals now support whitespace around the forward slash, ``Fraction('2 / 3')``. .. .. date: 2022-08-19-17-07-45 .. gh-issue: 96098 .. nonce: nDp43u .. section: Documentation Improve discoverability of the higher level concurrent.futures module by providing clearer links from the lower level threading and multiprocessing modules. .. .. date: 2022-08-13-20-34-51 .. gh-issue: 95957 .. nonce: W9ZZAx .. section: Documentation What's New 3.11 now has instructions for how to provide compiler and linker flags for Tcl/Tk and OpenSSL on RHEL 7 and CentOS 7. .. .. date: 2022-08-12-01-12-52 .. gh-issue: 95588 .. nonce: PA0FI7 .. section: Documentation Clarified the conflicting advice given in the :mod:`ast` documentation about :func:`ast.literal_eval` being "safe" for use on untrusted input while at the same time warning that it can crash the process. The latter statement is true and is deemed unfixable without a large amount of work unsuitable for a bugfix. So we keep the warning and no longer claim that ``literal_eval`` is safe. .. .. date: 2022-08-03-13-35-08 .. gh-issue: 91207 .. nonce: eJ4pPf .. section: Documentation Fix stylesheet not working in Windows CHM htmlhelp docs and add warning that they are deprecated. Contributed by C.A.M. Gerlach. .. .. date: 2022-07-30-00-23-11 .. gh-issue: 95454 .. nonce: we7AFm .. section: Documentation Replaced incorrectly written true/false values in documentiation. Patch by Robert O'Shea .. .. date: 2022-07-29-23-02-19 .. gh-issue: 95451 .. nonce: -tgB93 .. section: Documentation Update library documentation with :ref:`availability information ` on WebAssembly platforms ``wasm32-emscripten`` and ``wasm32-wasi``. .. .. date: 2022-07-29-09-04-02 .. gh-issue: 95415 .. nonce: LKTyw6 .. section: Documentation Use consistent syntax for platform availability. The directive now supports a content body and emits a warning when it encounters an unknown platform. .. .. date: 2022-07-07-08-42-05 .. gh-issue: 94321 .. nonce: pmCIPb .. section: Documentation Document the :pep:`246` style protocol type :class:`sqlite3.PrepareProtocol`. .. .. date: 2022-06-19-18-18-22 .. gh-issue: 86128 .. nonce: 39DDTD .. section: Documentation Document a limitation in ThreadPoolExecutor where its exit handler is executed before any handlers in atexit. .. .. date: 2022-06-16-10-10-59 .. gh-issue: 61162 .. nonce: 1ypkG8 .. section: Documentation Clarify :mod:`sqlite3` behavior when :ref:`sqlite3-connection-context-manager`. .. .. date: 2022-06-15-12-12-49 .. gh-issue: 87260 .. nonce: epyI7D .. section: Documentation Align :mod:`sqlite3` argument specs with the actual implementation. .. .. date: 2022-05-29-21-22-54 .. gh-issue: 86986 .. nonce: lFXw8j .. section: Documentation The minimum Sphinx version required to build the documentation is now 3.2. .. .. date: 2022-05-26-14-51-25 .. gh-issue: 88831 .. nonce: 5Cccr5 .. section: Documentation Augmented documentation of asyncio.create_task(). Clarified the need to keep strong references to tasks and added a code snippet detailing how to do this. .. .. date: 2022-05-26-11-33-23 .. gh-issue: 86438 .. nonce: kEGGmK .. section: Documentation Clarify that :option:`-W` and :envvar:`PYTHONWARNINGS` are matched literally and case-insensitively, rather than as regular expressions, in :mod:`warnings`. .. .. date: 2022-05-20-18-42-10 .. gh-issue: 93031 .. nonce: c2RdJe .. section: Documentation Update tutorial introduction output to use 3.10+ SyntaxError invalid range. .. .. date: 2022-05-18-23-58-26 .. gh-issue: 92240 .. nonce: bHvYiz .. section: Documentation Added release dates for "What's New in Python 3.X" for 3.0, 3.1, 3.2, 3.8 and 3.10 .. .. bpo: 47161 .. date: 2022-03-30-17-56-01 .. nonce: gesHfS .. section: Documentation Document that :class:`pathlib.PurePath` does not collapse initial double slashes because they denote UNC paths. .. .. bpo: 40838 .. date: 2022-01-13-16-03-15 .. nonce: k3NVCf .. section: Documentation Document that :func:`inspect.getdoc`, :func:`inspect.getmodule`, and :func:`inspect.getsourcefile` might return ``None``. .. .. bpo: 43689 .. date: 2021-04-01-08-09-34 .. nonce: mqCfLe .. section: Documentation The ``Differ`` documentation now also mentions other whitespace characters, which make it harder to understand the diff output. .. .. bpo: 38056 .. date: 2019-09-12-08-28-17 .. nonce: 6ktYkc .. section: Documentation Overhaul the :ref:`error-handlers` documentation in :mod:`codecs`. .. .. bpo: 13553 .. date: 2017-12-10-19-13-39 .. nonce: gQbZs4 .. section: Documentation Document tkinter.Tk args. .. .. date: 2022-10-20-17-49-50 .. gh-issue: 95027 .. nonce: viRpJB .. section: Tests On Windows, when the Python test suite is run with the ``-jN`` option, the ANSI code page is now used as the encoding for the stdout temporary file, rather than using UTF-8 which can lead to decoding errors. Patch by Victor Stinner. .. .. date: 2022-09-08-18-31-26 .. gh-issue: 96624 .. nonce: 5cANM1 .. section: Tests Fixed the failure of repeated runs of ``test.test_unittest`` caused by side effects in ``test_dotted_but_module_not_loaded``. .. .. date: 2022-08-22-14-59-42 .. gh-issue: 95243 .. nonce: DeD66V .. section: Tests Mitigate the inherent race condition from using find_unused_port() in testSockName() by trying to find an unused port a few times before failing. Patch by Ross Burton. .. .. date: 2022-08-05-09-57-43 .. gh-issue: 95573 .. nonce: edMdQB .. section: Tests :source:`Lib/test/test_asyncio/test_ssl.py` exposed a bug in the macOS kernel where intense concurrent load on non-blocking sockets occasionally causes :const:`errno.ENOBUFS` ("No buffer space available") to be emitted. FB11063974 filed with Apple, in the mean time as a workaround buffer size used in tests on macOS is decreased to avoid intermittent failures. Patch by Fantix King. .. .. date: 2022-07-26-15-22-19 .. gh-issue: 95280 .. nonce: h8HvbP .. section: Tests Fix problem with ``test_ssl`` ``test_get_ciphers`` on systems that require perfect forward secrecy (PFS) ciphers. .. .. date: 2022-07-24-20-19-05 .. gh-issue: 95212 .. nonce: fHiU4e .. section: Tests Make multiprocessing test case ``test_shared_memory_recreate`` parallel-safe. .. .. date: 2022-07-24-17-24-42 .. gh-issue: 95218 .. nonce: zfBLtu .. section: Tests Move tests for importlib.resources into test_importlib.resources. .. .. date: 2022-07-24-16-28-31 .. gh-issue: 93963 .. nonce: UB9azu .. section: Tests Updated tests to use preferred location for ``importlib.resources`` ABCs. .. .. date: 2022-07-08-12-22-00 .. gh-issue: 94675 .. nonce: IiTs5f .. section: Tests Add a regression test for :mod:`re` exponentional slowdown when using rjsmin. .. .. date: 2022-07-05-17-53-13 .. gh-issue: 91330 .. nonce: Qys5IL .. section: Tests Added more tests for :mod:`dataclasses` to cover behavior with data descriptor-based fields. .. .. date: 2022-06-27-21-27-20 .. gh-issue: 94208 .. nonce: VR6HX- .. section: Tests ``test_ssl`` is now checking for supported TLS version and protocols in more tests. .. .. date: 2022-06-27-08-53-40 .. gh-issue: 94315 .. nonce: MoZT9t .. section: Tests Tests now check for DAC override capability instead of relying on :func:`os.geteuid`. .. .. date: 2022-06-21-17-37-46 .. gh-issue: 54781 .. nonce: BjVAVg .. section: Tests Rename test_tk to test_tkinter, and rename test_ttk_guionly to test_ttk. Patch by Victor Stinner. .. .. date: 2022-06-20-23-04-52 .. gh-issue: 93839 .. nonce: OE3Ybk .. section: Tests Move ``Lib/ctypes/test/`` to ``Lib/test/test_ctypes/``. Patch by Victor Stinner. .. .. date: 2022-06-17-15-20-09 .. gh-issue: 93951 .. nonce: CW1Vv4 .. section: Tests In test_bdb.StateTestCase.test_skip, avoid including auxiliary importers. .. .. date: 2022-06-17-13-55-11 .. gh-issue: 93957 .. nonce: X4ovYV .. section: Tests Provide nicer error reporting from subprocesses in test_venv.EnsurePipTest.test_with_pip. .. .. date: 2022-06-17-13-27-21 .. gh-issue: 93884 .. nonce: 5pvPvl .. section: Tests Add test cases for :c:func:`PyNumber_ToBase` that take a large number or a non-int object as parameter. .. .. date: 2022-06-16-21-38-18 .. gh-issue: 93852 .. nonce: U_Hl6s .. section: Tests test_asyncio, test_logging, test_socket and test_socketserver now create AF_UNIX domains in the current directory to no longer fail with ``OSError("AF_UNIX path too long")`` if the temporary directory (the :envvar:`TMPDIR` environment variable) is too long. Patch by Victor Stinner. .. .. date: 2022-06-16-17-50-58 .. gh-issue: 93353 .. nonce: JdpATx .. section: Tests regrtest now checks if a test leaks temporary files or directories if run with -jN option. Patch by Victor Stinner. .. .. date: 2022-06-10-21-18-14 .. gh-issue: 84461 .. nonce: 9TAb26 .. section: Tests ``run_tests.py`` now handles cross compiling env vars correctly and pass ``HOSTRUNNER`` to regression tests. .. .. date: 2022-06-08-22-32-56 .. gh-issue: 93616 .. nonce: e5Kkx2 .. section: Tests ``test_modulefinder`` now creates a temporary directory in ``ModuleFinderTest.setUp()`` instead of module scope. .. .. date: 2022-06-08-14-17-59 .. gh-issue: 93575 .. nonce: Xb2LNB .. section: Tests Fix issue with test_unicode test_raiseMemError. The test case now use ``test.support.calcobjsize`` to calculate size of PyUnicode structs. :func:`sys.getsizeof` may return different size when string has UTF-8 memory. .. .. date: 2022-06-05-10-16-45 .. gh-issue: 90473 .. nonce: QMu7A8 .. section: Tests WASI does not have a ``chmod(2)`` syscall. :func:`os.chmod` is now a dummy function on WASI. Skip all tests that depend on working :func:`os.chmod`. .. .. date: 2022-06-04-12-05-31 .. gh-issue: 90473 .. nonce: RSpjF7 .. section: Tests Skip tests on WASI that require symlinks with absolute paths. .. .. date: 2022-06-03-16-26-04 .. gh-issue: 57539 .. nonce: HxWgYO .. section: Tests Increase calendar test coverage for :meth:`calendar.LocaleTextCalendar.formatweekday`. .. .. date: 2022-06-03-14-18-37 .. gh-issue: 90473 .. nonce: 7iXVRK .. section: Tests Skip symlink tests on WASI. wasmtime uses ``openat2(2)`` with ``RESOLVE_BENEATH`` flag, which prevents symlinks with absolute paths. .. .. date: 2022-06-03-12-22-44 .. gh-issue: 89858 .. nonce: ftBvjE .. section: Tests Fix ``test_embed`` for out-of-tree builds. Patch by Kumar Aditya. .. .. date: 2022-05-25-23-07-15 .. gh-issue: 92886 .. nonce: Aki63_ .. section: Tests Fixing tests that fail when running with optimizations (``-O``) in ``test_imaplib.py``. .. .. date: 2022-05-25-23-00-35 .. gh-issue: 92886 .. nonce: Y-vrWj .. section: Tests Fixing tests that fail when running with optimizations (``-O``) in ``test_zipimport.py`` .. .. date: 2022-05-25-22-53-30 .. gh-issue: 92886 .. nonce: mIfdtz .. section: Tests Fixing tests that fail when running with optimizations (``-O``) in ``test_py_compile.py`` .. .. date: 2022-05-25-22-43-11 .. gh-issue: 92886 .. nonce: 9HQb9e .. section: Tests Fixing tests that fail when running with optimizations (``-O``) in ``test_sys_settrace.py``. .. .. date: 2022-05-25-22-34-10 .. gh-issue: 92886 .. nonce: 1Lkt8S .. section: Tests Fixing tests that fail when running with optimizations (``-O``) in ``_test_multiprocessing.py`` .. .. date: 2022-05-12-05-51-06 .. gh-issue: 92670 .. nonce: 7L43Z_ .. section: Tests Skip ``test_shutil.TestCopy.test_copyfile_nonexistent_dir`` test on AIX as the test uses a trailing slash to force the OS consider the path as a directory, but on AIX the trailing slash has no effect and is considered as a file. .. .. date: 2022-05-08-15-40-41 .. gh-issue: 92514 .. nonce: Xbf5JY .. section: Tests Remove unused ``test.support.BasicTestRunner``. Patch by Jelle Zijlstra. .. .. bpo: 47016 .. date: 2022-03-14-23-28-17 .. nonce: K-t2QX .. section: Tests Create a GitHub Actions workflow for verifying bundled pip and setuptools. Patch by Illia Volochii and Adam Turner. .. .. date: 2022-09-20-12-43-44 .. gh-issue: 96761 .. nonce: IF29kR .. section: Build Fix the build process of clang compiler for :program:`_bootstrap_python` if LTO optimization is applied. Patch by Matthias Görgens and Dong-hee Na. .. .. date: 2022-09-17-11-19-24 .. gh-issue: 96883 .. nonce: p_gr62 .. section: Build ``wasm32-emscripten`` builds for browsers now include :mod:`concurrent.futures` for :mod:`asyncio` and :mod:`unittest.mock`. .. .. date: 2022-09-12-18-34-51 .. gh-issue: 85936 .. nonce: tX4VCU .. section: Build CPython now uses the ThinLTO option as the default policy if the Clang compiler accepts the flag. Patch by Dong-hee Na. .. .. date: 2022-09-11-14-23-49 .. gh-issue: 96729 .. nonce: W4uBWL .. section: Build Ensure that Windows releases built with ``Tools\msi\buildrelease.bat`` are upgradable to and from official Python releases. .. .. date: 2022-08-26-11-50-03 .. gh-issue: 96269 .. nonce: x_J5h0 .. section: Build Shared module targets now depend on new ``MODULE_DEPS`` variable, which includes ``EXPORTSYMS``. This fixes a build order issue on unsupported AIX platform. .. .. date: 2022-08-26-11-09-11 .. gh-issue: 84461 .. nonce: Nsdn_R .. section: Build ``wasm32-emscripten`` platform no longer builds :mod:`resource` module, :func:`~os.getresuid`, :func:`~os.getresgid`, and their setters. The APIs are stubs and not functional. .. .. date: 2022-08-15-10-56-07 .. gh-issue: 95973 .. nonce: Bsswsc .. section: Build Add a new ``--with-dsymutil`` configure option to link debug information in macOS. Patch by Pablo Galindo. .. .. date: 2022-08-12-13-06-03 .. gh-issue: 90536 .. nonce: qMpF6p .. section: Build Use the BOLT post-link optimizer to improve performance, particularly on medium-to-large applications. .. .. date: 2022-08-04-15-29-35 .. gh-issue: 93744 .. nonce: svRuqm .. section: Build Remove the ``configure --with-cxx-main`` build option: it didn't work for many years. Remove the ``MAINCC`` variable from ``configure`` and ``Makefile``. Patch by Victor Stinner. .. .. date: 2022-07-26-18-13-34 .. gh-issue: 94801 .. nonce: 9fREfy .. section: Build Fix a regression in ``configure`` script that caused some header checks to ignore custom ``CPPFLAGS``. The regression was introduced in :gh:`94802`. .. .. date: 2022-07-25-09-48-43 .. gh-issue: 95145 .. nonce: ZNS3dj .. section: Build wasm32-wasi builds no longer depend on WASIX's pthread stubs. Python now has its own stubbed pthread API. .. .. date: 2022-07-25-08-59-35 .. gh-issue: 95174 .. nonce: g8woUW .. section: Build Python now detects missing ``dup`` function in WASI and works around some missing :mod:`errno`, :mod:`select`, and :mod:`socket` constants. .. .. date: 2022-07-23-21-39-09 .. gh-issue: 95174 .. nonce: 7cYMZR .. section: Build Python now skips missing :mod:`socket` functions and methods on WASI. WASI can only create sockets from existing fd / accept and has no netdb. .. .. date: 2022-07-21-09-17-01 .. gh-issue: 95085 .. nonce: E9x2S_ .. section: Build Platforms ``wasm32-unknown-emscripten`` and ``wasm32-unknown-wasi`` have been promoted to :pep:`11` tier 3 platform support. .. .. date: 2022-07-14-11-13-26 .. gh-issue: 94847 .. nonce: s3Kr5p .. section: Build Fixed ``_decimal`` module build issue on GCC when compiling with LTO and pydebug. Debug builds no longer force inlining of functions. .. .. date: 2022-07-14-02-45-44 .. gh-issue: 94841 .. nonce: lLRTdf .. section: Build Fix the possible performance regression of :c:func:`PyObject_Free` compiled with MSVC version 1932. .. .. date: 2022-07-13-10-13-10 .. gh-issue: 94801 .. nonce: 3xUB24 .. section: Build ``configure`` now uses custom flags like ``ZLIB_CFLAGS`` and ``ZLIB_LIBS`` when searching for headers and libraries. .. .. date: 2022-07-12-13-39-18 .. gh-issue: 94773 .. nonce: koHKm5 .. section: Build ``deepfreeze.py`` now supports code object with frozensets that contain incompatible, unsortable types. .. .. date: 2022-07-08-10-28-23 .. gh-issue: 94682 .. nonce: ZtGt_0 .. section: Build Build and test with OpenSSL 1.1.1q .. .. date: 2022-06-30-17-18-23 .. gh-issue: 90005 .. nonce: EIOOla .. section: Build Dependencies of :mod:`readline` and :mod:`curses` module are now detected in ``configure`` script with ``pkg-config``. Only ``ncurses`` / ``ncursesw`` are detected automatically. The old ``curses`` library is not configured automatically. Workaround for missing ``termcap`` or ``tinfo`` library has been removed. .. .. date: 2022-06-30-17-00-54 .. gh-issue: 90005 .. nonce: iiq5qD .. section: Build Fix building ``_ctypes`` extension without ``pkg-config``. .. .. date: 2022-06-30-09-57-39 .. gh-issue: 90005 .. nonce: 9-pQyR .. section: Build ``_dbm`` module dependencies are now detected by configure. .. .. date: 2022-06-29-08-58-31 .. gh-issue: 94404 .. nonce: 3MadM6 .. section: Build ``makesetup`` now works around an issue with sed on macOS and uses correct CFLAGS for object files that end up in a shared extension. Module CFLAGS are used before PY_STDMODULE_CFLAGS to avoid clashes with system headers. .. .. date: 2022-06-28-09-42-10 .. gh-issue: 93939 .. nonce: _VWxKW .. section: Build C extension modules are now built by ``configure`` and ``make`` instead of ``distutils`` and ``setup.py``. .. .. date: 2022-06-27-11-57-15 .. gh-issue: 93939 .. nonce: rv7s8W .. section: Build The ``2to3``, ``idle``, and ``pydoc`` scripts are now generated and installed by ``Makefile`` instead of ``setup.py``. .. .. date: 2022-06-25-23-25-47 .. gh-issue: 94280 .. nonce: YhEyW_ .. section: Build Updated pegen regeneration script on Windows to find and use Python 3.9 or higher. Prior to this, pegen regeneration already required 3.9 or higher, but the script may have used lower versions of Python. .. .. date: 2022-06-08-14-28-03 .. gh-issue: 93584 .. nonce: 0xfHOK .. section: Build Address race condition in ``Makefile`` when installing a PGO build. All ``test`` and ``install`` targets now depend on ``all`` target. .. .. date: 2022-06-04-12-53-53 .. gh-issue: 93491 .. nonce: ehM211 .. section: Build ``configure`` now detects and reports :pep:`11` support tiers. .. .. date: 2022-05-31-18-04-58 .. gh-issue: 69093 .. nonce: 6lSa0C .. section: Build Fix ``Modules/Setup.stdlib.in`` rule for ``_sqlite3`` extension. .. .. date: 2022-05-25-13-56-00 .. gh-issue: 93207 .. nonce: B9Rubf .. section: Build ``va_start()`` with two parameters, like ``va_start(args, format),`` is now required to build Python. ``va_start()`` is no longer called with a single parameter. Patch by Kumar Aditya. .. .. date: 2022-05-25-05-46-00 .. gh-issue: 93202 .. nonce: T37jtj .. section: Build Python now always use the ``%zu`` and ``%zd`` printf formats to format a :c:type:`size_t` or ``Py_ssize_t`` number. Building Python 3.12 requires a C11 compiler, so these printf formats are now always supported. Patch by Victor Stinner. .. .. date: 2022-05-12-10-19-15 .. gh-issue: 90473 .. nonce: -syvqK .. section: Build Disable pymalloc and increase stack size on ``wasm32-wasi``. .. .. bpo: 34449 .. date: 2018-08-21-11-10-18 .. nonce: Z3qm3c .. section: Build Drop invalid compiler switch ``-fPIC`` for HP aCC on HP-UX. Patch by Michael Osipov. .. .. date: 2022-10-19-20-00-28 .. gh-issue: 98360 .. nonce: O2m6YG .. section: Windows Fixes :mod:`multiprocessing` spawning child processes on Windows from a virtual environment to ensure that child processes that also use :mod:`multiprocessing` to spawn more children will recognize that they are in a virtual environment. .. .. date: 2022-10-19-19-35-37 .. gh-issue: 98414 .. nonce: FbHZuS .. section: Windows Fix :file:`py.exe` launcher handling of ``-V:/`` option when default preferences have been set in environment variables or configuration files. .. .. date: 2022-10-02-11-59-23 .. gh-issue: 97728 .. nonce: dIdlPE .. section: Windows Fix possible crashes caused by the use of uninitialized variables when pass invalid arguments in :func:`os.system` on Windows and in Windows-specific modules (like ``winreg``). .. .. date: 2022-09-29-23-08-49 .. gh-issue: 90989 .. nonce: no89Q2 .. section: Windows Made :ref:`launcher` install per-user by default (unless an all users install already exists), and clarify some text in the installer. .. .. date: 2022-09-29-22-27-04 .. gh-issue: 97649 .. nonce: bI7OQU .. section: Windows The ``Tools`` directory is no longer installed on Windows .. .. date: 2022-09-23-15-40-04 .. gh-issue: 96965 .. nonce: CsnEGs .. section: Windows Update libffi to 3.4.3 .. .. date: 2022-09-07-00-11-33 .. gh-issue: 96577 .. nonce: kV4K_1 .. section: Windows Fixes a potential buffer overrun in :mod:`!msilib`. .. .. date: 2022-09-05-18-32-47 .. gh-issue: 96559 .. nonce: 561sUd .. section: Windows Fixes the Windows launcher not using the compatible interpretation of default tags found in configuration files when no tag was passed to the command. .. .. date: 2022-08-30-12-01-51 .. gh-issue: 94781 .. nonce: OxO-Gr .. section: Windows Fix :file:`pcbuild.proj` to clean previous instances of output files in ``Python\deepfreeze`` and ``Python\frozen_modules`` directories on Windows. Patch by Charlie Zhao. .. .. date: 2022-08-26-00-11-18 .. gh-issue: 89545 .. nonce: zmJMY_ .. section: Windows Updates :mod:`platform` code getting the Windows version to use native Windows Management Instrumentation (WMI) queries to determine OS version, type, and architecture. .. .. date: 2022-08-10-22-46-48 .. gh-issue: 95733 .. nonce: 2_urOp .. section: Windows Make certain requirements of the Windows Store package optional to allow installing on earlier updates of Windows. .. .. date: 2022-08-04-18-47-54 .. gh-issue: 95656 .. nonce: VJ1d13 .. section: Windows Enable the :meth:`~sqlite3.Connection.enable_load_extension` :mod:`sqlite3` API. .. .. date: 2022-08-04-01-12-27 .. gh-issue: 95587 .. nonce: Fvdv5q .. section: Windows Fixes some issues where the Windows installer would incorrectly detect certain features of an existing install when upgrading. .. .. date: 2022-08-03-00-49-46 .. gh-issue: 94399 .. nonce: KvxHc0 .. section: Windows Restores the behaviour of :ref:`launcher` for ``/usr/bin/env`` shebang lines, which will now search :envvar:`PATH` for an executable matching the given command. If none is found, the usual search process is used. .. .. date: 2022-07-30-14-18-33 .. gh-issue: 95445 .. nonce: mjrTaq .. section: Windows Fixes the unsuccessful removal of the HTML document directory when uninstalling with Windows msi. .. .. date: 2022-07-28-20-21-38 .. gh-issue: 95359 .. nonce: ywMrgu .. section: Windows Fix :ref:`launcher` handling of :file:`py.ini` commands (it was incorrectly expecting a ``py_`` prefix on keys) and crashes when reading per-user configuration file. .. .. date: 2022-07-26-20-33-12 .. gh-issue: 95285 .. nonce: w6fa22 .. section: Windows Fix :ref:`launcher` handling of command lines where it is only passed a short executable name. .. .. date: 2022-07-16-16-18-32 .. gh-issue: 90844 .. nonce: vwITT3 .. section: Windows Allow virtual environments to correctly launch when they have spaces in the path. .. .. date: 2022-07-12-20-45-43 .. gh-issue: 94772 .. nonce: uNMmdG .. section: Windows Fix incorrect handling of shebang lines in py.exe launcher .. .. date: 2022-06-20-22-32-14 .. gh-issue: 94018 .. nonce: bycC3A .. section: Windows :mod:`zipfile` will now remove trailing spaces from path components when extracting files on Windows. .. .. date: 2022-06-15-01-03-52 .. gh-issue: 93824 .. nonce: mR4mxu .. section: Windows Drag and drop of files onto Python files in Windows Explorer has been enabled for Windows ARM64. .. .. date: 2022-05-28-19-36-13 .. gh-issue: 43414 .. nonce: NGMJ3g .. section: Windows :func:`os.get_terminal_size` now attempts to read the size from any provided handle, rather than only supporting file descriptors 0, 1 and 2. .. .. date: 2022-05-19-21-44-25 .. gh-issue: 92817 .. nonce: Jrf-Kv .. section: Windows Ensures that :file:`py.exe` will prefer an active virtual environment over default tags specified with environment variables or through a :file:`py.ini` file. .. .. date: 2022-05-19-14-01-30 .. gh-issue: 92984 .. nonce: Dsxnlr .. section: Windows Explicitly disable incremental linking for non-Debug builds .. .. date: 2022-05-16-11-45-06 .. gh-issue: 92841 .. nonce: NQx107 .. section: Windows :mod:`asyncio` no longer throws ``RuntimeError: Event loop is closed`` on interpreter exit after asynchronous socket activity. Patch by Oleg Iarygin. .. .. bpo: 46907 .. date: 2022-05-05-06-27-59 .. nonce: IW-uvT .. section: Windows Update Windows installer to use SQLite 3.38.4. .. .. date: 2022-04-12-18-35-20 .. gh-issue: 91061 .. nonce: x40hSK .. section: Windows Accept os.PathLike for the argument to winsound.PlaySound .. .. bpo: 42658 .. date: 2022-03-20-15-47-35 .. nonce: 16eXtb .. section: Windows Support native Windows case-insensitive path comparisons by using ``LCMapStringEx`` instead of :func:`str.lower` in :func:`ntpath.normcase`. Add ``LCMapStringEx`` to the :mod:`_winapi` module. .. .. bpo: 38704 .. date: 2020-01-10-23-33-03 .. nonce: 2Idtdn .. section: Windows Prevent installation on unsupported Windows versions. .. .. date: 2022-10-05-15-26-58 .. gh-issue: 97897 .. nonce: Rf-C6u .. section: macOS The macOS 13 SDK includes support for the ``mkfifoat`` and ``mknodat`` system calls. Using the ``dir_fd`` option with either :func:`os.mkfifo` or :func:`os.mknod` could result in a segfault if cpython is built with the macOS 13 SDK but run on an earlier version of macOS. Prevent this by adding runtime support for detection of these system calls ("weaklinking") as is done for other newer syscalls on macOS. .. .. date: 2022-10-15-21-20-40 .. gh-issue: 97527 .. nonce: otAHJM .. section: IDLE Fix a bug in the previous bugfix that caused IDLE to not start when run with 3.10.8, 3.12.0a1, and at least Microsoft Python 3.10.2288.0 installed without the Lib/test package. 3.11.0 was never affected. .. .. date: 2022-08-04-20-07-51 .. gh-issue: 65802 .. nonce: xnThWe .. section: IDLE Document handling of extensions in Save As dialogs. .. .. date: 2022-08-01-23-31-48 .. gh-issue: 95191 .. nonce: U7vryB .. section: IDLE Include prompts when saving Shell (interactive input and output). .. .. date: 2022-07-31-22-15-14 .. gh-issue: 95511 .. nonce: WX6PmB .. section: IDLE Fix the Shell context menu copy-with-prompts bug of copying an extra line when one selects whole lines. .. .. date: 2022-07-30-15-10-39 .. gh-issue: 95471 .. nonce: z3scVG .. section: IDLE In the Edit menu, move ``Select All`` and add a new separator. .. .. date: 2022-07-29-11-08-52 .. gh-issue: 95411 .. nonce: dazlqH .. section: IDLE Enable using IDLE's module browser with .pyw files. .. .. date: 2022-07-28-18-56-57 .. gh-issue: 89610 .. nonce: hcosiM .. section: IDLE Add .pyi as a recognized extension for IDLE on macOS. This allows opening stub files by double clicking on them in the Finder. .. .. date: 2022-10-07-22-06-11 .. gh-issue: 68686 .. nonce: 6KNIQ4 .. section: Tools/Demos Remove ptags and eptags scripts. .. .. date: 2022-09-30-18-35-11 .. gh-issue: 97681 .. nonce: -KO1Ba .. section: Tools/Demos Remove the ``Tools/demo/`` directory which contained old demo scripts. A copy can be found in the `old-demos project `_. Patch by Victor Stinner. .. .. date: 2022-09-30-14-30-12 .. gh-issue: 97669 .. nonce: gvbgcg .. section: Tools/Demos Remove outdated example scripts of the ``Tools/scripts/`` directory. A copy can be found in the `old-demos project `_. Patch by Victor Stinner. .. .. date: 2022-08-29-17-25-13 .. gh-issue: 95853 .. nonce: Ce17cT .. section: Tools/Demos The ``wasm_build.py`` script now pre-builds Emscripten ports, checks for broken EMSDK versions, and warns about pkg-config env vars. .. .. date: 2022-08-10-17-08-43 .. gh-issue: 95853 .. nonce: HCjC2m .. section: Tools/Demos The new tool ``Tools/wasm/wasm_builder.py`` automates configure, compile, and test steps for building CPython on WebAssembly platforms. .. .. date: 2022-08-05-23-25-59 .. gh-issue: 95731 .. nonce: N2KohU .. section: Tools/Demos Fix handling of module docstrings in :file:`Tools/i18n/pygettext.py`. .. .. date: 2022-07-04-10-02-02 .. gh-issue: 93939 .. nonce: U6sW6H .. section: Tools/Demos Add script ``Tools/scripts/check_modules.py`` to check and validate builtin and shared extension modules. The script also handles ``Modules/Setup`` and will eventually replace ``setup.py``. .. .. date: 2022-07-04-01-37-42 .. gh-issue: 94538 .. nonce: 1rgy1Y .. section: Tools/Demos Fix Argument Clinic output to custom file destinations. Patch by Erlend E. Aasland. .. .. date: 2022-06-29-22-47-11 .. gh-issue: 94430 .. nonce: hdov8L .. section: Tools/Demos Allow parameters named ``module`` and ``self`` with custom C names in Argument Clinic. Patch by Erlend E. Aasland .. .. date: 2022-06-19-14-56-33 .. gh-issue: 86087 .. nonce: R8MkRy .. section: Tools/Demos The ``Tools/scripts/parseentities.py`` script used to parse HTML4 entities has been removed. .. .. date: 2022-10-18-16-16-27 .. gh-issue: 98393 .. nonce: 55u4BF .. section: C API The :c:func:`PyUnicode_FSDecoder` function no longer accepts bytes-like paths, like :class:`bytearray` and :class:`memoryview` types: only the exact :class:`bytes` type is accepted for bytes strings. Patch by Victor Stinner. .. .. date: 2022-10-05-10-43-32 .. gh-issue: 91051 .. nonce: ODDRsQ .. section: C API Add :c:func:`PyType_Watch` and related APIs to allow callbacks on :c:func:`PyType_Modified`. .. .. date: 2022-10-03-20-33-24 .. gh-issue: 95756 .. nonce: SSmXlG .. section: C API Lazily create and cache ``co_`` attributes for better performance for code getters. .. .. date: 2022-09-20-01-04-57 .. gh-issue: 96512 .. nonce: msZTjF .. section: C API Configuration for the :ref:`integer string conversion length limitation ` now lives in the PyConfig C API struct. .. .. date: 2022-08-16-16-54-42 .. gh-issue: 95589 .. nonce: 6xE1ar .. section: C API Extensions classes that set ``tp_dictoffset`` and ``tp_weaklistoffset`` lose the support for multiple inheritance, but are now safe. Extension classes should use :c:macro:`Py_TPFLAGS_MANAGED_DICT` and :c:macro:`Py_TPFLAGS_MANAGED_WEAKREF` instead. .. .. date: 2022-08-08-14-36-31 .. gh-issue: 95781 .. nonce: W_G8YW .. section: C API An unrecognized format character in :c:func:`PyUnicode_FromFormat` and :c:func:`PyUnicode_FromFormatV` now sets a :exc:`SystemError`. In previous versions it caused all the rest of the format string to be copied as-is to the result string, and any extra arguments discarded. .. .. date: 2022-08-03-14-39-08 .. gh-issue: 92678 .. nonce: ozFTEx .. section: C API Restore the 3.10 behavior for multiple inheritance of C extension classes that store their dictionary at the end of the struct. .. .. date: 2022-08-03-13-01-57 .. gh-issue: 92678 .. nonce: DLwONN .. section: C API Support C extensions using managed dictionaries by setting the ``Py_TPFLAGS_MANAGED_DICT`` flag. .. .. date: 2022-08-01-16-21-39 .. gh-issue: 93274 .. nonce: QoDHEu .. section: C API API for implementing vectorcall (:c:macro:`Py_TPFLAGS_HAVE_VECTORCALL`, :c:func:`PyVectorcall_NARGS` and :c:func:`PyVectorcall_Call`) was added to the limited API and stable ABI. .. .. date: 2022-07-31-21-58-27 .. gh-issue: 95504 .. nonce: wy7B1F .. section: C API Fix sign placement when specifying width or precision in :c:func:`PyUnicode_FromFormat` and :c:func:`PyUnicode_FromFormatV`. Patch by Philip Georgi. .. .. date: 2022-07-29-15-24-45 .. gh-issue: 93012 .. nonce: -DdGEy .. section: C API The :c:macro:`Py_TPFLAGS_HAVE_VECTORCALL` flag is now removed from a class when the class's :py:meth:`~object.__call__` method is reassigned. This makes vectorcall safe to use with mutable types (i.e. heap types without the :const:`immutable ` flag). Mutable types that do not override :c:member:`~PyTypeObject.tp_call` now inherit the :c:macro:`Py_TPFLAGS_HAVE_VECTORCALL` flag. .. .. date: 2022-07-29-10-41-59 .. gh-issue: 95388 .. nonce: aiRSgr .. section: C API Creating :c:macro:`immutable types ` with mutable bases is deprecated and is planned to be disabled in Python 3.14. .. .. date: 2022-07-25-15-54-27 .. gh-issue: 92678 .. nonce: ziZpxz .. section: C API Adds unstable C-API functions ``_PyObject_VisitManagedDict`` and ``_PyObject_ClearManagedDict`` to allow C extensions to allow the VM to manage their object's dictionaries. .. .. date: 2022-07-19-22-37-40 .. gh-issue: 94936 .. nonce: LGlmKv .. section: C API Added :c:func:`PyCode_GetVarnames`, :c:func:`PyCode_GetCellvars` and :c:func:`PyCode_GetFreevars` for accessing ``co_varnames``, ``co_cellvars`` and ``co_freevars`` respectively via the C API. .. .. date: 2022-07-17-18-21-40 .. gh-issue: 94930 .. nonce: gPFGDL .. section: C API Fix ``SystemError`` raised when :c:func:`PyArg_ParseTupleAndKeywords` is used with ``#`` in ``(...)`` but without ``PY_SSIZE_T_CLEAN`` defined. .. .. date: 2022-07-12-17-39-32 .. gh-issue: 94731 .. nonce: 9CPJNU .. section: C API Python again uses C-style casts for most casting operations when compiled with C++. This may trigger compiler warnings, if they are enabled with e.g. ``-Wold-style-cast`` or ``-Wzero-as-null-pointer-constant`` options for ``g++``. .. .. date: 2022-06-17-13-41-38 .. gh-issue: 93937 .. nonce: uKVTEh .. section: C API The following frame functions and type are now directly available with ``#include ``, it's no longer needed to add ``#include ``: * :c:func:`PyFrame_Check` * :c:func:`PyFrame_GetBack` * :c:func:`PyFrame_GetBuiltins` * :c:func:`PyFrame_GetGenerator` * :c:func:`PyFrame_GetGlobals` * :c:func:`PyFrame_GetLasti` * :c:func:`PyFrame_GetLocals` * :c:type:`PyFrame_Type` Patch by Victor Stinner. .. .. date: 2022-06-13-21-37-31 .. gh-issue: 91321 .. nonce: DgJFvS .. section: C API Fix the compatibility of the Python C API with C++ older than C++11. Patch by Victor Stinner. .. .. date: 2022-06-10-23-41-48 .. gh-issue: 91731 .. nonce: fhYUQG .. section: C API Avoid defining the ``static_assert`` when compiling with C++ 11, where this is a keyword and redefining it can lead to undefined behavior. Patch by Pablo Galindo .. .. date: 2022-06-10-16-50-27 .. gh-issue: 89546 .. nonce: mX1f10 .. section: C API :c:func:`PyType_FromMetaclass` (and other ``PyType_From*`` functions) now check that offsets and the base class's :c:member:`~PyTypeObject.tp_basicsize` fit in the new class's ``tp_basicsize``. .. .. date: 2022-06-06-16-04-14 .. gh-issue: 93503 .. nonce: MHJTu8 .. section: C API Add two new public functions to the public C-API, :c:func:`PyEval_SetProfileAllThreads` and :c:func:`PyEval_SetTraceAllThreads`, that allow to set tracing and profiling functions in all running threads in addition to the calling one. Also, two analogous functions to the :mod:`threading` module (:func:`threading.setprofile_all_threads` and :func:`threading.settrace_all_threads`) that allow to do the same from Python. Patch by Pablo Galindo .. .. date: 2022-06-04-13-15-41 .. gh-issue: 93442 .. nonce: 4M4NDb .. section: C API Add C++ overloads for _Py_CAST_impl() to handle 0/NULL. This will allow C++ extensions that pass 0 or NULL to macros using _Py_CAST() to continue to compile. .. .. date: 2022-06-03-14-54-41 .. gh-issue: 93466 .. nonce: DDtH0X .. section: C API Slot IDs in PyType_Spec may not be repeated. The documentation was updated to mention this. For some cases of repeated slots, PyType_FromSpec and related functions will now raise an exception. .. .. date: 2022-05-23-15-22-18 .. gh-issue: 92898 .. nonce: Qjc9d3 .. section: C API Fix C++ compiler warnings when casting function arguments to ``PyObject*``. Patch by Serge Guelton. .. .. date: 2022-05-23-13-33-18 .. gh-issue: 93103 .. nonce: ooD3Eb .. section: C API Deprecate global configuration variables, like :c:var:`Py_IgnoreEnvironmentFlag`, in the documentation: the :c:func:`Py_InitializeFromConfig` API should be instead. Patch by Victor Stinner. .. .. date: 2022-05-23-12-31-04 .. gh-issue: 77782 .. nonce: ugC8dn .. section: C API Deprecate global configuration variable like :c:var:`Py_IgnoreEnvironmentFlag`: the :c:func:`Py_InitializeFromConfig` API should be instead. Patch by Victor Stinner. .. .. date: 2022-05-19-18-05-51 .. gh-issue: 92913 .. nonce: Ass1Hv .. section: C API Ensures changes to :c:member:`PyConfig.module_search_paths` are ignored unless :c:member:`PyConfig.module_search_paths_set` is set .. .. date: 2022-05-13-18-17-48 .. gh-issue: 92781 .. nonce: TVDr3- .. section: C API Avoid mixing declarations and code in the C API to fix the compiler warning: "ISO C90 forbids mixed declarations and code" [-Werror=declaration-after-statement]. Patch by Victor Stinner. .. .. date: 2022-05-11-02-33-10 .. gh-issue: 92651 .. nonce: FIXLf0 .. section: C API Remove the ``token.h`` header file. There was never any public tokenizer C API. The ``token.h`` header file was only designed to be used by Python internals. Patch by Victor Stinner. .. .. date: 2022-05-10-12-35-42 .. gh-issue: 92536 .. nonce: cAoRCZ .. section: C API Remove legacy Unicode APIs based on ``Py_UNICODE*``. .. .. date: 2022-05-09-23-16-38 .. gh-issue: 85858 .. nonce: VIcNDL .. section: C API Remove the ``PyUnicode_InternImmortal()`` function and the ``SSTATE_INTERNED_IMMORTAL`` macro. Patch by Victor Stinner. .. .. date: 2022-05-03-19-35-37 .. gh-issue: 92193 .. nonce: 61VoFL .. section: C API Add new function :c:func:`PyFunction_SetVectorcall` to the C API which sets the vectorcall field of a given :c:type:`PyFunctionObject`. Warning: extensions using this API must preserve the behavior of the unaltered function! .. .. date: 2022-04-13-16-10-55 .. gh-issue: 59121 .. nonce: -B7mKp .. section: C API Fixed an assert that prevented ``PyRun_InteractiveOne`` from providing tracebacks when parsing from the provided FD. .. .. bpo: 45383 .. date: 2021-10-05-21-59-43 .. nonce: TVClgf .. section: C API The :c:func:`PyType_FromSpec` API will now find and use a metaclass based on the provided bases. An error will be raised if there is a metaclass conflict.