3.12.0b1 - Cpython — ContextQMD

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Improve the performance of :c:func:PyObject_HasAttrString

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Change the error range for invalid bytes literals.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Implement :pep:669 Low Impact Monitoring for CPython.

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

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

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

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

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

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

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

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

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

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

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

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

.. bpo: 31821 .. date: 2019-12-01-12-58-31 .. nonce: 1FNmwk .. section: Library

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Update datetime deprecations' stracktrace to point to the calling line

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Remove unneeded comments and code in turtle.py.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Improve import time of :mod:platform module.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Update the bundled copy of pip to version 23.1.2.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Add convenience variable feature to :mod:pdb

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

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

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

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

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

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

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

Added Enum for months and days in the calendar module.

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

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

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

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

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

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

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

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

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

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

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

Update the bundled copy of pip to version 23.1.1.

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

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

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

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

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

Update :mod:!cProfile to use PEP 669 API

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

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

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

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

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

Set default Flag boundary to STRICT and fix bitwise operations.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Support sys.last_exc in :mod:idlelib.

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

Improve performance of :func:ast.get_source_segment.

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

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

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

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

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

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

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

Remove deprecation of enum member.member access.

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

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

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

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

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

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

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

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

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

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

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

Fix various Windows-specific issues with shutil.which.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Deprecate :class:collections.abc.ByteString

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Remove the long-deprecated imp module.

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

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

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

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

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

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

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

Fix potential deadlock in pty.spawn()

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

Support divert(4) added in FreeBSD 14.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

fix use of poll in test_epoll's test_control_and_wait

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

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

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

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

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

PYTHON_FOR_REGEN now require Python 3.10 or newer.

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

Define .PHONY / virtual make targets consistently and properly.

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

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

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

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

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

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

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

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

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

Add platform triplets for 64-bit LoongArch:

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

Patch by Zhang Na.

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

Update Windows installer to use SQLite 3.42.0.

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

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

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

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

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

Fixes venvs not working in bash on Windows across different disks

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

Update Windows installer to use SQLite 3.41.2.

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

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

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

Update macOS installer to Tcl/Tk 8.6.13.

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

Update macOS installer to SQLite 3.42.0.

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

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

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

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

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

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

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

Update macOS installer to SQLite 3.41.2.

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

Fix completions for Tk Aqua 8.7 (currently blank).

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

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

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

Fix IDLE test hang on macOS.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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