On success, return ``0``.
On error, set an exception, leave the writer unchanged, and return ``-1``.
- .. versionadded:: next
+ .. versionadded:: 3.14
.. c:function:: int PyUnicodeWriter_WriteWideChar(PyUnicodeWriter *writer, const wchar_t *str, Py_ssize_t size)
.. versionchanged:: 3.10
The *strict* parameter was added.
- .. versionchanged:: next
+ .. versionchanged:: 3.14
The :py:data:`~os.path.ALLOW_MISSING` value for the *strict* parameter
was added.
Special value used for the *strict* argument in :func:`realpath`.
- .. versionadded:: next
+ .. versionadded:: 3.14
.. function:: relpath(path, start=os.curdir)
The exception that was raised to reject the replacement member is available
as :attr:`!BaseException.__context__`.
- .. versionadded:: next
+ .. versionadded:: 3.14
The following constants are available at the module level:
Note that this filter does not block *all* dangerous archive features.
See :ref:`tarfile-further-verification` for details.
- .. versionchanged:: next
+ .. versionchanged:: 3.14
Link targets are now normalized.
#define PY_MINOR_VERSION 14
#define PY_MICRO_VERSION 0
#define PY_RELEASE_LEVEL PY_RELEASE_LEVEL_BETA
-#define PY_RELEASE_SERIAL 2
+#define PY_RELEASE_SERIAL 3
/* Version as a string */
-#define PY_VERSION "3.14.0b2+"
+#define PY_VERSION "3.14.0b3"
/*--end constants--*/
-# Autogenerated by Sphinx on Mon May 26 16:26:41 2025
+# Autogenerated by Sphinx on Tue Jun 17 18:40:47 2025
# as part of the release process.
topics = {
sign: "+" | "-" | " "
width_and_precision: [width_with_grouping][precision_with_grouping]
width_with_grouping: [width][grouping]
- precision_with_grouping: "." [precision][grouping]
+ precision_with_grouping: "." [precision][grouping] | "." grouping
width: digit+
precision: digit+
grouping: "," | "_"
For performance reasons, the value of *errors* is not checked for
validity unless an encoding error actually occurs, Python
- Development Mode is enabled or a debug build is used.
+ Development Mode is enabled or a debug build is used. For example:
+
+ >>> encoded_str_to_bytes = 'Python'.encode()
+ >>> type(encoded_str_to_bytes)
+ <class 'bytes'>
+ >>> encoded_str_to_bytes
+ b'Python'
Changed in version 3.1: Added support for keyword arguments.
otherwise return "False". *suffix* can also be a tuple of suffixes
to look for. With optional *start*, test beginning at that
position. With optional *end*, stop comparing at that position.
+ Using *start* and *end* is equivalent to
+ "str[start:end].endswith(suffix)". For example:
+
+ >>> 'Python'.endswith('on')
+ True
+ >>> 'a tuple of suffixes'.endswith(('at', 'in'))
+ False
+ >>> 'a tuple of suffixes'.endswith(('at', 'es'))
+ True
+ >>> 'Python is amazing'.endswith('is', 0, 9)
+ True
+
+ See also "startswith()" and "removesuffix()".
str.expandtabs(tabsize=8)
("\n") or return ("\r"), it is copied and the current column is
reset to zero. Any other character is copied unchanged and the
current column is incremented by one regardless of how the
- character is represented when printed.
+ character is represented when printed. For example:
- >>> '01\t012\t0123\t01234'.expandtabs()
- '01 012 0123 01234'
- >>> '01\t012\t0123\t01234'.expandtabs(4)
- '01 012 0123 01234'
+ >>> '01\t012\t0123\t01234'.expandtabs()
+ '01 012 0123 01234'
+ >>> '01\t012\t0123\t01234'.expandtabs(4)
+ '01 012 0123 01234'
+ >>> print('01\t012\n0123\t01234'.expandtabs(4))
+ 01 012
+ 0123 01234
str.find(sub[, start[, end]])
String literals are described by the following lexical definitions:
stringliteral: [stringprefix](shortstring | longstring)
- stringprefix: "r" | "u" | "R" | "U" | "f" | "F"
+ stringprefix: "r" | "u" | "R" | "U" | "f" | "F" | "t" | "T"
| "fr" | "Fr" | "fR" | "FR" | "rf" | "rF" | "Rf" | "RF"
+ | "tr" | "Tr" | "tR" | "TR" | "rt" | "rT" | "Rt" | "RT"
shortstring: "'" shortstringitem* "'" | '"' shortstringitem* '"'
longstring: "\'\'\'" longstringitem* "\'\'\'" | '"""' longstringitem* '"""'
shortstringitem: shortstringchar | stringescapeseq
| | collected during class body execution. See also: |
| | "__annotations__ attributes". For best practices |
| | on working with "__annotations__", please see |
-| | "annotationlib". Where possible, use |
+| | "annotationlib". Use |
| | "annotationlib.get_annotations()" instead of |
-| | accessing this attribute directly. Changed in |
-| | version 3.14: Annotations are now lazily |
-| | evaluated. See **PEP 649**. |
+| | accessing this attribute directly. Warning: |
+| | Accessing the "__annotations__" attribute directly |
+| | on a class object may return annotations for the |
+| | wrong class, specifically in certain cases where |
+| | the class, its base class, or a metaclass is |
+| | defined under "from __future__ import |
+| | annotations". See **749** for details.This |
+| | attribute does not exist on certain builtin |
+| | classes. On user-defined classes without |
+| | "__annotations__", it is an empty dictionary. |
+| | Changed in version 3.14: Annotations are now |
+| | lazily evaluated. See **PEP 649**. |
+----------------------------------------------------+----------------------------------------------------+
| type.__annotate__() | The *annotate function* for this class, or "None" |
| | if the class has no annotations. See also: |
| "s * n" or "n * s" | equivalent to adding *s* to | (2)(7) |
| | itself *n* times | |
+----------------------------+----------------------------------+------------+
-| "s[i]" | *i*th item of *s*, origin 0 | (3) |
+| "s[i]" | *i*th item of *s*, origin 0 | (3)(9) |
+----------------------------+----------------------------------+------------+
| "s[i:j]" | slice of *s* from *i* to *j* | (3)(4) |
+----------------------------+----------------------------------+------------+
returned index being relative to the start of the sequence rather
than the start of the slice.
+9. An "IndexError" is raised if *i* is outside the sequence range.
+
Immutable Sequence Types
========================
| "s[i] = x" | item *i* of *s* is replaced by | |
| | *x* | |
+--------------------------------+----------------------------------+-----------------------+
+| "del s[i]" | removes item *i* of *s* | |
++--------------------------------+----------------------------------+-----------------------+
| "s[i:j] = t" | slice of *s* from *i* to *j* is | |
| | replaced by the contents of the | |
| | iterable *t* | |
| "s[i] = x" | item *i* of *s* is replaced by | |
| | *x* | |
+--------------------------------+----------------------------------+-----------------------+
+| "del s[i]" | removes item *i* of *s* | |
++--------------------------------+----------------------------------+-----------------------+
| "s[i:j] = t" | slice of *s* from *i* to *j* is | |
| | replaced by the contents of the | |
| | iterable *t* | |
--- /dev/null
+.. date: 2025-06-03-18-26-54
+.. gh-issue: 135099
+.. nonce: Q9usKm
+.. release date: 2025-06-17
+.. section: Windows
+
+Fix a crash that could occur on Windows when a background thread waits on a
+:c:type:`PyMutex` while the main thread is shutting down the interpreter.
+
+..
+
+.. date: 2025-06-17-08-48-08
+.. gh-issue: 132815
+.. nonce: CY1Esu
+.. section: Tests
+
+Fix test__opcode: add ``JUMP_BACKWARD`` to specialization stats.
+
+..
+
+.. date: 2025-06-14-13-20-17
+.. gh-issue: 135489
+.. nonce: Uh0yVO
+.. section: Tests
+
+Show verbose output for failing tests during PGO profiling step with
+--enable-optimizations.
+
+..
+
+.. date: 2025-06-04-13-07-44
+.. gh-issue: 135120
+.. nonce: NapnZT
+.. section: Tests
+
+Add :func:`!test.support.subTests`.
+
+..
+
+.. date: 2025-06-13-15-55-22
+.. gh-issue: 135462
+.. nonce: KBeJpc
+.. section: Security
+
+Fix quadratic complexity in processing specially crafted input in
+:class:`html.parser.HTMLParser`. End-of-file errors are now handled
+according to the HTML5 specs -- comments and declarations are automatically
+closed, tags are ignored.
+
+..
+
+.. date: 2025-06-02-11-32-23
+.. gh-issue: 135034
+.. nonce: RLGjbp
+.. section: Security
+
+Fixes multiple issues that allowed ``tarfile`` extraction filters
+(``filter="data"`` and ``filter="tar"``) to be bypassed using crafted
+symlinks and hard links.
+
+Addresses :cve:`2024-12718`, :cve:`2025-4138`, :cve:`2025-4330`, and
+:cve:`2025-4517`.
+
+..
+
+.. date: 2025-06-15-03-03-22
+.. gh-issue: 65697
+.. nonce: COdwZd
+.. section: Library
+
+:class:`configparser`'s error message when attempting to write an invalid
+key is now more helpful.
+
+..
+
+.. date: 2025-06-14-14-19-13
+.. gh-issue: 135497
+.. nonce: 1pzwdA
+.. section: Library
+
+Fix :func:`os.getlogin` failing for longer usernames on BSD-based platforms.
+
+..
+
+.. date: 2025-06-12-18-15-31
+.. gh-issue: 135429
+.. nonce: mch75_
+.. section: Library
+
+Fix the argument mismatch in ``_lsprof`` for ``PY_THROW`` event.
+
+..
+
+.. date: 2025-06-12-10-45-02
+.. gh-issue: 135368
+.. nonce: OjWVHL
+.. section: Library
+
+Fix :class:`unittest.mock.Mock` generation on :func:`dataclasses.dataclass`
+objects. Now all special attributes are set as it was before :gh:`124429`.
+
+..
+
+.. date: 2025-06-10-16-11-00
+.. gh-issue: 133967
+.. nonce: P0c24q
+.. section: Library
+
+Do not normalize :mod:`locale` name 'C.UTF-8' to 'en_US.UTF-8'.
+
+..
+
+.. date: 2025-06-10-00-42-30
+.. gh-issue: 135321
+.. nonce: UHh9jT
+.. section: Library
+
+Raise a correct exception for values greater than 0x7fffffff for the
+``BINSTRING`` opcode in the C implementation of :mod:`pickle`.
+
+..
+
+.. date: 2025-06-08-14-50-34
+.. gh-issue: 135276
+.. nonce: ZLUhV1
+.. section: Library
+
+Backported bugfixes in zipfile.Path from zipp 3.23. Fixed ``.name``,
+``.stem`` and other basename-based properties on Windows when working with a
+zipfile on disk.
+
+..
+
+.. date: 2025-06-08-10-22-22
+.. gh-issue: 135244
+.. nonce: Y2SOTJ
+.. section: Library
+
+:mod:`uuid`: when the MAC address cannot be determined, the 48-bit node ID
+is now generated with a cryptographically-secure pseudo-random number
+generator (CSPRNG) as per :rfc:`RFC 9562, §6.10.3 <9562#section-6.10-3>`.
+This affects :func:`~uuid.uuid1` and :func:`~uuid.uuid6`.
+
+..
+
+.. date: 2025-05-31-12-08-12
+.. gh-issue: 134970
+.. nonce: lgSaxq
+.. section: Library
+
+Fix the "unknown action" exception in
+:meth:`argparse.ArgumentParser.add_argument_group` to correctly replace the
+action class.
+
+..
+
+.. date: 2025-05-30-13-07-29
+.. gh-issue: 134718
+.. nonce: 9Qvhxn
+.. section: Library
+
+:func:`ast.dump` now only omits ``None`` and ``[]`` values if they are
+default values.
+
+..
+
+.. date: 2025-05-30-09-46-21
+.. gh-issue: 134939
+.. nonce: Pu3nnm
+.. section: Library
+
+Add the :mod:`concurrent.interpreters` module. See :pep:`734`.
+
+..
+
+.. date: 2025-05-29-06-53-40
+.. gh-issue: 134885
+.. nonce: -_L22o
+.. section: Library
+
+Fix possible crash in the :mod:`compression.zstd` module related to setting
+parameter types. Patch by Jelle Zijlstra.
+
+..
+
+.. date: 2025-05-28-20-49-29
+.. gh-issue: 134857
+.. nonce: dVYXVO
+.. section: Library
+
+Improve error report for :mod:`doctest`\ s run with :mod:`unittest`. Remove
+:mod:`!doctest` module frames from tracebacks and redundant newline
+character from a failure message.
+
+..
+
+.. date: 2025-05-28-15-53-27
+.. gh-issue: 128840
+.. nonce: Nur2pB
+.. section: Library
+
+Fix parsing long IPv6 addresses with embedded IPv4 address.
+
+..
+
+.. date: 2025-05-26-17-06-40
+.. gh-issue: 134637
+.. nonce: 9-3zRL
+.. section: Library
+
+Fix performance regression in calling a :mod:`ctypes` function pointer in
+:term:`free threading`.
+
+..
+
+.. date: 2025-05-26-14-04-39
+.. gh-issue: 134696
+.. nonce: P04xUa
+.. section: Library
+
+Built-in HACL* and OpenSSL implementations of hash function constructors now
+correctly accept the same *documented* named arguments. For instance,
+:func:`~hashlib.md5` could be previously invoked as ``md5(data=data)`` or
+``md5(string=string)`` depending on the underlying implementation but these
+calls were not compatible. Patch by Bénédikt Tran.
+
+..
+
+.. date: 2025-05-25-23-23-05
+.. gh-issue: 134151
+.. nonce: 13Wwsb
+.. section: Library
+
+:mod:`email`: Fix :exc:`TypeError` in :func:`email.utils.decode_params` when
+sorting :rfc:`2231` continuations that contain an unnumbered section.
+
+..
+
+.. date: 2025-05-24-13-10-35
+.. gh-issue: 134210
+.. nonce: 0IuMY2
+.. section: Library
+
+:func:`curses.window.getch` now correctly handles signals. Patch by Bénédikt
+Tran.
+
+..
+
+.. date: 2025-05-18-23-46-21
+.. gh-issue: 134152
+.. nonce: 30HwbX
+.. section: Library
+
+:mod:`email`: Fix parsing of email message ID with invalid domain.
+
+..
+
+.. date: 2025-05-08-13-43-19
+.. gh-issue: 133489
+.. nonce: 9eGS1Z
+.. section: Library
+
+:func:`random.getrandbits` can now generate more that 2\ :sup:`31` bits.
+:func:`random.randbytes` can now generate more that 256 MiB.
+
+..
+
+.. date: 2025-05-01-10-56-44
+.. gh-issue: 132813
+.. nonce: rKurvp
+.. section: Library
+
+Improve error messages for incorrect types and values of
+:class:`csv.Dialect` attributes.
+
+..
+
+.. date: 2025-04-30-19-32-18
+.. gh-issue: 132969
+.. nonce: EagQ3G
+.. section: Library
+
+Prevent the :class:`~concurrent.futures.ProcessPoolExecutor` executor
+thread, which remains running when :meth:`shutdown(wait=False)
+<concurrent.futures.Executor.shutdown>`, from attempting to adjust the
+pool's worker processes after the object state has already been reset during
+shutdown. A combination of conditions, including a worker process having
+terminated abormally, resulted in an exception and a potential hang when the
+still-running executor thread attempted to replace dead workers within the
+pool.
+
+..
+
+.. date: 2025-04-21-01-03-15
+.. gh-issue: 127081
+.. nonce: WXRliX
+.. section: Library
+
+Fix libc thread safety issues with :mod:`os` by replacing ``getlogin`` with
+``getlogin_r`` re-entrant version.
+
+..
+
+.. date: 2025-04-07-06-41-54
+.. gh-issue: 131884
+.. nonce: ym9BJN
+.. section: Library
+
+Fix formatting issues in :func:`json.dump` when both *indent* and *skipkeys*
+are used.
+
+..
+
+.. date: 2025-03-09-03-13-41
+.. gh-issue: 130999
+.. nonce: tBRBVB
+.. section: Library
+
+Avoid exiting the new REPL and offer suggestions even if there are
+non-string candidates when errors occur.
+
+..
+
+.. date: 2025-06-10-17-02-06
+.. gh-issue: 135171
+.. nonce: quHvts
+.. section: Documentation
+
+Document that the :term:`iterator` for the leftmost :keyword:`!for` clause
+in the generator expression is created immediately.
+
+..
+
+.. bpo: 45210
+.. date: 2021-09-15-13-07-25
+.. nonce: RtGk7i
+.. section: Documentation
+
+Document that error indicator may be set in tp_dealloc, and how to avoid
+clobbering it.
+
+..
+
+.. date: 2025-06-14-01-01-14
+.. gh-issue: 135496
+.. nonce: ER0Me3
+.. section: Core and Builtins
+
+Fix typo in the f-string conversion type error ("exclamanation" ->
+"exclamation").
+
+..
+
+.. date: 2025-06-12-18-12-42
+.. gh-issue: 135371
+.. nonce: R_YUtR
+.. section: Core and Builtins
+
+Fixed :mod:`asyncio` debugging tools to properly display internal coroutine
+call stacks alongside external task dependencies. The ``python -m asyncio
+ps`` and ``python -m asyncio pstree`` commands now show complete execution
+context. Patch by Pablo Galindo.
+
+..
+
+.. date: 2025-06-11-15-08-10
+.. gh-issue: 127319
+.. nonce: OVGFSZ
+.. section: Core and Builtins
+
+Set the ``allow_reuse_port`` class variable to ``False`` on the XMLRPC,
+logging, and HTTP servers. This matches the behavior in prior Python
+releases, which is to not allow port reuse.
+
+..
+
+.. date: 2025-06-10-17-37-11
+.. gh-issue: 135171
+.. nonce: P9UDfS
+.. section: Core and Builtins
+
+Reverts the behavior of async generator expressions when created with object
+w/o __aiter__ method to the pre-3.13 behavior of raising a TypeError.
+
+..
+
+.. date: 2025-06-09-23-57-37
+.. gh-issue: 130077
+.. nonce: MHknDB
+.. section: Core and Builtins
+
+Properly raise custom syntax errors when incorrect syntax containing names
+that are prefixes of soft keywords is encountered. Patch by Pablo Galindo.
+
+..
+
+.. date: 2025-06-06-18-57-30
+.. gh-issue: 135171
+.. nonce: 0YtLq6
+.. section: Core and Builtins
+
+Reverts the behavior of generator expressions when created with a
+non-iterable to the pre-3.13 behavior of raising a TypeError. It is no
+longer possible to cause a crash in the debugger by altering the generator
+expression's local variables. This is achieved by moving the ``GET_ITER``
+instruction back to the creation of the generator expression and adding an
+additional check to ``FOR_ITER``.
+
+..
+
+.. date: 2025-06-02-13-57-40
+.. gh-issue: 116738
+.. nonce: ycJsL8
+.. section: Core and Builtins
+
+Make methods in :mod:`heapq` thread-safe on the :term:`free threaded <free
+threading>` build.
+
+..
+
+.. date: 2025-05-31-10-26-46
+.. gh-issue: 134876
+.. nonce: 8mBGJI
+.. section: Core and Builtins
+
+Add support to :pep:`768` remote debugging for Linux kernels which don't
+have CONFIG_CROSS_MEMORY_ATTACH configured.
+
+..
+
+.. date: 2025-05-30-18-09-54
+.. gh-issue: 134889
+.. nonce: Ic9UM-
+.. section: Core and Builtins
+
+Fix handling of a few opcodes that leave operands on the stack when
+optimizing ``LOAD_FAST``.
+
+..
+
+.. date: 2025-05-30-15-56-19
+.. gh-issue: 134908
+.. nonce: 3a7PxM
+.. section: Core and Builtins
+
+Fix crash when iterating over lines in a text file on the :term:`free
+threaded <free threading>` build.
+
+..
+
+.. date: 2025-05-27-20-29-00
+.. gh-issue: 132617
+.. nonce: EmUfQQ
+.. section: Core and Builtins
+
+Fix :meth:`dict.update` modification check that could incorrectly raise a
+"dict mutated during update" error when a different dictionary was modified
+that happens to share the same underlying keys object.
+
+..
+
+.. date: 2025-05-27-18-59-54
+.. gh-issue: 134679
+.. nonce: FWPBu6
+.. section: Core and Builtins
+
+Fix crash in the :term:`free threading` build's QSBR code that could occur
+when changing an object's ``__dict__`` attribute.
+
+..
+
+.. date: 2025-05-27-09-19-21
+.. gh-issue: 127682
+.. nonce: 9WwFrM
+.. section: Core and Builtins
+
+No longer call ``__iter__`` twice in list comprehensions. This brings the
+behavior of list comprehensions in line with other forms of iteration
+
+..
+
+.. date: 2025-05-26-15-55-50
+.. gh-issue: 133912
+.. nonce: -xAguL
+.. section: Core and Builtins
+
+Fix the C API function ``PyObject_GenericSetDict`` to handle extension
+classes with inline values.
+
+..
+
+.. date: 2025-06-05-11-06-07
+.. gh-issue: 134989
+.. nonce: 74p4ud
+.. section: C API
+
+Fix ``Py_RETURN_NONE``, ``Py_RETURN_TRUE`` and ``Py_RETURN_FALSE`` macros in
+the limited C API 3.11 and older: don't treat ``Py_None``, ``Py_True`` and
+``Py_False`` as immortal. Patch by Victor Stinner.
+
+..
+
+.. date: 2025-06-02-13-19-22
+.. gh-issue: 134989
+.. nonce: sDDyBN
+.. section: C API
+
+Implement :c:func:`PyObject_DelAttr` and :c:func:`PyObject_DelAttrString` as
+macros in the limited C API 3.12 and older. Patch by Victor Stinner.
+
+..
+
+.. date: 2025-05-13-16-06-46
+.. gh-issue: 133968
+.. nonce: 6alWst
+.. section: C API
+
+Add :c:func:`PyUnicodeWriter_WriteASCII` function to write an ASCII string
+into a :c:type:`PyUnicodeWriter`. The function is faster than
+:c:func:`PyUnicodeWriter_WriteUTF8`, but has an undefined behavior if the
+input string contains non-ASCII characters. Patch by Victor Stinner.
+
+..
+
+.. date: 2025-06-16-07-20-28
+.. gh-issue: 119132
+.. nonce: fcI8s7
+.. section: Build
+
+Remove "experimental" tag from the CPython free-threading build.
+
+..
+
+.. date: 2025-06-14-10-32-11
+.. gh-issue: 135497
+.. nonce: ajlV4F
+.. section: Build
+
+Fix the detection of ``MAXLOGNAME`` in the ``configure.ac`` script.
+
+..
+
+.. date: 2025-05-30-11-02-30
+.. gh-issue: 134923
+.. nonce: gBkRg4
+.. section: Build
+
+Windows builds with profile-guided optimization enabled now use
+``/GENPROFILE`` and ``/USEPROFILE`` instead of deprecated ``/LTCG:``
+options.
+
+..
+
+.. date: 2025-05-27-17-04-20
+.. gh-issue: 134774
+.. nonce: CusyjW
+.. section: Build
+
+Fix :c:macro:`Py_DEBUG` macro redefinition warnings on Windows debug builds.
+Patch by Chris Eibl.
+
+..
+
+.. date: 2025-05-24-16-59-20
+.. gh-issue: 134632
+.. nonce: i0W2hc
+.. section: Build
+
+Fixed ``build-details.json`` generation to use ``INCLUDEPY``, in order to
+reference the ``pythonX.Y`` subdirectory of the include directory, as
+required in :pep:`739`, instead of the top-level include directory.
+++ /dev/null
-Fixed ``build-details.json`` generation to use ``INCLUDEPY``, in order to
-reference the ``pythonX.Y`` subdirectory of the include directory, as
-required in :pep:`739`, instead of the top-level include directory.
+++ /dev/null
-Fix :c:macro:`Py_DEBUG` macro redefinition warnings on Windows debug builds.
-Patch by Chris Eibl.
+++ /dev/null
-Windows builds with profile-guided optimization enabled now use
-``/GENPROFILE`` and ``/USEPROFILE`` instead of deprecated ``/LTCG:``
-options.
+++ /dev/null
-Fix the detection of ``MAXLOGNAME`` in the ``configure.ac`` script.
+++ /dev/null
-Remove "experimental" tag from the CPython free-threading build.
+++ /dev/null
-Add :c:func:`PyUnicodeWriter_WriteASCII` function to write an ASCII string
-into a :c:type:`PyUnicodeWriter`. The function is faster than
-:c:func:`PyUnicodeWriter_WriteUTF8`, but has an undefined behavior if the
-input string contains non-ASCII characters. Patch by Victor Stinner.
+++ /dev/null
-Implement :c:func:`PyObject_DelAttr` and :c:func:`PyObject_DelAttrString` as
-macros in the limited C API 3.12 and older. Patch by Victor Stinner.
+++ /dev/null
-Fix ``Py_RETURN_NONE``, ``Py_RETURN_TRUE`` and ``Py_RETURN_FALSE`` macros in
-the limited C API 3.11 and older: don't treat ``Py_None``, ``Py_True`` and
-``Py_False`` as immortal. Patch by Victor Stinner.
+++ /dev/null
-Fix the C API function ``PyObject_GenericSetDict`` to handle extension
-classes with inline values.
+++ /dev/null
-No longer call ``__iter__`` twice in list comprehensions. This brings the
-behavior of list comprehensions in line with other forms of iteration
+++ /dev/null
-Fix crash in the :term:`free threading` build's QSBR code that could occur
-when changing an object's ``__dict__`` attribute.
+++ /dev/null
-Fix :meth:`dict.update` modification check that could incorrectly raise a
-"dict mutated during update" error when a different dictionary was modified
-that happens to share the same underlying keys object.
+++ /dev/null
-Fix crash when iterating over lines in a text file on the :term:`free threaded <free threading>` build.
+++ /dev/null
-Fix handling of a few opcodes that leave operands on the stack when
-optimizing ``LOAD_FAST``.
+++ /dev/null
-Add support to :pep:`768` remote debugging for Linux kernels which don't
-have CONFIG_CROSS_MEMORY_ATTACH configured.
+++ /dev/null
-Make methods in :mod:`heapq` thread-safe on the :term:`free threaded <free threading>` build.
+++ /dev/null
-Reverts the behavior of generator expressions when created with a
-non-iterable to the pre-3.13 behavior of raising a TypeError. It is no
-longer possible to cause a crash in the debugger by altering the generator
-expression's local variables. This is achieved by moving the ``GET_ITER``
-instruction back to the creation of the generator expression and adding an
-additional check to ``FOR_ITER``.
+++ /dev/null
-Properly raise custom syntax errors when incorrect syntax containing names
-that are prefixes of soft keywords is encountered. Patch by Pablo Galindo.
+++ /dev/null
-Reverts the behavior of async generator expressions when created with object
-w/o __aiter__ method to the pre-3.13 behavior of raising a TypeError.
+++ /dev/null
-Set the ``allow_reuse_port`` class variable to ``False`` on the XMLRPC,
-logging, and HTTP servers. This matches the behavior in prior Python
-releases, which is to not allow port reuse.
+++ /dev/null
-Fixed :mod:`asyncio` debugging tools to properly display internal coroutine
-call stacks alongside external task dependencies. The ``python -m asyncio
-ps`` and ``python -m asyncio pstree`` commands now show complete execution
-context. Patch by Pablo Galindo.
+++ /dev/null
-Fix typo in the f-string conversion type error ("exclamanation" -> "exclamation").
+++ /dev/null
-Document that error indicator may be set in tp_dealloc, and how to avoid
-clobbering it.
+++ /dev/null
-Document that the :term:`iterator` for the leftmost :keyword:`!for` clause
-in the generator expression is created immediately.
+++ /dev/null
-Avoid exiting the new REPL and offer suggestions even if there are non-string
-candidates when errors occur.
+++ /dev/null
-Fix formatting issues in :func:`json.dump` when both *indent* and *skipkeys* are used.
+++ /dev/null
-Fix libc thread safety issues with :mod:`os` by replacing ``getlogin`` with
-``getlogin_r`` re-entrant version.
+++ /dev/null
-Prevent the :class:`~concurrent.futures.ProcessPoolExecutor` executor thread,
-which remains running when :meth:`shutdown(wait=False)
-<concurrent.futures.Executor.shutdown>`, from
-attempting to adjust the pool's worker processes after the object state has already been reset during shutdown.
-A combination of conditions, including a worker process having terminated abormally,
-resulted in an exception and a potential hang when the still-running executor thread
-attempted to replace dead workers within the pool.
+++ /dev/null
-Improve error messages for incorrect types and values of :class:`csv.Dialect`
-attributes.
+++ /dev/null
-:func:`random.getrandbits` can now generate more that 2\ :sup:`31` bits.
-:func:`random.randbytes` can now generate more that 256 MiB.
+++ /dev/null
-:mod:`email`: Fix parsing of email message ID with invalid domain.
+++ /dev/null
-:func:`curses.window.getch` now correctly handles signals. Patch by Bénédikt
-Tran.
+++ /dev/null
-:mod:`email`: Fix :exc:`TypeError` in :func:`email.utils.decode_params`
-when sorting :rfc:`2231` continuations that contain an unnumbered section.
+++ /dev/null
-Built-in HACL* and OpenSSL implementations of hash function constructors
-now correctly accept the same *documented* named arguments. For instance,
-:func:`~hashlib.md5` could be previously invoked as ``md5(data=data)``
-or ``md5(string=string)`` depending on the underlying implementation
-but these calls were not compatible. Patch by Bénédikt Tran.
+++ /dev/null
-Fix performance regression in calling a :mod:`ctypes` function pointer in :term:`free threading`.
+++ /dev/null
-Fix parsing long IPv6 addresses with embedded IPv4 address.
+++ /dev/null
-Improve error report for :mod:`doctest`\ s run with :mod:`unittest`. Remove
-:mod:`!doctest` module frames from tracebacks and redundant newline
-character from a failure message.
+++ /dev/null
-Fix possible crash in the :mod:`compression.zstd` module related to setting
-parameter types. Patch by Jelle Zijlstra.
+++ /dev/null
-Add the :mod:`concurrent.interpreters` module. See :pep:`734`.
+++ /dev/null
-:func:`ast.dump` now only omits ``None`` and ``[]`` values if they are
-default values.
+++ /dev/null
-Fix the "unknown action" exception in
-:meth:`argparse.ArgumentParser.add_argument_group` to correctly replace the
-action class.
+++ /dev/null
-:mod:`uuid`: when the MAC address cannot be determined, the 48-bit node\r
-ID is now generated with a cryptographically-secure pseudo-random number\r
-generator (CSPRNG) as per :rfc:`RFC 9562, §6.10.3 <9562#section-6.10-3>`.\r
-This affects :func:`~uuid.uuid1` and :func:`~uuid.uuid6`.\r
+++ /dev/null
-Backported bugfixes in zipfile.Path from zipp 3.23. Fixed
-``.name``, ``.stem`` and other basename-based properties on Windows when
-working with a zipfile on disk.
+++ /dev/null
-Raise a correct exception for values greater than 0x7fffffff for the ``BINSTRING`` opcode in the C implementation of :mod:`pickle`.
+++ /dev/null
-Do not normalize :mod:`locale` name 'C.UTF-8' to 'en_US.UTF-8'.
+++ /dev/null
-Fix :class:`unittest.mock.Mock` generation on :func:`dataclasses.dataclass`
-objects. Now all special attributes are set as it was before :gh:`124429`.
+++ /dev/null
-Fix the argument mismatch in ``_lsprof`` for ``PY_THROW`` event.
+++ /dev/null
-Fix :func:`os.getlogin` failing for longer usernames on BSD-based platforms.
+++ /dev/null
-:class:`configparser`'s error message when attempting to write an invalid key is now more helpful.
+++ /dev/null
-Fixes multiple issues that allowed ``tarfile`` extraction filters
-(``filter="data"`` and ``filter="tar"``) to be bypassed using crafted
-symlinks and hard links.
-
-Addresses :cve:`2024-12718`, :cve:`2025-4138`, :cve:`2025-4330`, and :cve:`2025-4517`.
-
+++ /dev/null
-Fix quadratic complexity in processing specially crafted input in
-:class:`html.parser.HTMLParser`. End-of-file errors are now handled according
-to the HTML5 specs -- comments and declarations are automatically closed,
-tags are ignored.
+++ /dev/null
-Add :func:`!test.support.subTests`.
+++ /dev/null
-Show verbose output for failing tests during PGO profiling step with --enable-optimizations.
+++ /dev/null
-Fix test__opcode: add ``JUMP_BACKWARD`` to specialization stats.
+++ /dev/null
-Fix a crash that could occur on Windows when a background thread waits on a
-:c:type:`PyMutex` while the main thread is shutting down the interpreter.
-This is Python version 3.14.0 beta 2
+This is Python version 3.14.0 beta 3
====================================
.. image:: https://github.com/python/cpython/actions/workflows/build.yml/badge.svg?branch=main&event=push
projects / thirdparty / Python / cpython.git / commitdiff
