- Update to 3.14.0~rc2:
- Library
- gh-137426: Remove the code deprecation of
importlib.abc.ResourceLoader. It is documented as
deprecated, but left for backwards compatibility with other
classes in importlib.abc.
- gh-137282: Fix tab completion and dir() on
concurrent.futures.
- gh-137257: Bump the version of pip bundled in ensurepip to
version 25.2
- gh-137226: Fix behavior of
annotationlib.ForwardRef.evaluate() when the type_params
parameter is passed and the name of a type param is also
present in an enclosing scope.
- gh-130522: Fix unraisable TypeError raised during
interpreter shutdown in the threading module.
- gh-137059: Fix handling of file URLs with a
Windows drive letter in the URL authority by
urllib.request.url2pathname(). This fixes a regression in
earlier pre-releases of Python 3.14.
- gh-130577: tarfile now validates archives to ensure member
offsets are non-negative. (Contributed by Alexander Enrique
Urieles Nieto in gh-130577; CVE-2025-8194, bsc#1247249).
- gh-135228: When dataclasses replaces a class with a slotted
dataclass, the original class can now be garbage collected
again. Earlier changes in Python 3.14 caused this class to
always remain in existence together with the replacement
class synthesized by dataclasses.
- Documentation
- gh-136155: We are now checking for fatal errors in EPUB
builds in CI.
- Core and Builtins
- gh-137400: Fix a crash in the free threading
build when disabling profiling or tracing across
all threads with PyEval_SetProfileAllThreads()
or PyEval_SetTraceAllThreads() or their Python
equivalents threading.settrace_all_threads() and
threading.setprofile_all_threads().
- gh-137314: Fixed a regression where raw f-strings
incorrectly interpreted escape sequences in format
specifications. Raw f-strings now properly preserve literal
backslashes in format specs, matching the behavior from
Python 3.11. For example, rf"{obj:\xFF}" now correctly
produces '\\xFF' instead of 'ÿ'. Patch by Pablo Galindo.
- gh-137308: A standalone docstring in a node body is
optimized as a pass statement to ensure that the node’s
body is never empty. There was a ValueError in compile()
otherwise.
- gh-137288: Fix bug where some bytecode instructions of a
boolean expression are not associated with the correct
exception handler.
- gh-134291: Remove some newer macOS API usage from the JIT
compiler in order to restore compatibility with older OSX
10.15 deployment targets.
- gh-131338: Disable computed stack limit checks on non-glibc
linux platforms to fix crashes on deep recursion.
- gh-136870: Fix data races while de-instrumenting bytecode
of code objects running concurrently in threads.
- C API
- gh-137573: Mark _PyOptimizer_Optimize as Py_NO_INLINE to
prevent stack overflow crashes on macOS.
- Build
- gh-132339: Add support for OpenSSL 3.5.
- Replaces upstreamed patches:
- CVE-2025-8194-tarfile-no-neg-offsets.patch
OBS-URL: https://build.opensuse.org/request/show/1299840
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python314?expand=0&rev=21
- Library
- gh-137426: Remove the code deprecation of
importlib.abc.ResourceLoader. It is documented as
deprecated, but left for backwards compatibility with other
classes in importlib.abc.
- gh-137282: Fix tab completion and dir() on
concurrent.futures.
- gh-137257: Bump the version of pip bundled in ensurepip to
version 25.2
- gh-137226: Fix behavior of
annotationlib.ForwardRef.evaluate() when the type_params
parameter is passed and the name of a type param is also
present in an enclosing scope.
- gh-130522: Fix unraisable TypeError raised during
interpreter shutdown in the threading module.
- gh-137059: Fix handling of file URLs with a
Windows drive letter in the URL authority by
urllib.request.url2pathname(). This fixes a regression in
earlier pre-releases of Python 3.14.
- gh-130577: tarfile now validates archives to ensure member
offsets are non-negative. (Contributed by Alexander Enrique
Urieles Nieto in gh-130577; CVE-2025-8194, bsc#1247249).
- gh-135228: When dataclasses replaces a class with a slotted
dataclass, the original class can now be garbage collected
again. Earlier changes in Python 3.14 caused this class to
always remain in existence together with the replacement
class synthesized by dataclasses.
- Documentation
- gh-136155: We are now checking for fatal errors in EPUB
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python314?expand=0&rev=91
- Update to 3.14.0~rc1:
- Tools/Demos
- gh-136251: Fixes and usability improvements for
Tools/wasm/emscripten/web_example
- Security
- gh-135661: Fix parsing attributes with whitespaces around
the = separator in html.parser.HTMLParser according to the
HTML5 standard.
- gh-118350: Fix support of escapable raw text mode (elements
“textarea” and “title”) in html.parser.HTMLParser.
- Library
- gh-136170: Removed the unreleased
zipfile.ZipFile.data_offset property added in 3.14.0a7 as
it wasn’t fully clear which behavior it should have in some
situations so the result was not always what a user might
expect.
- gh-124621: pyrepl now works in Emscripten.
- gh-136874: Discard URL query and fragment in
urllib.request.url2pathname().
- gh-130645: Enable color help by default in argparse.
- gh-136549: Fix signature of threading.excepthook().
- gh-136523: Fix wave.Wave_write emitting an unraisable when
open raises.
- gh-52876: Add missing keepends (default True)
parameter to codecs.StreamReaderWriter.readline() and
codecs.StreamReaderWriter.readlines().
- gh-136470: Correct
concurrent.futures.InterpreterPoolExecutor’s default thread
name.
- gh-136476: Fix a bug that was causing the
get_async_stack_trace function to miss some frames in the
stack trace.
- gh-136434: Fix docs generation of UnboundItem in
concurrent.interpreters when running with -OO.
- gh-136380: Raises AttributeError when accessing
concurrent.futures.InterpreterPoolExecutor and
subinterpreters are not available.
- gh-134759: Fix UnboundLocalError in
email.message.Message.get_payload() when the payload to
decode is a bytes object. Patch by Kliment Lamonov.
- gh-134657: asyncio: Remove some private names from
asyncio.__all__.
- Core and Builtins
- gh-136801: Fix PyREPL syntax highlighting on match cases
after multi-line case. Contributed by Olga Matoula.
- gh-136421: Fix crash when initializing datetime
concurrently.
- gh-136541: Fix some issues with the perf trampolines
on x86-64 and aarch64. The trampolines were not being
generated correctly for some cases, which could lead to
the perf integration not working correctly. Patch by Pablo
Galindo.
- gh-136517: Fixed a typo that prevented printing of
uncollectable objects when the gc.DEBUG_UNCOLLECTABLE mode
was set.
- gh-136525: Fix issue where per-thread bytecode was not
instrumented for newly created threads.
- gh-132661: Interpolation.expression now has a default, the
empty string.
- gh-132661: Reflect recent PEP 750 change.
- Disallow concatenation of string.templatelib.Template and
str. Also, disallow implicit concatenation of t-string
literals with string or f-string literals.
- gh-116738: Make functions in grp thread-safe on the free
threaded build.
- gh-135148: Fixed a bug where f-string debug expressions
(using =) would incorrectly strip out parts of strings
containing escaped quotes and # characters. Patch by Pablo
Galindo.
- gh-133136: Limit excess memory usage in the free threading
build when a large dictionary or list is resized and
accessed by multiple threads.
- gh-91153: Fix a crash when a bytearray is concurrently
mutated during item assignment.
- gh-127971: Fix off-by-one read beyond the end of a string
in string search.
- C API
- gh-112068: Revert support of nullable arguments in
PyArg_Parse().
- gh-133296: New variants for the critical section API that
accept one or two PyMutex pointers rather than PyObject
instances are now public in the non-limited C API.
- gh-134009: Expose PyMutex_IsLocked() as part of the public
C API.
- Build
- gh-135621: PyREPL no longer depends on the curses standard
library. Contributed by Łukasz Langa.
OBS-URL: https://build.opensuse.org/request/show/1295248
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python314?expand=0&rev=19
- Tools/Demos
- gh-136251: Fixes and usability improvements for
Tools/wasm/emscripten/web_example
- Security
- gh-135661: Fix parsing attributes with whitespaces around
the = separator in html.parser.HTMLParser according to the
HTML5 standard.
- gh-118350: Fix support of escapable raw text mode (elements
“textarea” and “title”) in html.parser.HTMLParser.
- Library
- gh-136170: Removed the unreleased
zipfile.ZipFile.data_offset property added in 3.14.0a7 as
it wasn’t fully clear which behavior it should have in some
situations so the result was not always what a user might
expect.
- gh-124621: pyrepl now works in Emscripten.
- gh-136874: Discard URL query and fragment in
urllib.request.url2pathname().
- gh-130645: Enable color help by default in argparse.
- gh-136549: Fix signature of threading.excepthook().
- gh-136523: Fix wave.Wave_write emitting an unraisable when
open raises.
- gh-52876: Add missing keepends (default True)
parameter to codecs.StreamReaderWriter.readline() and
codecs.StreamReaderWriter.readlines().
- gh-136470: Correct
concurrent.futures.InterpreterPoolExecutor’s default thread
name.
- gh-136476: Fix a bug that was causing the
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python314?expand=0&rev=86
- Update to 3.14.0~b4:
- Tools/Demos
- gh-135968: Stubs for strip are now provided as part of an
iOS install.
- gh-133600: Backport file reorganization for .
Tools/wasm/wasi This should make backporting future code .
changes easier. It also simplifies instructions around how.
to do WASI builds in the devguide .
- Tests
- gh-135966: The iOS testbed now handles the app_packages
folder as a site directory.
- gh-135494: Fix regrtest to support excluding tests from
--pgo tests. Patch by Victor Stinner.
- Security
- gh-136053: marshal: fix a possible crash when deserializing
slice objects.
- gh-135661: Fix parsing start and end tags in
html.parser.HTMLParser according to the HTML5 standard.
- Whitespaces no longer accepted between </ and the tag
name. E.g. </ script> does not end the script section.
- Vertical tabulation (\v) and non-ASCII whitespaces no
longer recognized as whitespaces. The only whitespaces
are \t\n\r\f and space.
- Null character (U+0000) no longer ends the tag name.
- Attributes and slashes after the tag name in end tags are
now ignored, instead of terminating after the first > in
quoted attribute value. E.g. </script/foo=">"/>.
- Multiple slashes and whitespaces between the last
attribute and closing > are now ignored in both start and
end tags. E.g. <a foo=bar/ //>.
- Multiple = between attribute name and value are no longer
collapsed. E.g. <a foo==bar> produces attribute “foo”
with value “=bar”.
- Whitespaces between the = separator and attribute name or
value are no longer ignored. E.g. <a foo =bar> produces
two attributes “foo” and “=bar”, both with value None; <a
foo= bar> produces two attributes: “foo” with value “”
and “bar” with value None.
- gh-102555: Fix comment parsing in html.parser.HTMLParser
according to the HTML5 standard. --!> now ends the comment.
-- > no longer ends the comment. Support abnormally ended
empty comments <--> and <--->.
- Library
- gh-136286: Fix pickling failures for protocols 0 and 1 for
many objects realted to subinterpreters.
- gh-136316: Improve support for evaluating nested forward
references in typing.evaluate_forward_ref().
- gh-85702: If zoneinfo._common.load_tzdata is given a
package without a resource a zoneinfo.ZoneInfoNotFoundError
is raised rather than a PermissionError. Patch by Victor
Stinner.
- gh-136028: Fix parsing month names containing “İ”
(U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE) in
time.strptime(). This affects locales az_AZ, ber_DZ, ber_MA
and crh_UA.
- gh-135995: In the palmos encoding, make byte 0x9b decode to
› (U+203A - SINGLE RIGHT-POINTING ANGLE QUOTATION MARK).
- gh-53203: Fix time.strptime() for %c and %x formats on
locales byn_ER, wal_ET and lzh_TW, and for %X format on
locales ar_SA, bg_BG and lzh_TW.
- gh-91555: An earlier change, which was introduced in
3.14.0b2, has been reverted. It disabled logging for
a logger during handling of log messages for that
logger. Since the reversion, the behaviour should be as it
was before 3.14.0b2.
- gh-135878: Fixes a crash of types.SimpleNamespace on free
threading builds, when several threads were calling its
__repr__() method at the same time.
- gh-135836: Fix IndexError in
asyncio.loop.create_connection() that could occur when
non-OSError exception is raised during connection and
socket’s close() raises OSError.
- gh-135836: Fix IndexError in
asyncio.loop.create_connection() that could occur when the
Happy Eyeballs algorithm resulted in an empty exceptions
list during connection attempts.
- gh-135855: Raise TypeError instead of SystemError when
_interpreters.set___main___attrs() is passed a non-dict
object. Patch by Brian Schubert.
- gh-135815: netrc: skip security checks if os.getuid() is
missing. Patch by Bénédikt Tran.
- gh-135640: Address bug where it was possible to call
xml.etree.ElementTree.ElementTree.write() on an ElementTree
object with an invalid root element. This behavior blanked
the file passed to write if it already existed.
- gh-135645: Added supports_isolated_interpreters field to
sys.implementation.
- gh-135646: Raise consistent NameError exceptions in
annotationlib.ForwardRef.evaluate()
- gh-135557: Fix races on heapq updates and list reads on the
free threaded build.
- gh-119180: Only fetch globals and locals if necessary in
annotationlib.get_annotations()
- gh-135561: Fix a crash on DEBUG builds when an HACL* HMAC
routine fails. Patch by Bénédikt Tran.
- gh-135487: Fix reprlib.Repr.repr_int() when given integers
with more than sys.get_int_max_str_digits() digits. Patch
by Bénédikt Tran.
- gh-135335: multiprocessing: Flush stdout and stderr after
preloading modules in the forkserver.
- gh-135069: Fix the “Invalid error handling” exception in
encodings.idna.IncrementalDecoder to correctly replace the
‘errors’ parameter.
- gh-130662: +Accept leading zeros in precision and width
fields for +:class:Decimal formatting, for example
format(Decimal(1.25), '.016f').
- gh-130662: Accept leading zeros in precision and
width fields for Fraction formatting, for example
format(Fraction(1, 3), '.016f').
- gh-87790: Support underscore and comma as thousands
separators in the fractional part for Fraction’s
formatting. Patch by Sergey B Kirpichev.
- gh-87790: Support underscore and comma as thousands
separators in the fractional part for Decimal’s
formatting. Patch by Sergey B Kirpichev.
- gh-130664: Handle corner-case for Fraction’s formatting:
treat zero-padding (preceding the width field by a zero
('0') character) as an equivalent to a fill character of
'0' with an alignment type of '=', just as in case of
float’s.
- Documentation
- gh-136155: EPUB builds are fixed by excluding
non-XHTML-compatible tags.
- Core and Builtins
- gh-109700: Fix memory error handling in
PyDict_SetDefault().
- gh-78465: Fix error message for cls.__new__(cls, ...) where
cls is not instantiable builtin or extension type (with
tp_new set to NULL).
- gh-129958: Differentiate between t-strings and f-strings
in syntax error for newlines in format specifiers of
single-quoted interpolated strings.
- gh-135871: Non-blocking mutex lock attempts now return
immediately when the lock is busy instead of briefly
spinning in the free threading build.
- gh-135106: Restrict the trashcan mechanism to GC’ed objects
and untrack them while in the trashcan to prevent the GC
and trashcan mechanisms conflicting.
- gh-135607: Fix potential weakref races in an object’s
destructor on the free threaded build.
- gh-135608: Fix a crash in the JIT involving attributes of
modules.
- gh-135543: Emit sys.remote_exec audit event
when sys.remote_exec() is called and migrate
remote_debugger_script to cpython.remote_debugger_script.
- gh-134280: Disable constant folding for ~ with a boolean
argument. This moves the deprecation warning from compile
time to runtime.
- C API
- gh-135906: Fix compilation errors when compiling the
internal headers with a C++ compiler.
- Build
- gh-134273: Add support for configuring compiler flags for
the JIT with CFLAGS_JIT
OBS-URL: https://build.opensuse.org/request/show/1291400
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python314?expand=0&rev=16
- Tools/Demos
- gh-135968: Stubs for strip are now provided as part of an
iOS install.
- gh-133600: Backport file reorganization for .
Tools/wasm/wasi This should make backporting future code .
changes easier. It also simplifies instructions around how.
to do WASI builds in the devguide .
- Tests
- gh-135966: The iOS testbed now handles the app_packages
folder as a site directory.
- gh-135494: Fix regrtest to support excluding tests from
--pgo tests. Patch by Victor Stinner.
- Security
- gh-136053: marshal: fix a possible crash when deserializing
slice objects.
- gh-135661: Fix parsing start and end tags in
html.parser.HTMLParser according to the HTML5 standard.
- Whitespaces no longer accepted between </ and the tag
name. E.g. </ script> does not end the script section.
- Vertical tabulation (\v) and non-ASCII whitespaces no
longer recognized as whitespaces. The only whitespaces
are \t\n\r\f and space.
- Null character (U+0000) no longer ends the tag name.
- Attributes and slashes after the tag name in end tags are
now ignored, instead of terminating after the first > in
quoted attribute value. E.g. </script/foo=">"/>.
- Multiple slashes and whitespaces between the last
attribute and closing > are now ignored in both start and
end tags. E.g. <a foo=bar/ //>.
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python314?expand=0&rev=80
- Update to 3.14.0~b3:
- Tests
- gh-132815: Fix test__opcode: add JUMP_BACKWARD to
specialization stats.
- gh-135489: Show verbose output for failing tests during PGO
profiling step with –enable-optimizations.
- gh-135120: Add test.support.subTests().
- Security
- gh-135462: Fix quadratic complexity in processing specially
crafted input in html.parser.HTMLParser. End-of-file errors
are now handled according to the HTML5 specs – comments and
declarations are automatically closed, tags are ignored.
- gh-135034: 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.
- Library
- gh-65697: configparser’s error message when attempting to
write an invalid key is now more helpful.
- gh-135497: Fix os.getlogin() failing for longer usernames
on BSD-based platforms.
- gh-135429: Fix the argument mismatch in _lsprof for
PY_THROW event.
- gh-135368: Fix unittest.mock.Mock generation on
dataclasses.dataclass() objects. Now all special attributes
are set as it was before gh-124429.
- gh-133967: Do not normalize locale name ‘C.UTF-8’ to
‘en_US.UTF-8’.
- gh-135321: Raise a correct exception for values greater
than 0x7fffffff for the BINSTRING opcode in the C
implementation of pickle.
- gh-135276: 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.
- gh-135244: 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 9562, §6.10.3. This affects uuid1() and
uuid6().
- gh-134970: Fix the “unknown action” exception in
argparse.ArgumentParser.add_argument_group() to correctly
replace the action class.
- gh-134718: ast.dump() now only omits None and [] values if
they are default values.
- gh-134939: Add the concurrent.interpreters module. See PEP
734.
- gh-134885: Fix possible crash in the compression.zstd
module related to setting parameter types. Patch by Jelle
Zijlstra.
- gh-134857: Improve error report for doctests run with
unittest. Remove doctest module frames from tracebacks and
redundant newline character from a failure message.
- gh-128840: Fix parsing long IPv6 addresses with embedded
IPv4 address.
- gh-134637: Fix performance regression in calling a ctypes
function pointer in free threading.
- gh-134696: Built-in HACL* and OpenSSL implementations of
hash function constructors now correctly accept the same
documented named arguments. For instance, 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.
- gh-134151: email: Fix TypeError in
email.utils.decode_params() when sorting RFC 2231
continuations that contain an unnumbered section.
- gh-134210: curses.window.getch() now correctly handles
signals. Patch by Bénédikt Tran.
- gh-134152: email: Fix parsing of email message ID with
invalid domain.
- gh-133489: random.getrandbits() can now generate more that
231 bits. random.randbytes() can now generate more that 256
MiB.
- gh-132813: Improve error messages for incorrect types and
values of csv.Dialect attributes.
- gh-132969: Prevent the ProcessPoolExecutor executor thread,
which remains running when shutdown(wait=False), 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.
- gh-127081: Fix libc thread safety issues with os by
replacing getlogin with getlogin_r re-entrant version.
- gh-131884: Fix formatting issues in json.dump() when both
indent and skipkeys are used.
- gh-130999: Avoid exiting the new REPL and offer suggestions
even if there are non-string candidates when errors occur.
- Documentation
- gh-135171: Document that the iterator for the leftmost for
clause in the generator expression is created immediately.
- bpo-45210: Document that error indicator may be set in
tp_dealloc, and how to avoid clobbering it.
- Core and Builtins
- gh-135496: Fix typo in the f-string conversion type error
(“exclamanation” -> “exclamation”).
- gh-135371: Fixed 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.
- gh-127319: 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.
- gh-135171: 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.
- gh-130077: Properly raise custom syntax errors when
incorrect syntax containing names that are prefixes of soft
keywords is encountered. Patch by Pablo Galindo.
- gh-135171: 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.
- gh-116738: Make methods in heapq thread-safe on the free
threaded build.
- gh-134876: Add support to PEP 768 remote debugging for
Linux kernels which don’t have CONFIG_CROSS_MEMORY_ATTACH
configured.
- gh-134889: Fix handling of a few opcodes that leave
operands on the stack when optimizing LOAD_FAST.
- gh-134908: Fix crash when iterating over lines in a text
file on the free threaded build.
- gh-132617: Fix 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.
- gh-134679: Fix crash in the free threading build’s QSBR
code that could occur when changing an object’s __dict__
attribute.
- gh-127682: No longer call __iter__ twice in list
comprehensions. This brings the behavior of list
comprehensions in line with other forms of iteration
- gh-133912: Fix the C API function PyObject_GenericSetDict
to handle extension classes with inline values.
- C API
- gh-134989: 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.
- gh-134989: Implement PyObject_DelAttr() and
PyObject_DelAttrString() as macros in the limited C API
3.12 and older. Patch by Victor Stinner.
- gh-133968: Add PyUnicodeWriter_WriteASCII() function to
write an ASCII string into a PyUnicodeWriter. The function
is faster than PyUnicodeWriter_WriteUTF8(), but has an
undefined behavior if the input string contains non-ASCII
characters. Patch by Victor Stinner.
- Build
- gh-119132: Remove “experimental” tag from the CPython
free-threading build.
- gh-135497: Fix the detection of MAXLOGNAME in the
configure.ac script.
- gh-134923: Windows builds with profile-guided optimization
enabled now use /GENPROFILE and /USEPROFILE instead of
deprecated /LTCG: options.
- gh-134774: Fix Py_DEBUG macro redefinition warnings on
Windows debug builds. Patch by Chris Eibl.
- gh-134632: 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.
OBS-URL: https://build.opensuse.org/request/show/1287713
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python314?expand=0&rev=13
- Tests
- gh-132815: Fix test__opcode: add JUMP_BACKWARD to
specialization stats.
- gh-135489: Show verbose output for failing tests during PGO
profiling step with –enable-optimizations.
- gh-135120: Add test.support.subTests().
- Security
- gh-135462: Fix quadratic complexity in processing specially
crafted input in html.parser.HTMLParser. End-of-file errors
are now handled according to the HTML5 specs – comments and
declarations are automatically closed, tags are ignored.
- gh-135034: 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.
- Library
- gh-65697: configparser’s error message when attempting to
write an invalid key is now more helpful.
- gh-135497: Fix os.getlogin() failing for longer usernames
on BSD-based platforms.
- gh-135429: Fix the argument mismatch in _lsprof for
PY_THROW event.
- gh-135368: Fix unittest.mock.Mock generation on
dataclasses.dataclass() objects. Now all special attributes
are set as it was before gh-124429.
- gh-133967: Do not normalize locale name ‘C.UTF-8’ to
‘en_US.UTF-8’.
- gh-135321: Raise a correct exception for values greater
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python314?expand=0&rev=73
- Update to 3.14.0~b2:
- Tools/Demos
- gh-134215: REPL import autocomplete only suggests private
modules when explicitly specified.
- Tests
- gh-133744: Fix multiprocessing interrupt test. Add an event
to synchronize the parent process with the child process:
wait until the child process starts sleeping. Patch by
Victor Stinner.
- gh-133682: Fixed test case
test.test_annotationlib.TestStringFormat.test_displays
which ensures proper handling of complex data structures
(lists, sets, dictionaries, and tuples) in string
annotations.
- gh-133639: Fix
TestPyReplAutoindent.test_auto_indent_default() doesn’t run
input_code.
- Security
- gh-133767: Fix use-after-free in the “unicode-escape”
decoder with a non-“strict” error handler (CVE-2025-4516
bsc#1243273).
- gh-128840: Short-circuit the processing of long IPv6
addresses early in ipaddress to prevent excessive memory
consumption and a minor denial-of-service.
- Library
- gh-132710: If possible, ensure that uuid.getnode()
returns the same result even across different
processes. Previously, the result was constant only within
the same process. Patch by Bénédikt Tran.
- gh-80334: multiprocessing.freeze_support() now checks for
OBS-URL: https://build.opensuse.org/request/show/1281134
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python314?expand=0&rev=12
- Tools/Demos
- gh-134215: REPL import autocomplete only suggests private
modules when explicitly specified.
- Tests
- gh-133744: Fix multiprocessing interrupt test. Add an event
to synchronize the parent process with the child process:
wait until the child process starts sleeping. Patch by
Victor Stinner.
- gh-133682: Fixed test case
test.test_annotationlib.TestStringFormat.test_displays
which ensures proper handling of complex data structures
(lists, sets, dictionaries, and tuples) in string
annotations.
- gh-133639: Fix
TestPyReplAutoindent.test_auto_indent_default() doesn’t run
input_code.
- Security
- gh-133767: Fix use-after-free in the “unicode-escape”
decoder with a non-“strict” error handler (CVE-2025-4516
bsc#1243273).
- gh-128840: Short-circuit the processing of long IPv6
addresses early in ipaddress to prevent excessive memory
consumption and a minor denial-of-service.
- Library
- gh-132710: If possible, ensure that uuid.getnode()
returns the same result even across different
processes. Previously, the result was constant only within
the same process. Patch by Bénédikt Tran.
- gh-80334: multiprocessing.freeze_support() now checks for
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python314?expand=0&rev=71
- Update to 3.14.0~b1:
- Tools/Demos
- gh-130453: Allow passing multiple keyword arguments with
the same function name in pygettext.
- gh-130195: Add warning messages when pygettext
unimplemented -a/--extract-all option is called.
- Tests
- gh-133131: The iOS testbed will now select the most
recently released “SE-class” device for testing if a device
isn’t explicitly specified.
- gh-91048: Add ability to externally inspect all pending
asyncio tasks, even if no task is currently entered on the
event loop.
- gh-109981: The test helper that counts the list of open
file descriptors now uses the optimised /dev/fd approach on
all Apple platforms, not just macOS. This avoids crashes
caused by guarded file descriptors.
- gh-132678: Add --prioritize to -m test. This option allows
the user to specify which selected tests should execute
first, even if the order is otherwise randomized. This is
particularly useful for tests that run the longest.
- gh-131290: Tests in Lib/test can now be correctly executed
as standalone scripts.
- Security
- gh-115322: The underlying extension modules behind
readline:, subprocess, and ctypes now raise audit events
on previously uncovered code paths that could lead to file
system access related to C function calling and external
binary execution. The ctypes.call_function audit hook has
also been fixed to use an unsigned value for its function
pointer.
- Library
- gh-133490: Add color support to PDB in remote mode.
- gh-132493: Avoid eagerly evaluating annotations in
functions decorated with reprlib.recursive_repr().
- gh-130645: Add color to stdlib argparse CLIs. Patch by Hugo
van Kemenade.
- gh-119180: Make annotationlib.get_annotations() succeed
with the FORWARDREF format if evaluating the annotations
throws an exception other than NameError or AttributeError.
- gh-133351: Fix remote PDB to correctly request tab
completions for Python expressions from the server when
completing a continuation line of a multi-line Python
block.
- gh-133367: Add the --feature-version, --optimize,
and --show-empty options to the ast command-line
interface. Patch by Semyon Moroz.
- gh-133363: The cmd.Cmd class has been fixed to reliably
call the completedefault method whenever the do_shell
method is not defined and tab completion is requested for a
line beginning with !.
- gh-113081: Highlight syntax on source code in pdb.
- gh-133349: Introduced auto-indent in pdb multi-line input.
- gh-133306: Use \z instead of \Z in fnmatch.translate() and
glob.translate().
- gh-133306: Support \z as a synonym for \Z in regular
expressions.
- gh-133300: Make argparse.ArgumentParser’s suggest_on_error
a keyword-only parameter. Patch by Hugo van Kemenade.
- gh-133290: Fix attribute caching issue when setting
ctypes._Pointer._type_ in the undocumented and deprecated
ctypes.SetPointerType() function and the undocumented
set_type() method.
- gh-133223: When PDB is attached to a remote process, do a
better job of intercepting Ctrl+C and forwarding it to the
remote process.
- gh-133153: Do not complete pdb commands in interact mode of
pdb.
- gh-133139: Add the curses.assume_default_colors() function,
a refinement of the curses.use_default_colors() function
which allows to change the color pair 0.
- gh-133089: Use original timeout value for
subprocess.TimeoutExpired when the func subprocess.run()
is called with a timeout instead of sometimes a confusing
partial remaining time out value used internally on the
final wait().
- gh-133036: codecs.open() is now deprecated. Use open()
instead. Contributed by Inada Naoki.
- gh-132987: Many builtin and extension functions which
accept an unsigned integer argument, now use __index__() if
available.
- gh-124703: Set return code to 1 when aborting process from
pdb.
- gh-133005: Support passing preset option to tarfile.open()
when using 'w|xz' mode.
- gh-115032: Support for custom logging handlers with the
strm argument is deprecated and scheduled for removal in
Python 3.16. Define handlers with the stream argument
instead. Patch by Mariusz Felisiak.
- gh-132991: Add socket.IP_FREEBIND constant on Linux 2.4 and
later.
- gh-132995: Bump the version of pip bundled in ensurepip to
version 25.1.1
- gh-132933: The zipapp module now applies the filter when
creating the list of files to add, rather than waiting
until the file is being added to the archive.
- gh-121249: Always support the float complex and double
complex C types in the struct module. Patch by Sergey B
Kirpichev.
- gh-132915: fcntl.fcntl() and fcntl.ioctl() can now detect
a buffer overflow and raise SystemError. The stack and
memory can be corrupted in such case, so treat this error
as fatal.
- gh-132017: Fix error when pyrepl is suspended, then resumed
and terminated.
- gh-132893: Improved statistics.NormalDist.cdf() accuracy
for inputs smaller than the mean.
- gh-130328: Speedup pasting in PyREPL on Windows. Fix by
Chris Eibl.
- gh-132882: Fix copying of typing.Union objects containing
objects that do not support the | operator.
- gh-93696: Fixed the breakpoint display error for frozen
modules in pdb.
- gh-129965: Add MIME types for .7z, .apk, .deb, .glb, .gltf,
.gz, .m4v, .php, .rar, .rpm, .stl and .wmv. Patch by Hugo
van Kemenade.
- gh-132742: fcntl.fcntl() now supports arbitrary bytes-like
objects, not only bytes. fcntl.ioctl() now automatically
retries system calls failing with EINTR and releases the
GIL during a system call even for large bytes-like object.
- gh-132451: The CLI for the PDB debugger now accepts a -p
PID argument to allow attaching to a running process. The
process must be running the same version of Python as the
one running PDB.
- gh-125618: Add a format parameter to
annotationlib.ForwardRef.evaluate(). Evaluating annotations
in the FORWARDREF format now succeeds in more cases that
would previously have raised an exception.
- gh-132805: Fix incorrect handling of nested non-constant
values in the FORWARDREF format in annotationlib.
- gh-132734: Add new constants for Bluetooth sockets.
- gh-132673: Fix AssertionError raised on ctypes.Structure
with _align_ = 0 and _fields_ = [].
- gh-132578: Rename the threading.Thread._handle field
to avoid shadowing methods defined on subclasses of
threading.Thread.
- gh-132561: Fix the public locked method of
multiprocessing.SemLock class. Also adding 2 tests for the
derivated multiprocessing.Lock and multiprocessing.RLock
classes.
- gh-121468: Add pdb.set_trace_async() function to support
await statements in pdb.
- gh-132493: typing.Protocol now uses
annotationlib.get_annotations() when checking whether
or not an instance implements the protocol with
isinstance(). This enables support for isinstance checks
against classes with deferred annotations.
- gh-132536: Do not disable PY_THROW event in bdb because it
can’t be disabled.
- gh-132527: Include the valid typecode ‘w’ in the error
message when an invalid typecode is passed to array.array.
- gh-132099: The Bluetooth socket with the BTPROTO_HCI
protocol on Linux now accepts an address in the format of
an integer device_id, not only a tuple (device_id,).
- gh-81793: Fix os.link() on platforms (like Linux)
where the system link() function does not follow
symlinks. On Linux, it now follows symlinks by default
or if follow_symlinks=True is specified. On Windows, it
now raises an error if follow_symlinks=True is passed. On
macOS, it now raises an error if follow_symlinks=False is
passed and the system linkat() function is not available at
runtime.
- gh-132493: Support creation of typing.Protocol classes with
annotations that cannot be resolved at class creation time.
- gh-132491: Rename annotationlib.value_to_string to
annotationlib.type_repr() and provide better handling for
function objects.
- gh-132426: Add
annotationlib.get_annotate_from_class_namespace() as a
helper for accessing annotations in metaclasses, and remove
annotationlib.get_annotate_function.
- gh-70145: Add support for channels in Bluetooth HCI
protocol (BTPROTO_HCI).
- gh-131913: Add a shortcut function
multiprocessing.Process.interrupt() alongside the
existing multiprocessing.Process.terminate() and
multiprocessing.Process.kill() for an improved control over
child process termination.
- gh-132439: Fix PyREPL on Windows: characters entered via
AltGr are swallowed. Patch by Chris Eibl.
- gh-132429: Fix support of Bluetooth sockets on NetBSD
and DragonFly BSD. Add support for cid and bdaddr_type
in the BTPROTO_L2CAP address on FreeBSD. Return cid in
getsockname() for BTPROTO_L2CAP if it is not zero.
- gh-132106: QueueListener.start now raises a RuntimeError if
the listener is already started.
- gh-132417: Fix a NULL pointer dereference when a C function
called using ctypes with restype py_object returns NULL.
- gh-132385: Fix instance error suggestions trigger potential
exceptions in object.__getattr__() in traceback.
- gh-125866: Add optional add_scheme argument to
urllib.request.pathname2url(); when set to true, a complete
URL is returned. Likewise add optional require_scheme
argument to url2pathname(); when set to true, a complete
URL is accepted.
- gh-132308: A traceback.TracebackException now correctly
renders the __context__ and __cause__ attributes from
falsey Exception, and the exceptions attribute from falsey
ExceptionGroup.
- gh-130645: Add colour to argparse help output. Patch by
Hugo van Kemenade.
- gh-127495: In PyREPL, append a new entry to the
PYTHON_HISTORY file after every statement. This should
preserve command-line history after interpreter is
terminated. Patch by Sergey B Kirpichev.
- gh-129463: Comparison of annotationlib.ForwardRef objects
no longer uses the internal __code__ and __ast_node__
attributes, which are used as caches.
- gh-132250: Fixed the SystemError in cProfile when locating
the actual C function of a method raises an exception.
- gh-132064: annotationlib.get_annotations() now uses
the __annotate__ attribute if it is present, even if
__annotations__ is not present. Additionally, the function
now raises a TypeError if it is passed an object that does
not have any annotatins.
- gh-130664: Support the '_' digit separator in formatting
of the integral part of Decimal’s. Patch by Sergey B
Kirpichev.
- gh-131952: Add color output to the json CLI. Patch by Tomas
Roun.
- gh-132063: Prevent exceptions that evaluate as
falsey (namely, when their __bool__ method returns
False or their __len__ method returns 0) from being
ignored by concurrent.futures.ProcessPoolExecutor and
concurrent.futures.ThreadPoolExecutor.
- gh-132106: logging.handlers.QueueListener now implements
the context manager protocol, allowing it to be used in a
with statement.
- gh-132054: The application/yaml mime type (RFC 9512) is now
supported by mimetypes. Patch by Sasha “Nelie” Chernykh and
Hugo van Kemenade.
- gh-119605: Respect follow_wrapped for __init__() and
__new__() methods when getting the class signature for a
class with inspect.signature(). Preserve class signature
after wrapping with warnings.deprecated(). Patch by Xuehai
Pan.
- gh-118761: Improve import times by up to 33x for the shlex
module, and improve the performance of shlex.quote() by up
to 12x. Patch by Adam Turner.
- gh-85302: Add support for BTPROTO_SCO in sockets on
FreeBSD.
- gh-131757: Make functools.lru_cache() call the cached
function unlocked to allow concurrency.
- gh-131423: ssl can show descriptions for errors added in
OpenSSL 3.4.1. Patch by Bénédikt Tran.
- gh-131434: Improve error reporting for incorrect format in
time.strptime().
- gh-131524: Add help message to platform command-line
interface. Contributed by Harry Lees.
- gh-100926: Move ctypes.POINTER() types cache from
a global internal cache (_pointer_type_cache) to
the ctypes._CData.__pointer_type__ attribute of the
corresponding ctypes types. This will stop the cache from
growing without limits in some situations.
- gh-85702: If zoneinfo._common.load_tzdata is given a
package without a resource a ZoneInfoNotFoundError is
raised rather than a IsADirectoryError.
- gh-123471: Make concurrent iterations over itertools.repeat
safe under free-threading.
- gh-131127: Systems using LibreSSL now successfully build.
- gh-89157: Make the pure Python implementation of
datetime.date.fromisoformat(), only accept ASCII strings
for consistency with the C implementation.
- gh-130941: Fix configparser.ConfigParser parsing empty
interpolation with allow_no_value set to True.
- gh-110067: Make heapq max-heap functions
heapq.heapify_max(), heapq.heappush_max(),
heapq.heappop_max(), and heapq.heapreplace_max()
public. Previous underscored naming is kept for backwards
compatibility. Additionally, the missing function
heapq.heappushpop_max() has been added to both the C and
Python implementations.
- gh-129098: Fix REPL traceback reporting when using
compile() with an inexisting file. Patch by Bénédikt Tran.
- gh-130631: http.cookiejar.join_header_words() is now more
similar to the original Perl version. It now quotes the
same set of characters and always quote values that end
with "\n".
- gh-130482: Add ability to specify name for
tkinter.OptionMenu and tkinter.ttk.OptionMenu.
- gh-77065: Add keyword-only optional argument echo_char for
getpass.getpass() for optional visual keyboard feedback
support. Patch by Semyon Moroz.
- gh-130317: Fix PyFloat_Pack2() and PyFloat_Unpack2()
for NaN’s with payload. This corrects round-trip for
struct.unpack() and struct.pack() in case of the IEEE
754 binary16 “half precision” type. Patch by Sergey B
Kirpichev.
- gh-130402: Joining running daemon threads during
interpreter shutdown now raises PythonFinalizationError.
- gh-130167: Improve speed of difflib.IS_LINE_JUNK(). Patch
by Semyon Moroz.
- gh-101410: Added more detailed messages for domain errors
in the math module.
- gh-128384: Make warnings.catch_warnings use a context
variable for holding the warning filtering state if
the sys.flags.context_aware_warnings flag is set to
true. This makes using the context manager thread-safe
in multi-threaded programs. The flag is true by default
in free-threaded builds and is otherwise false. The
value of the flag can be overridden by the the -X
context_aware_warnings command-line option or by the
PYTHON_CONTEXT_AWARE_WARNINGS environment variable.
- gh-129719: Fix missing socket.CAN_RAW_ERR_FILTER constant
in the socket module on Linux systems. It was missing since
Python 3.11.
- gh-129027: Raise DeprecationWarning for
sys._clear_type_cache(). This function was deprecated in
Python 3.13 but it didn’t raise a runtime warning.
- gh-128307: Add eager_start keyword argument to
asyncio.loop.create_task()
- gh-127604: Add support for printing the C stack trace on
systems that support it via faulthandler.dump_c_stack() or
via the c_stack argument in faulthandler.enable().
- gh-127385: Add the F_DUPFD_QUERY constant to the fcntl
module.
- gh-126838: Add resolve_host keyword-only parameter to
urllib.request.url2pathname(), and fix handling of file
URLs with authorities.
- gh-82129: Fix NameError when calling
typing.get_type_hints() on a dataclasses.dataclass()
created by dataclasses.make_dataclass() with un-annotated
fields.
- gh-122559: Remove __reduce__() and __reduce_ex__() methods
that always raise TypeError in the C implementation
of io.FileIO, io.BufferedReader, io.BufferedWriter
and io.BufferedRandom and replace them with default
__getstate__() methods that raise TypeError. This restores
fine details of behavior of Python 3.11 and older versions.
- gh-122179: hashlib.file_digest() now raises BlockingIOError
when no data is available during non-blocking I/O. Before,
it added spurious null bytes to the digest.
- gh-53032: Expose decimal.IEEEContext() to support creation
of contexts corresponding to the IEEE 754 (2008) decimal
interchange formats. Patch by Sergey B Kirpichev.
- gh-120220: Deprecate the tkinter.Variable
methods trace_variable(), trace_vdelete() and
trace_vinfo(). Methods trace_add(), trace_remove() and
trace_info() can be used instead.
- gh-113539: webbrowser: Names in the BROWSER environment
variable can now refer to already registered web browsers,
instead of always generating a new browser command.
This makes it possible to set BROWSER to the value of one
of the supported browsers on macOS.
- bpo-44172: Keep a reference to original curses windows in
subwindows so that the original window does not get deleted
before subwindows.
- gh-75223: Deprecate undotted extensions in
mimetypes.MimeTypes.add_type(). Patch by Hugo van Kemenade.
- IDLE
- gh-112936: fix IDLE: no Shell menu item in single-process
mode.
- Documentation
- gh-107006: Move documentation and example code for
threading.local from its docstring to the official docs.
- gh-125142: As part of the builtin help intro text, show the
keyboard shortcuts for the new, non-basic REPL (F1, F2, and
F3).
- Core and Builtins
- gh-133336: -J is no longer reserved for use by
Jython. Patch by Adam Turner.
- gh-133261: Fix bug where the cycle GC could untrack
objects in the trashcan because they looked like they were
immortal. When objects are added to the trashcan, we take
care to ensure they keep a mortal reference count.
- gh-133346: Added experimental color theming support to the
_colorize module.
- gh-132917: For the free-threaded build, check the process
memory usage increase before triggering a full automatic
garbage collection. If the memory used has not increased
10% since the last collection then defer it.
- gh-91048: Add a new python -m asyncio ps PID command-line
interface to inspect asyncio tasks in a running Python
process. Displays a flat table of await relationships. A
variant showing a tree view is also available as python -m
asyncio pstree PID. Both are useful for debugging async
code. Patch by Pablo Galindo, Łukasz Langa, Yury Selivanov,
and Marta Gomez Macias.
- gh-133304: Workaround NaN’s “canonicalization” in
PyFloat_Pack4() and PyFloat_Unpack4() on RISC-V.
- gh-133197: Improve SyntaxError error messages for
incompatible string / bytes prefixes.
- gh-133231: Add new utilities of observing JIT compilation:
sys._jit.is_available(), sys._jit.is_enabled(), and
sys._jit.is_active().
- gh-133194: ast.parse() will no longer parse new PEP 758
syntax with older feature_version passed.
- gh-131798: Split CALL_LEN into several uops allowing the
JIT to remove them when optimizing. Patch by Diego Russo.
- gh-131798: Use sym_new_type instead of sym_new_not_null for
_BUILD_STRING, _BUILD_SET
- gh-132942: Fix two races in the type lookup cache. This
affected the free-threaded build and could cause crashes
(apparently quite difficult to trigger).
- gh-131798: Propagate the return type of
_BINARY_OP_SUBSCR_TUPLE_INT in JIT. Patch by Tomas Roun
- gh-132952: Speed up startup with the -S argument by
importing the private _io module instead of io. This fixes
a performance regression introduced earlier in Python 3.14
development and restores performance to the level of Python
3.13.
- gh-131798: Allow the JIT to remove int guards after
_CALL_LEN by setting the return type to int. Patch by Diego
Russo
- gh-131798: Split CALL_TUPLE_1 into several uops allowing
the JIT to remove some of them. Patch by Tomas Roun
- gh-131798: Split CALL_STR_1 into several uops allowing the
JIT to remove some of them. Patch by Tomas Roun
- gh-132825: Enhance unhashable key/element error messages
for dict and set. Patch by Victor Stinner.
- gh-131591: Reset any PEP 768 remote debugging pending call
in children after os.fork() calls.
- gh-132713: Fix repr(list) race condition: hold a strong
reference to the item while calling repr(item). Patch by
Victor Stinner.
- gh-132661: Implement PEP 750 (Template Strings). Add
new syntax for t-strings and implement new
internal string.templatelib.Template and
string.templatelib.Interpolation types.
- gh-132479: Fix compiler crash in certain circumstances
where multiple module-level annotations include
comprehensions and other nested scopes.
- gh-132747: Fix a crash when calling __get__() of a method
with a None second argument.
- gh-132744: Certain calls now check for runaway recursion
and respect the system recursion limit.
- gh-132449: Syntax errors that look like misspellings of
Python keywords now provide a helpful fix suggestion for
the typo. Contributed by Pablo Galindo Salgado.
- gh-132737: Support profiling code that requires __main__,
such as pickle.
- gh-132639: Added PyLong_AsNativeBytes(),
PyLong_FromNativeBytes() and
PyLong_FromUnsignedNativeBytes() to the limited C API.
- gh-100239: Add specialisation for BINARY_OP/SUBSCR on list
and slice.
- gh-132508: Uses tagged integers on the evaluation stack
to represent the instruction offsets when reraising an
exception. This avoids the need to box the integer which
could fail in low memory conditions.
- gh-124476: Fix decoding from the locale encoding in the
C.UTF-8 locale.
- gh-131927: Compiler warnings originating from the same
module and line number are now only emitted once, matching
the behaviour of warnings emitted from user code. This can
also be configured with warnings filters.
- gh-132457: Make staticmethod() and classmethod() generic.
- gh-131798: Use sym_new_type instead of sym_new_not_null for
_BUILD_LIST, _BUILD_SET, _BUILD_MAP
- gh-131798: Split CALL_TYPE_1 into several uops allowing the
JIT to remove some of them.
- gh-132386: Fix crash when passing a dict subclass as the
globals parameter to exec().
- gh-127682: No longer call __iter__ twice when creating and
executing a generator expression. Creating a generator
expression from a non-interable will raise only when the
generator expression is executed. This brings the behavior
of generator expressions in line with other generators.
- gh-132261: The internal storage for annotations and
annotate functions on classes now uses different keys in
the class dictionary. This eliminates various edge cases
where access to the __annotate__ and __annotations__
attributes would behave unpredictably.
- gh-132284: Don’t wrap base PyCFunction slots on class
creation if not overridden.
- gh-130415: Improve the JIT’s ability to remove unused
constant and local variable loads, and fix an issue where
deallocating unused values could cause JIT code to crash or
behave incorrectly.
- gh-126703: Fix possible use after free in cases where a
method’s definition has the same lifetime as its self.
- gh-132286: Fix that type.__annotate__ was not deleted, when
type.__annotations__ was deleted.
- gh-131798: Allow the JIT to remove an extra _TO_BOOL_BOOL
instruction after _CONTAINS_OP_DICT by setting the return
type to bool.
- gh-124715: Prevents against stack overflows when calling
Py_DECREF(). Third-party extension objects no longer need
to use the “trashcan” mechanism, as protection is now built
into the Py_DECREF() macro.
- gh-131798: Allow the JIT compiler to remove some type
checks for operations on lists, tuples, dictionaries, and
sets.
- gh-128398: Improve error message when an object supporting
the synchronous (resp. asynchronous) context manager
protocol is entered using async with (resp. with) instead
of with (resp. async with). Patch by Bénédikt Tran.
- gh-131798: Allow the JIT to remove unicode guards after
_BINARY_OP_SUBSCR_STR_INT by setting the return type to
string.
- gh-131878: Handle uncaught exceptions in the main input
loop for the new REPL.
- gh-131878: Fix support of unicode characters with two or
more codepoints on Windows in the new REPL.
- gh-126835: Move constant folding to the peephole
optimizer. Rename AST optimization related files
(Python/ast_opt.c -> Python/ast_preprocess.c), structs
(_PyASTOptimizeState -> _PyASTPreprocessState) and
functions (_PyAST_Optimize -> _PyAST_Preprocess,
_PyCompile_AstOptimize -> _PyCompile_AstPreprocess).
- gh-114809: Add support for macOS multi-arch builds with the
JIT enabled
- gh-131507: PyREPL now supports syntax
highlighing. Contributed by Łukasz Langa.
- gh-130907: If the __annotations__ of a module object
are accessed while the module is executing, return the
annotations that have been defined so far, without caching
them.
- gh-130104: Three-argument pow() now try calling __rpow__()
if necessary. Previously it was only called in two-argument
pow() and the binary power operator.
- gh-130070: Fixed an assertion error for exec() passed a
string source and a non-None closure. Patch by Bartosz
Sławecki.
- gh-129958: Fix a bug that was allowing newlines
inconsitently in format specifiers for single-quoted
f-strings. Patch by Pablo Galindo.
- gh-129858: elif statements that follow an else block now
have a specific error message.
- gh-69605: Add module autocomplete to PyREPL.
- gh-128555: Add the sys.flags.thread_inherit_context flag.
- This flag is set to true by default on the
free-threaded build and false otherwise. If the flag
is true, starting a new thread using threading.Thread
will, by default, use a copy of the contextvars.Context
from the caller of threading.Thread.start() rather than
using an empty context.
- Add the -X thread_inherit_context command-line option
and PYTHON_THREAD_INHERIT_CONTEXT environment variable,
which set the thread_inherit_context flag.
- Add the context keyword parameter to Thread. It can be
used to explicitly pass a context value to be used by a
new thread.
- Make the _contextvars module built-in.
- gh-123539: Improve SyntaxError message for using import ...
as and from ... import ... as with not a name.
- gh-102567: -X importtime now accepts value 2, which
indicates that an importtime entry should also be printed
if an imported module has already been loaded. Patch by
Noah Kim and Adam Turner.
- gh-116436: Improve error message when TypeError occurs
during dict.update()
- gh-103997: String arguments passed to “-c” are now
automatically dedented as if by textwrap.dedent(). This
allows “python -c” invocations to be indented in shell
scripts without causing indentation errors. (Patch by Jon
Crall and Steven Sun)
- gh-89562: Remove hostflags member from PySSLContext struct.
- C API
- gh-133166: Fix regression where PyType_GetModuleByDef()
returns NULL without setting TypeError when a static type
is passed.
- gh-133164: Add
PyUnstable_Object_IsUniqueReferencedTemporary() function
for determining if an object exists as a unique temporary
variable on the interpreter’s stack. This is a replacement
for some cases where checking that Py_REFCNT() is one is
no longer sufficient to determine if it’s safe to modify a
Python object in-place with no visible side effects.
- gh-133140: Add PyUnstable_Object_IsUniquelyReferenced()
as a replacement for Py_REFNCT(op) == 1 on free threaded
builds of Python.
- gh-131747: On non-Windows platforms, deprecate using
ctypes.Structure._pack_ to use a Windows-compatible layout
on non-Windows platforms. The layout should be specified
explicitly by setting ctypes.Structure._layout_ to 'ms'.
- gh-128972: For non-free-threaded builds, the memory layout
of PyASCIIObject is reverted to match Python 3.13. (Note
that the structure is not part of stable ABI and so its
memory layout is guaranteed to remain stable.)
- gh-133079: The undocumented APIs Py_C_RECURSION_LIMIT and
PyThreadState.c_recursion_remaining, added in 3.13, are
removed without a deprecation period.
- gh-132987: The k and K formats in PyArg_Parse() now support
the __index__() special method, like all other integer
formats.
- gh-132909: Fix an overflow when handling the K format in
Py_BuildValue(). Patch by Bénédikt Tran.
- gh-132798: Deprecated and undocumented
functions PyUnicode_AsEncodedObject(),
PyUnicode_AsDecodedObject(), PyUnicode_AsEncodedUnicode()
and PyUnicode_AsDecodedUnicode() are scheduled for removal
in 3.15.
- gh-132470: Creating a ctypes.CField with a byte_size that
does not match the actual type size now raises a ValueError
instead of crashing the interpreter.
- gh-112068: Add support of nullable arguments in
PyArg_Parse() and similar functions. Adding ? after any
format unit makes None be accepted as a value.
- gh-50333: Non-tuple sequences are deprecated as argument
for the (items) format unit in PyArg_ParseTuple() and other
argument parsing functions if items contains format units
which store a borrowed buffer or a borrowed reference.
- Build
- gh-113464: Use the cpython-bin-deps “externals” repository
for Windows LLVM dependency management. Installing LLVM
manually is no longer necessary for Windows JIT builds.
- gh-133183: iOS compiler shims now include
IPHONEOS_DEPLOYMENT_TARGET in target triples, ensuring that
SDK version minimums are honored.
- gh-133167: Fix compilation process with
--enable-optimizations and --without-docstrings.
- gh-133171: Since free-threaded builds do not support the
experimental JIT compiler, prevent these configurations
from being combined.
- gh-132758: Fix building with tail call interpreter and
pystats.
- gh-132649: The PClayout script now allows passing
--include-tcltk on Windows ARM64.
- gh-132257: Change the default LTO flags on GCC to not
pass -flto-partition=none, and allow parallelization of
LTO. For newer GNU makes and GCC, this has a multiple
factor speedup for LTO build times, with no noticeable loss
in performance.
- gh-132026: Fix use of undefined identifiers in platform
triplet detection on MIPS Linux platforms.
- Disabled GIL and experimental JIT cannot be combined.
- Remove python-3.3.0b1-test-posix_fadvise.patch (not needed
since kernel 3.6-rc1)
- _contextvars is not a dynamic module any more
(gh#python/cpython#128384)
- rename _testexternalinspection to _remotedebugging
(gh#python/cpython!133284)
OBS-URL: https://build.opensuse.org/request/show/1276737
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python314?expand=0&rev=9
- Tools/Demos
- gh-130453: Allow passing multiple keyword arguments with
the same function name in pygettext.
- gh-130195: Add warning messages when pygettext
unimplemented -a/--extract-all option is called.
- Tests
- gh-133131: The iOS testbed will now select the most
recently released “SE-class” device for testing if a device
isn’t explicitly specified.
- gh-91048: Add ability to externally inspect all pending
asyncio tasks, even if no task is currently entered on the
event loop.
- gh-109981: The test helper that counts the list of open
file descriptors now uses the optimised /dev/fd approach on
all Apple platforms, not just macOS. This avoids crashes
caused by guarded file descriptors.
- gh-132678: Add --prioritize to -m test. This option allows
the user to specify which selected tests should execute
first, even if the order is otherwise randomized. This is
particularly useful for tests that run the longest.
- gh-131290: Tests in Lib/test can now be correctly executed
as standalone scripts.
- Security
- gh-115322: The underlying extension modules behind
readline:, subprocess, and ctypes now raise audit events
on previously uncovered code paths that could lead to file
system access related to C function calling and external
binary execution. The ctypes.call_function audit hook has
also been fixed to use an unsigned value for its function
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python314?expand=0&rev=53
- Update to 3.14.0~a7:
- Tools/Demos
- gh-132121: Always escape non-printable Unicode characters in
pygettext.
- gh-131852: msgfmt no longer adds the POT-Creation-Date to
generated .mo files for consistency with GNU msgfmt.
- Tests
- gh-131277: Allow to unset one or more environment variables
at once via EnvironmentVarGuard.unset(). Patch by Bénédikt
Tran.
- gh-131050: test_ssl.test_dh_params is skipped if the
underlying TLS library does not support finite-field
ephemeral Diffie-Hellman.
- Security
- gh-131809: Update bundled libexpat to 2.7.1
- gh-131261: Upgrade to libexpat 2.7.0
- gh-121284: Fix bug in the folding of rfc2047 encoded-words
when flattening an email message using a modern email
policy. Previously when an encoded-word was too long for
a line, it would be decoded, split across lines, and
re-encoded. But commas and other special characters in the
original text could be left unencoded and unquoted. This
could theoretically be used to spoof header lines using a
carefully constructed encoded-word if the resulting rendered
email was transmitted or re-parsed.
- Library
- gh-132174: Fix function name in error message of
_interpreters.run_string.
- gh-132171: Fix crash of _interpreters.run_string on string
subclasses.
OBS-URL: https://build.opensuse.org/request/show/1273280
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python314?expand=0&rev=8
