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2 weeks agogh-122581: Use parser mutex in default build for subinterpreters (gh-142959)
Sam Gross [Sat, 20 Dec 2025 20:37:31 +0000 (15:37 -0500)] 
gh-122581: Use parser mutex in default build for subinterpreters (gh-142959)

2 weeks agogh-120321: Avoid `-Wunreachable-code` warning on Clang (gh-143022)
Sam Gross [Sat, 20 Dec 2025 19:42:12 +0000 (14:42 -0500)] 
gh-120321: Avoid `-Wunreachable-code` warning on Clang (gh-143022)

2 weeks agogh-142834: pdb commands command should use last available breakpoint (#142835)
Hai Zhu [Sat, 20 Dec 2025 17:27:34 +0000 (01:27 +0800)] 
gh-142834:  pdb commands command should use last available breakpoint (#142835)

2 weeks agogh-143012: use `Py_ssize_t` cast for `PyBytes_FromStringAndSize` (#143013)
AZero13 [Sat, 20 Dec 2025 07:37:10 +0000 (02:37 -0500)] 
gh-143012: use `Py_ssize_t` cast for `PyBytes_FromStringAndSize` (#143013)

2 weeks agogh-142927: Tachyon: Start with user's default light/dark theme (#142987)
Hugo van Kemenade [Sat, 20 Dec 2025 01:36:09 +0000 (03:36 +0200)] 
gh-142927: Tachyon: Start with user's default light/dark theme (#142987)

2 weeks agogh-129069: Fix listobject.c data races due to memmove (gh-142957)
Sam Gross [Fri, 19 Dec 2025 23:06:47 +0000 (18:06 -0500)] 
gh-129069: Fix listobject.c data races due to memmove (gh-142957)

The use of memmove and _Py_memory_repeat were not thread-safe in the
free threading build in some cases. In theory, memmove and
_Py_memory_repeat can copy byte-by-byte instead of pointer-by-pointer,
so concurrent readers could see uninitialized data or tearing.

Additionally, we should be using "release" (or stronger) ordering to be
compliant with the C11 memory model when copying objects within a list.

2 weeks agogh-120321: Fix TSan reported race in gen_clear_frame (gh-142995)
Sam Gross [Fri, 19 Dec 2025 22:33:49 +0000 (17:33 -0500)] 
gh-120321: Fix TSan reported race in gen_clear_frame (gh-142995)

TSan treats compare-exchanges that fail as if they are writes
so there is a false positive with the read of gi_frame_state in
gen_close.

2 weeks agogh-120321: Make gi_frame_state transitions atomic in FT build (gh-142599)
Sam Gross [Fri, 19 Dec 2025 19:10:37 +0000 (14:10 -0500)] 
gh-120321: Make gi_frame_state transitions atomic in FT build (gh-142599)

This makes generator frame state transitions atomic in the free
threading build, which avoids segfaults when trying to execute
a generator from multiple threads concurrently.

There are still a few operations that aren't thread-safe and may crash
if performed concurrently on the same generator/coroutine:

 * Accessing gi_yieldfrom/cr_await/ag_await
 * Accessing gi_frame/cr_frame/ag_frame
 * Async generator operations

2 weeks agogh-142476: fix memory leak when creating JIT executors (GH-142492)
Shamil [Fri, 19 Dec 2025 19:07:11 +0000 (22:07 +0300)] 
gh-142476: fix memory leak when creating JIT executors (GH-142492)

2 weeks agogh-134584: JIT: Borrow references for immortal promoted globals (GH-142921)
Ken Jin [Fri, 19 Dec 2025 19:06:34 +0000 (03:06 +0800)] 
gh-134584: JIT: Borrow references for immortal promoted globals (GH-142921)

JIT: Borrow references for immortal promoted globals

2 weeks agogh-142776: Ensure fp file descriptor is closed on all code paths in import.c (GH...
stratakis [Fri, 19 Dec 2025 18:14:52 +0000 (19:14 +0100)] 
gh-142776: Ensure fp file descriptor is closed on all code paths in import.c (GH-142777)

2 weeks agogh-142961: Fix constant folding len(tuple) in JIT (GH-142963)
Ken Jin [Fri, 19 Dec 2025 17:43:36 +0000 (01:43 +0800)] 
gh-142961: Fix constant folding len(tuple) in JIT (GH-142963)

2 weeks agogh-134160: Start "Extending and embedding" with a Diataxis-style tutorial (GH-142314)
Petr Viktorin [Fri, 19 Dec 2025 16:48:34 +0000 (17:48 +0100)] 
gh-134160: Start "Extending and embedding" with a Diataxis-style tutorial (GH-142314)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Éric <merwok@netwok.org>
Co-authored-by: Daniele Nicolodi <daniele@grinta.net>
Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
2 weeks agoJIT: Rename trampoline.c to shim.c (#142974)
Diego Russo [Fri, 19 Dec 2025 14:39:41 +0000 (14:39 +0000)] 
JIT: Rename trampoline.c to shim.c (#142974)

2 weeks agogh-136282: Configparser: create unnamed sections via mapping protocol access (GH...
Rogdham [Fri, 19 Dec 2025 12:44:03 +0000 (13:44 +0100)] 
gh-136282: Configparser: create unnamed sections via mapping protocol access (GH-136313)

2 weeks agogh-142527: Docs: Clarify that random.seed() discards the sign of an integer input...
Andrej [Fri, 19 Dec 2025 08:29:35 +0000 (00:29 -0800)] 
gh-142527: Docs: Clarify that random.seed() discards the sign of an integer input (#142483)

If *a* is an integer, the sign of *a* is discarded in the C source code. Clarify this behavior to prevent foot guns, where a common use case might naively assume that flipping the sign will produce different sequences (e.g. for a train/test split of a synthetic data generator in machine learning).

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
2 weeks agogh-142560: prevent use-after-free in search-like methods by exporting buffer in bytea...
wangxiaolei [Fri, 19 Dec 2025 08:02:23 +0000 (16:02 +0800)] 
gh-142560: prevent use-after-free in search-like methods by exporting buffer in bytearray (#142938)

2 weeks agoGH-134584: Remove redundant refcount for `BINARY_OP_SUBSCR_STR_INT` (#142844)
Savannah Ostrowski [Thu, 18 Dec 2025 21:29:54 +0000 (13:29 -0800)] 
GH-134584: Remove redundant refcount for `BINARY_OP_SUBSCR_STR_INT` (#142844)

2 weeks agogh-118342: [Enum] update docs (GH-137290)
Ethan Furman [Thu, 18 Dec 2025 18:31:37 +0000 (10:31 -0800)] 
gh-118342: [Enum] update docs (GH-137290)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
2 weeks agogh-134584: Eliminate redundant refcounting from _BINARY_OP_SUBSCR_LIST_INT (GH-142926)
LloydZ [Thu, 18 Dec 2025 18:25:36 +0000 (02:25 +0800)] 
gh-134584: Eliminate redundant refcounting from _BINARY_OP_SUBSCR_LIST_INT (GH-142926)

2 weeks agogh-129068: Make range iterators thread-safe (gh-142886)
Sam Gross [Thu, 18 Dec 2025 18:11:51 +0000 (13:11 -0500)] 
gh-129068: Make range iterators thread-safe (gh-142886)

Now that we specialize range iteration in the interpreter for the common
case where the iterator has only one reference, there's not a
significant performance cost to making the iteration thread-safe.

2 weeks agogh-142890: remove unnecessary interp parameter from dict functions and `_PyDict_Notif...
Kumar Aditya [Thu, 18 Dec 2025 17:18:56 +0000 (22:48 +0530)] 
gh-142890: remove unnecessary interp parameter from dict functions and `_PyDict_NotifyEvent` (#142923)

2 weeks agogh-142681: Move NormalizationTest-3.2.0.txt to more safe place. (GH-142935)
Serhiy Storchaka [Thu, 18 Dec 2025 17:04:28 +0000 (19:04 +0200)] 
gh-142681: Move NormalizationTest-3.2.0.txt to more safe place. (GH-142935)

2 weeks agoGH-142513: Reimplement executor management (GH-142931)
Mark Shannon [Thu, 18 Dec 2025 16:43:44 +0000 (16:43 +0000)] 
GH-142513: Reimplement executor management (GH-142931)

* Invalidating an executor does not cause arbitrary code to run
* Executors are only freed at safe points

2 weeks agogh-142419: Add mmap.set_name method for user custom annotation (gh-142480)
Donghee Na [Thu, 18 Dec 2025 14:33:49 +0000 (23:33 +0900)] 
gh-142419: Add mmap.set_name method for user custom annotation (gh-142480)

2 weeks agogh-76007: Deprecate `VERSION` in `xml.etree.ElementTree` & `version` in `xml.sax...
Hugo van Kemenade [Thu, 18 Dec 2025 14:22:23 +0000 (16:22 +0200)] 
gh-76007: Deprecate `VERSION` in `xml.etree.ElementTree` & `version` in `xml.sax.expatreader` & `xml.sax.handler` (#142898)

2 weeks agoFix typo in `format_string` docstring (GH-136742)
Max R [Thu, 18 Dec 2025 13:43:19 +0000 (08:43 -0500)] 
Fix typo in `format_string` docstring (GH-136742)

2 weeks agogh-142784: make the asyncio REPL call `loop.close()` at exit (#142785)
Bartosz Sławecki [Thu, 18 Dec 2025 13:00:12 +0000 (14:00 +0100)] 
gh-142784: make the asyncio REPL call `loop.close()` at exit (#142785)

2 weeks agogh-124098: Fix incorrect inclusion of handler methods without protocol prefix in...
MonadChains [Thu, 18 Dec 2025 12:50:05 +0000 (13:50 +0100)] 
gh-124098: Fix incorrect inclusion of handler methods without protocol prefix in OpenerDirector (GH-136873)

2 weeks agogh-134584: Remove redundant refcount from _BINARY_OP_ADD_UNICODE (gh-142825)
Donghee Na [Thu, 18 Dec 2025 12:33:18 +0000 (21:33 +0900)] 
gh-134584: Remove redundant refcount from _BINARY_OP_ADD_UNICODE (gh-142825)

2 weeks agogh-137063: Document that ast node types replaced by Constant are no longer available...
James [Thu, 18 Dec 2025 12:17:42 +0000 (07:17 -0500)] 
gh-137063: Document that ast node types replaced by Constant are no longer available (#137064)

2 weeks agogh-138122: Improve bytecode panel (#142910)
ivonastojanovic [Thu, 18 Dec 2025 11:43:39 +0000 (11:43 +0000)] 
gh-138122: Improve bytecode panel (#142910)

The bytecode panel appears when a user generates a heatmap with
--opcodes and clicks the button to unfold a line and display the
bytecode instructions. Currently, an empty space appears on the
left where the line number, self, and total columns are displayed.
This area should instead extend those columns, rather than leaving
a gap.

2 weeks agogh-139757: Treat call specially in JIT assembly backend optimizer on x86-64 and AArch...
Ken Jin [Wed, 17 Dec 2025 22:47:47 +0000 (06:47 +0800)] 
gh-139757: Treat call specially in JIT assembly backend optimizer on x86-64 and AArch64 (GH-142907)

Co-authored-by: Savannah Ostrowski <savannah@python.org>
2 weeks agogh-129748: Remove TSan suppression for mi_block_set_nextx (gh-142887)
Sam Gross [Wed, 17 Dec 2025 20:27:04 +0000 (15:27 -0500)] 
gh-129748: Remove TSan suppression for mi_block_set_nextx (gh-142887)

The function was already changed to use a relaxed atomic store in gh-134238.

2 weeks agoGH-100964: Fix reference cycle in exhausted generator frames (#141112)
Savannah Ostrowski [Wed, 17 Dec 2025 19:21:45 +0000 (11:21 -0800)] 
GH-100964: Fix reference cycle in exhausted generator frames (#141112)

2 weeks agogh-142766: Clear frame when `generator.close()` is called (gh-142838)
Sam Gross [Wed, 17 Dec 2025 18:06:32 +0000 (13:06 -0500)] 
gh-142766: Clear frame when `generator.close()` is called (gh-142838)

2 weeks agogh-91048: Refactor common data into context object in Modules/_remote_debugging ...
Pablo Galindo Salgado [Wed, 17 Dec 2025 17:43:52 +0000 (17:43 +0000)] 
gh-91048: Refactor common data into context object in Modules/_remote_debugging (#142879)

2 weeks agogh-142849: Fix segfault in `executor_to_gv` (GH-142885)
Ken Jin [Wed, 17 Dec 2025 17:05:21 +0000 (01:05 +0800)] 
gh-142849: Fix segfault in `executor_to_gv` (GH-142885)

Fix segfault in `executor_to_gv`

2 weeks agogh-142873: Do not check for `PyContextVar_CheckExact` twice in `PyContextVar_Set...
sobolevn [Wed, 17 Dec 2025 16:41:36 +0000 (19:41 +0300)] 
gh-142873: Do not check for `PyContextVar_CheckExact` twice in `PyContextVar_Set` (#142874)

2 weeks agogh-142876: remove reference to thread in documentation of `asyncio.Queue.shutdown...
Damian Birchler [Wed, 17 Dec 2025 16:40:03 +0000 (17:40 +0100)] 
gh-142876: remove reference to thread in documentation of `asyncio.Queue.shutdown` (#142888)

2 weeks agogh-142225: Add PyABIInfo_VAR to to _testcapimodule & _testinternalcapi (GH-142833)
Petr Viktorin [Wed, 17 Dec 2025 15:33:09 +0000 (16:33 +0100)] 
gh-142225: Add PyABIInfo_VAR to to _testcapimodule & _testinternalcapi (GH-142833)

2 weeks agogh-138122: Validate base frame before caching in remote debugging frame cache (#142852)
Pablo Galindo Salgado [Wed, 17 Dec 2025 15:12:28 +0000 (15:12 +0000)] 
gh-138122: Validate base frame before caching in remote debugging frame cache (#142852)

2 weeks agogh-112127: Fix possible use-after-free in atexit.unregister() (GH-114092)
Benjamin Johnson [Wed, 17 Dec 2025 15:09:57 +0000 (07:09 -0800)] 
gh-112127: Fix possible use-after-free in atexit.unregister() (GH-114092)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
2 weeks agoUse other name for JIT contributor (#142877)
Ken Jin [Wed, 17 Dec 2025 14:21:02 +0000 (22:21 +0800)] 
Use other name for JIT contributor (#142877)

2 weeks agogh-142654: show the clear error message when sampling on an unknown PID in tachyon...
Keming [Wed, 17 Dec 2025 14:15:22 +0000 (22:15 +0800)] 
gh-142654: show the clear error message when sampling on an unknown PID in tachyon (#142655)

Co-authored-by: Pablo Galindo Salgado <pablogsal@gmail.com>
2 weeks agogh-139038: Add JIT What's New for 3.15 (#142845)
Savannah Ostrowski [Wed, 17 Dec 2025 12:14:44 +0000 (04:14 -0800)] 
gh-139038: Add JIT What's New for 3.15 (#142845)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Ken Jin <kenjin4096@gmail.com>
2 weeks agoGH-142621: JIT: Avoid memory load for symbols within 4GB on AArch64 (GH-142820)
Mark Shannon [Wed, 17 Dec 2025 12:07:07 +0000 (12:07 +0000)] 
GH-142621: JIT: Avoid memory load for symbols within 4GB on AArch64 (GH-142820)

2 weeks agogh-142859: Add `Tools/check-c-api-docs` to mypy check (#142860)
sobolevn [Wed, 17 Dec 2025 11:23:30 +0000 (14:23 +0300)] 
gh-142859: Add `Tools/check-c-api-docs` to mypy check (#142860)

2 weeks agogh-140374: Add glossary entries related to multithreading (#140375)
Lysandros Nikolaou [Wed, 17 Dec 2025 11:09:51 +0000 (12:09 +0100)] 
gh-140374: Add glossary entries related to multithreading (#140375)

---------

Co-authored-by: Daniele Parmeggiani <8658291+dpdani@users.noreply.github.com>
2 weeks agogh-139743: Avoid print twice verbose version for sqlite tests (GH-142850)
yihong [Wed, 17 Dec 2025 09:44:47 +0000 (17:44 +0800)] 
gh-139743: Avoid print twice verbose version for sqlite tests (GH-142850)

Signed-off-by: yihong0618 <zouzou0208@gmail.com>
2 weeks agogh-142783: Fix possible use after free in zoneinfo module (GH-142790)
wangxiaolei [Wed, 17 Dec 2025 08:35:08 +0000 (16:35 +0800)] 
gh-142783: Fix possible use after free in zoneinfo module (GH-142790)

2 weeks agogh-142752: add more thread safety tests for mock (#142791)
Kumar Aditya [Wed, 17 Dec 2025 07:47:12 +0000 (13:17 +0530)] 
gh-142752: add more thread safety tests for mock (#142791)

2 weeks agogh-142836: Avoid /proc fd pipes on Solaris (#142853)
Jason R. Coombs [Wed, 17 Dec 2025 07:38:00 +0000 (02:38 -0500)] 
gh-142836: Avoid /proc fd pipes on Solaris (#142853)

2 weeks agogh-142543: Mark tracer functions as Py_NO_INLINE (GH-142846)
Ken Jin [Wed, 17 Dec 2025 00:12:32 +0000 (08:12 +0800)] 
gh-142543: Mark tracer functions as Py_NO_INLINE (GH-142846)

2 weeks agogh-134584: Eliminate redundant refcounting from `_STORE_ATTR_WITH_HINT` (GH-142767)
Nadeshiko Manju [Tue, 16 Dec 2025 22:21:04 +0000 (07:21 +0900)] 
gh-134584: Eliminate redundant refcounting from `_STORE_ATTR_WITH_HINT` (GH-142767)

Signed-off-by: Manjusaka <me@manjusaka.me>
2 weeks agogh-138122: Update Tachyon dark theme colors (#142841)
ivonastojanovic [Tue, 16 Dec 2025 20:58:56 +0000 (20:58 +0000)] 
gh-138122: Update Tachyon dark theme colors (#142841)

2 weeks agogh-134584: Eliminate redundant refcounting from `_LOAD_ATTR_INSTANCE_VALUE` (GH-142769)
Nadeshiko Manju [Tue, 16 Dec 2025 20:39:20 +0000 (05:39 +0900)] 
gh-134584: Eliminate redundant refcounting from `_LOAD_ATTR_INSTANCE_VALUE` (GH-142769)

Signed-off-by: Manjusaka <me@manjusaka.me>
2 weeks agoGH-142629: JIT: Fix out of bounds memory read in lltrace (GH-142821)
Mark Shannon [Tue, 16 Dec 2025 19:57:15 +0000 (19:57 +0000)] 
GH-142629: JIT: Fix out of bounds memory read in lltrace (GH-142821)

JIT: Fix out of bounds memory read in lltrace

2 weeks agoMake RESUME monitoring more readable and robust (GH-142136)
Gabriele N. Tornetta [Tue, 16 Dec 2025 16:23:27 +0000 (16:23 +0000)] 
Make RESUME monitoring more readable and robust (GH-142136)

2 weeks agogh-142495: Make `defaultdict` keep existed value when racing with `__missing__` ...
Edward Xu [Tue, 16 Dec 2025 15:04:20 +0000 (23:04 +0800)] 
gh-142495: Make `defaultdict` keep existed value when racing with `__missing__` (GH-142668)

2 weeks agoPost 3.15.0a3
Hugo van Kemenade [Tue, 16 Dec 2025 14:31:52 +0000 (16:31 +0200)] 
Post 3.15.0a3

2 weeks agoPython 3.15.0a3 v3.15.0a3
Hugo van Kemenade [Tue, 16 Dec 2025 12:25:53 +0000 (14:25 +0200)] 
Python 3.15.0a3

2 weeks agogh-142754: Ensure that Element & Attr instances have the ownerDocument attribute...
Petr Viktorin [Tue, 16 Dec 2025 12:20:48 +0000 (13:20 +0100)] 
gh-142754: Ensure that Element & Attr instances have the ownerDocument attribute (#142794)

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
2 weeks agogh-76007: Deprecate `__version__` attribute in `wsgiref.simple_server` (#142675)
Hugo van Kemenade [Tue, 16 Dec 2025 12:08:51 +0000 (14:08 +0200)] 
gh-76007: Deprecate `__version__` attribute in `wsgiref.simple_server` (#142675)

2 weeks agogh-142019: Add description about the exponent of result formatted with presentation...
1nftf [Tue, 16 Dec 2025 11:56:12 +0000 (19:56 +0800)] 
gh-142019: Add description about the exponent of result formatted with presentation type 'e' (#142084)

2 weeks agogh-83926: BlockingIOError characters_written is byte count (#141215)
Cody Maloney [Tue, 16 Dec 2025 11:53:56 +0000 (03:53 -0800)] 
gh-83926: BlockingIOError characters_written is byte count (#141215)

2 weeks agogh-119786: Remove mention of `_PyThreadState_BumpFramePointer` from `InternalDocs...
Mikhail Efimov [Tue, 16 Dec 2025 11:49:14 +0000 (14:49 +0300)] 
gh-119786: Remove mention of `_PyThreadState_BumpFramePointer` from `InternalDocs/interpreter.md` (#141816)

Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
2 weeks agogh-141218: Fix inaccurate object comparison documentation (#141221)
Mohsin Mehmood [Tue, 16 Dec 2025 11:46:42 +0000 (16:46 +0500)] 
gh-141218: Fix inaccurate object comparison documentation (#141221)

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
2 weeks agoRemove duplicate content in `Mapping types - dict` documentation (#141036)
Owain Davies [Tue, 16 Dec 2025 11:46:13 +0000 (11:46 +0000)] 
Remove duplicate content in `Mapping types - dict` documentation (#141036)

2 weeks agoCorrect Glossary key function example to use str.casefold instead of str.lower (...
Cameron Beck [Tue, 16 Dec 2025 11:44:12 +0000 (06:44 -0500)] 
Correct Glossary key function example to use str.casefold instead of str.lower (#140316)

2 weeks agodecimal docs: specification link and examples (#128698)
Sergey B Kirpichev [Tue, 16 Dec 2025 11:41:59 +0000 (14:41 +0300)] 
decimal docs: specification link and examples (#128698)

Co-authored-by: RUANG (James Roy) <longjinyii@outlook.com>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
2 weeks ago gh-106318: Add examples for str.ljust() method (#142719)
Adorilson Bezerra [Tue, 16 Dec 2025 11:39:20 +0000 (11:39 +0000)] 
 gh-106318: Add examples for str.ljust() method  (#142719)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
2 weeks agoClarify that PyStructSequence is different from collections.namedtuple (#142626)
Petr Viktorin [Tue, 16 Dec 2025 11:38:11 +0000 (12:38 +0100)] 
Clarify that PyStructSequence is different from collections.namedtuple (#142626)

2 weeks agogh-130536: Add details to `os.path` documentation (#130557)
Arthur Wigo [Tue, 16 Dec 2025 11:29:52 +0000 (03:29 -0800)] 
gh-130536: Add details to `os.path` documentation (#130557)

2 weeks agogh-85204: Improve `locale.setlocale` example (#132683)
Stan Ulbrych [Tue, 16 Dec 2025 11:26:33 +0000 (11:26 +0000)] 
gh-85204: Improve `locale.setlocale` example (#132683)

2 weeks agogh-124864: Extends smtplib documentation on ESMTP options format (#132547)
Patrick R [Tue, 16 Dec 2025 11:21:38 +0000 (12:21 +0100)] 
gh-124864: Extends smtplib documentation on ESMTP options format (#132547)

2 weeks agogh-139320: Cover exception chaining in the docs of `contextmanager.__exit__` (GH...
Bartosz Sławecki [Tue, 16 Dec 2025 10:15:37 +0000 (11:15 +0100)] 
gh-139320: Cover exception chaining in the docs of `contextmanager.__exit__` (GH-140169)

2 weeks agogh-142595: Amend be5e0dcdedb (fix NULL pointer dereference) (GH-142775)
Sergey B Kirpichev [Tue, 16 Dec 2025 08:52:20 +0000 (11:52 +0300)] 
gh-142595: Amend be5e0dcdedb (fix NULL pointer dereference) (GH-142775)

3 weeks agoGH-134584: Remove redundant refcount from `_STORE_ATTR_SLOT` (#142729)
Savannah Ostrowski [Mon, 15 Dec 2025 23:18:44 +0000 (15:18 -0800)] 
GH-134584: Remove redundant refcount from `_STORE_ATTR_SLOT` (#142729)

3 weeks agogh-142737: Handle lost `io.open` in `_Py_FindSourceFile` (GH-142747)
Bartosz Sławecki [Mon, 15 Dec 2025 22:58:50 +0000 (23:58 +0100)] 
gh-142737: Handle lost `io.open` in `_Py_FindSourceFile` (GH-142747)

3 weeks agogh-134584: JIT: Eliminate redundant refcount ops for X_INT (GH-142765)
Ken Jin [Mon, 15 Dec 2025 22:22:18 +0000 (06:22 +0800)] 
gh-134584: JIT: Eliminate redundant refcount ops for X_INT (GH-142765)

3 weeks agogh-85222: Document the global start method side effect in multiprocessing (GH-136426)
AN Long [Mon, 15 Dec 2025 22:12:52 +0000 (07:12 +0900)] 
gh-85222: Document the global start method side effect in multiprocessing (GH-136426)

* Document the ctx parameter in some types in multiprocessing.
* Reduce duplication while still linking to the central explanation from API points with the side effect.

Co-authored-by: Carol Willing <carolcode@willingconsulting.com>
Co-authored-by: R Chintan Meher <meherrihaan@gmail.com>
3 weeks agoAdd Fidget-Spinner to more JIT CODEOWNERS (GH-142768)
Ken Jin [Mon, 15 Dec 2025 21:50:42 +0000 (05:50 +0800)] 
Add Fidget-Spinner to more JIT CODEOWNERS (GH-142768)

3 weeks agogh-134584: Eliminate redundant refcounting from `_STORE_ATTR_INSTANCE_VALUE` (GH...
Nadeshiko Manju [Mon, 15 Dec 2025 20:17:12 +0000 (04:17 +0800)] 
gh-134584: Eliminate redundant refcounting from `_STORE_ATTR_INSTANCE_VALUE` (GH-142759)

Signed-off-by: Manjusaka <me@manjusaka.me>
3 weeks agogh-134584: Remove custom float decref ops (GH-142576)
Ken Jin [Mon, 15 Dec 2025 19:38:58 +0000 (03:38 +0800)] 
gh-134584: Remove custom float decref ops (GH-142576)

3 weeks agogh-141081: Revert "Add a `.gitignore` file to `__pycache__` folders (#141162)" (...
Hugo van Kemenade [Mon, 15 Dec 2025 19:27:06 +0000 (21:27 +0200)] 
gh-141081: Revert "Add a `.gitignore` file to `__pycache__` folders (#141162)" (#142758)

3 weeks agoGH-142718: JIT: Fix crash due to incorrect caching on side exits when exiting jitted...
Mark Shannon [Mon, 15 Dec 2025 19:01:29 +0000 (19:01 +0000)] 
GH-142718: JIT: Fix crash due to incorrect caching on side exits when exiting jitted code. (GH-142762)

JIT: Fix crash due to incorrect caching on side exits when exiting jitted code.

* Make sure that stack is in correct state at side exits with TOS cached values
* Simplify choice of cached items for side exits

3 weeks agogh-116738: Make _bz2 module thread-safe (gh-142756)
Alper [Mon, 15 Dec 2025 17:47:04 +0000 (09:47 -0800)] 
gh-116738: Make _bz2 module thread-safe (gh-142756)

Make the attributes in _bz2 module thread-safe on the free-threading build.
Attributes (eof, needs_input, unused_data) are now stored atomically or
accessed via mutex-protected getters.

3 weeks agogh-142472: Clean-up _PyStackRef functions (gh-142479)
Sam Gross [Mon, 15 Dec 2025 17:03:49 +0000 (12:03 -0500)] 
gh-142472: Clean-up _PyStackRef functions (gh-142479)

This combines most _PyStackRef functions and macros between the free
threaded and default builds.

- Remove Py_TAG_DEFERRED (same as Py_TAG_REFCNT)
- Remove PyStackRef_IsDeferred (same as !PyStackRef_RefcountOnObject)

3 weeks agogh-134584: Eliminate redundant refcounting from _STORE_SUBSCR_DICT (GH-142712)
Donghee Na [Mon, 15 Dec 2025 16:42:32 +0000 (01:42 +0900)] 
gh-134584: Eliminate redundant refcounting from _STORE_SUBSCR_DICT (GH-142712)

Co-authored-by: Ken Jin <kenjin4096@gmail.com>
3 weeks agogh-134584: Eliminate redundant refcounting from _CALL_LIST_APPEND (GH-142711)
Nadeshiko Manju [Mon, 15 Dec 2025 15:49:36 +0000 (23:49 +0800)] 
gh-134584: Eliminate redundant refcounting from _CALL_LIST_APPEND (GH-142711)

Signed-off-by: Manjusaka <me@manjusaka.me>
Co-authored-by: Ken Jin <kenjin4096@gmail.com>
3 weeks agogh-142466: Pixi package definitions for downstream use (#142469)
Lucas Colley [Mon, 15 Dec 2025 15:04:16 +0000 (15:04 +0000)] 
gh-142466: Pixi package definitions for downstream use (#142469)

* WIP: ENH: Pixi package definitions for downstream development

[skip ci]

* linux-64 support

* tidy gitignore

* respond to review
- switch cases on `PYTHON_VARIANT`
- remove `minor_version` by using `python3`
- remove runtime-only asan options

* README updates

* use `.md` to preview rendering

* Apply suggestions from code review

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
* Apply suggestion from @FFY00

Co-authored-by: Filipe Laíns <filipe.lains@gmail.com>
* Apply suggestion from @FFY00

Co-authored-by: Filipe Laíns <filipe.lains@gmail.com>
* Apply suggestion from @FFY00

Co-authored-by: Filipe Laíns <filipe.lains@gmail.com>
* Apply suggestion from @lucascolley

---------

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Filipe Laíns <filipe.lains@gmail.com>
3 weeks agoMove doc on structure from devguide to `InternalDocs` (GH-142237)
Stan Ulbrych [Mon, 15 Dec 2025 14:19:02 +0000 (14:19 +0000)] 
Move doc on structure from devguide to `InternalDocs` (GH-142237)

Co-Authored-By: Paul Ross <apaulross@gmail.com>
Co-Authored-By: Carol Willing <carolcode@willingconsulting.com>
Co-Authored-By: Hugo van Kemenade <hugovk@users.noreply.github.com>
Co-Authored-By: Ezio Melotti <ezio.melotti@gmail.com>
Co-Authored-By: Adam Turner <9087854+aa-turner@users.noreply.github.com>
3 weeks agogh-142020: ctypes docs: Note that find_library relies on the programs it runs (GH...
Petr Viktorin [Mon, 15 Dec 2025 14:15:22 +0000 (15:15 +0100)] 
gh-142020: ctypes docs: Note that find_library relies on the programs it runs (GH-142134)

3 weeks agogh-142594: fix by property calls io.TextIOWrapper.detach (GH-142706)
yihong [Mon, 15 Dec 2025 14:13:58 +0000 (22:13 +0800)] 
gh-142594: fix by property calls io.TextIOWrapper.detach (GH-142706)

Signed-off-by: yihong0618 <zouzou0208@gmail.com>
3 weeks agogh-142217: Recommend PyUnicode_InternFromString() to replace _PyUnicode_FromId()...
Victor Stinner [Mon, 15 Dec 2025 13:25:30 +0000 (14:25 +0100)] 
gh-142217: Recommend PyUnicode_InternFromString() to replace _PyUnicode_FromId() (GH-142746)

3 weeks agogh-142029: Raise `ModuleNotFoundError` instead of crashing on nonexsistent module...
dr-carlos [Mon, 15 Dec 2025 12:20:19 +0000 (22:50 +1030)] 
gh-142029: Raise `ModuleNotFoundError` instead of crashing on nonexsistent module name given to `create_builtin()` (#142054)

Co-authored-by: Brett Cannon <brett@python.org>
Co-authored-by: Victor Stinner <vstinner@python.org>
3 weeks agogh-138122: Add --subprocesses flag to profile child processes in tachyon (#142636)
Pablo Galindo Salgado [Mon, 15 Dec 2025 12:11:40 +0000 (12:11 +0000)] 
gh-138122: Add --subprocesses flag to profile child processes in tachyon (#142636)

3 weeks agogh-139871: Optimize bytearray construction with encoding (#142243)
Cody Maloney [Mon, 15 Dec 2025 12:10:31 +0000 (04:10 -0800)] 
gh-139871: Optimize bytearray construction with encoding (#142243)

When a `str` is encoded in `bytearray.__init__` the encoder tends to
create a new unique bytes object. Rather than allocate new memory and
copy the bytes use the already created bytes object as bytearray
backing. The bigger the `str` the bigger the saving.

Mean +- std dev: [main_encoding] 497 us +- 9 us -> [encoding] 14.2 us +- 0.3 us: 34.97x faster

```python
import pyperf

runner = pyperf.Runner()

runner.timeit(
    name="encode",
    setup="a = 'a' * 1_000_000",
    stmt="bytearray(a, encoding='utf8')")
```

3 weeks agogh-142651: make `Mock.call_count` thread-safe (#142656)
chaope [Mon, 15 Dec 2025 11:43:15 +0000 (06:43 -0500)] 
gh-142651: make `Mock.call_count` thread-safe (#142656)