Mailman 3 November 2025 - Python-checkins

[3.14] gh-142067: Add missing default value for param in `multiprocessing.Pipe`'s doc (GH-142109) (#142120)
by gpshead Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/4dbf8e14ba6a03705dfd05fcb8036e2db2… commit: 4dbf8e14ba6a03705dfd05fcb8036e2db27d0c18 branch: 3.14 author: Miss Islington (bot) <31488909+miss-islington(a)users.noreply.github.com> committer: gpshead <68491+gpshead(a)users.noreply.github.com> date: 2025-11-30T21:15:39Z summary: [3.14] gh-142067: Add missing default value for param in `multiprocessing.Pipe`'s doc (GH-142109) (#142120) gh-142067: Add missing default value for param in `multiprocessing.Pipe`'s doc (GH-142109) (cherry picked from commit 229ed3dd1f97b2f87629a240b90eddba5ded67bf) Co-authored-by: flovent <flbven(a)protonmail.com> files: M Doc/library/multiprocessing.rst diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst index cbc98b256a93a4..b297001f2b544e 100644 --- a/Doc/library/multiprocessing.rst +++ b/Doc/library/multiprocessing.rst @@ -890,7 +890,7 @@ For an example of the usage of queues for interprocess communication see :ref:`multiprocessing-examples`. -.. function:: Pipe([duplex]) +.. function:: Pipe(duplex=True) Returns a pair ``(conn1, conn2)`` of :class:`~multiprocessing.connection.Connection` objects representing the

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gh-142067: Add missing default value for param in `multiprocessing.Pipe`'s doc (GH-142109)
by gpshead Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/229ed3dd1f97b2f87629a240b90eddba5d… commit: 229ed3dd1f97b2f87629a240b90eddba5ded67bf branch: main author: flovent <flbven(a)protonmail.com> committer: gpshead <68491+gpshead(a)users.noreply.github.com> date: 2025-11-30T13:10:01-08:00 summary: gh-142067: Add missing default value for param in `multiprocessing.Pipe`'s doc (GH-142109) files: M Doc/library/multiprocessing.rst diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst index cbc98b256a93a4..b297001f2b544e 100644 --- a/Doc/library/multiprocessing.rst +++ b/Doc/library/multiprocessing.rst @@ -890,7 +890,7 @@ For an example of the usage of queues for interprocess communication see :ref:`multiprocessing-examples`. -.. function:: Pipe([duplex]) +.. function:: Pipe(duplex=True) Returns a pair ``(conn1, conn2)`` of :class:`~multiprocessing.connection.Connection` objects representing the

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[3.14] gh-133146: Add the old public `get_value` method to documentation and refactor code. (GH-133301) (#142110)
by gpshead Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/b95d16a338d23e52a4aeb46809fcf8a145… commit: b95d16a338d23e52a4aeb46809fcf8a145bd38b2 branch: 3.14 author: Hugo van Kemenade <1324225+hugovk(a)users.noreply.github.com> committer: gpshead <68491+gpshead(a)users.noreply.github.com> date: 2025-11-30T13:06:56-08:00 summary: [3.14] gh-133146: Add the old public `get_value` method to documentation and refactor code. (GH-133301) (#142110) also uses it within the internals in a few places. (cherry picked from commit db098a475a47b16d25c88d95dbcf0c6572c68576) Co-authored-by: Duprat <yduprat(a)gmail.com> files: M Doc/library/multiprocessing.rst M Lib/multiprocessing/queues.py M Lib/multiprocessing/synchronize.py diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst index 714207cb0aefcd..cbc98b256a93a4 100644 --- a/Doc/library/multiprocessing.rst +++ b/Doc/library/multiprocessing.rst @@ -1577,12 +1577,22 @@ object -- see :ref:`multiprocessing-managers`. A solitary difference from its close analog exists: its ``acquire`` method's first argument is named *block*, as is consistent with :meth:`Lock.acquire`. + + .. method:: get_value() + + Return the current value of semaphore. + + Note that this may raise :exc:`NotImplementedError` on platforms like + macOS where ``sem_getvalue()`` is not implemented. + + .. method:: locked() Return a boolean indicating whether this object is locked right now. .. versionadded:: 3.14 + .. note:: On macOS, ``sem_timedwait`` is unsupported, so calling ``acquire()`` with diff --git a/Lib/multiprocessing/queues.py b/Lib/multiprocessing/queues.py index 925f043900004e..981599acf5ef26 100644 --- a/Lib/multiprocessing/queues.py +++ b/Lib/multiprocessing/queues.py @@ -121,7 +121,7 @@ def get(self, block=True, timeout=None): def qsize(self): # Raises NotImplementedError on Mac OSX because of broken sem_getvalue() - return self._maxsize - self._sem._semlock._get_value() + return self._maxsize - self._sem.get_value() def empty(self): return not self._poll() diff --git a/Lib/multiprocessing/synchronize.py b/Lib/multiprocessing/synchronize.py index 30425047e9801a..9188114ae284c7 100644 --- a/Lib/multiprocessing/synchronize.py +++ b/Lib/multiprocessing/synchronize.py @@ -135,11 +135,16 @@ def __init__(self, value=1, *, ctx): SemLock.__init__(self, SEMAPHORE, value, SEM_VALUE_MAX, ctx=ctx) def get_value(self): + '''Returns current value of Semaphore. + + Raises NotImplementedError on Mac OSX + because of broken sem_getvalue(). + ''' return self._semlock._get_value() def __repr__(self): try: - value = self._semlock._get_value() + value = self.get_value() except Exception: value = 'unknown' return '<%s(value=%s)>' % (self.__class__.__name__, value) @@ -155,7 +160,7 @@ def __init__(self, value=1, *, ctx): def __repr__(self): try: - value = self._semlock._get_value() + value = self.get_value() except Exception: value = 'unknown' return '<%s(value=%s, maxvalue=%s)>' % \ @@ -247,8 +252,8 @@ def _make_methods(self): def __repr__(self): try: - num_waiters = (self._sleeping_count._semlock._get_value() - - self._woken_count._semlock._get_value()) + num_waiters = (self._sleeping_count.get_value() - + self._woken_count.get_value()) except Exception: num_waiters = 'unknown' return '<%s(%s, %s)>' % (self.__class__.__name__, self._lock, num_waiters)

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[3.13] Improve clarity in tutorial introduction (GH-140669) (#142113)
by hugovk Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/42c6e75ba1701a6fec81d1f781ce234dcd… commit: 42c6e75ba1701a6fec81d1f781ce234dcded986a branch: 3.13 author: Miss Islington (bot) <31488909+miss-islington(a)users.noreply.github.com> committer: hugovk <1324225+hugovk(a)users.noreply.github.com> date: 2025-11-30T12:53:10Z summary: [3.13] Improve clarity in tutorial introduction (GH-140669) (#142113) Co-authored-by: Thierry Martos <81799048+ThierryMT(a)users.noreply.github.com> files: M Doc/tutorial/introduction.rst diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst index fb491149793cf7..deabac5253051c 100644 --- a/Doc/tutorial/introduction.rst +++ b/Doc/tutorial/introduction.rst @@ -49,7 +49,7 @@ primary prompt, ``>>>``. (It shouldn't take long.) Numbers ------- -The interpreter acts as a simple calculator: you can type an expression at it +The interpreter acts as a simple calculator: you can type an expression into it and it will write the value. Expression syntax is straightforward: the operators ``+``, ``-``, ``*`` and ``/`` can be used to perform arithmetic; parentheses (``()``) can be used for grouping.

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[3.14] Improve clarity in tutorial introduction (GH-140669) (#142112)
by hugovk Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/3824ad0286e0e9634e38dfd2b0c57e4b37… commit: 3824ad0286e0e9634e38dfd2b0c57e4b37c67337 branch: 3.14 author: Miss Islington (bot) <31488909+miss-islington(a)users.noreply.github.com> committer: hugovk <1324225+hugovk(a)users.noreply.github.com> date: 2025-11-30T12:53:05Z summary: [3.14] Improve clarity in tutorial introduction (GH-140669) (#142112) Co-authored-by: Thierry Martos <81799048+ThierryMT(a)users.noreply.github.com> files: M Doc/tutorial/introduction.rst diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst index fb491149793cf7..deabac5253051c 100644 --- a/Doc/tutorial/introduction.rst +++ b/Doc/tutorial/introduction.rst @@ -49,7 +49,7 @@ primary prompt, ``>>>``. (It shouldn't take long.) Numbers ------- -The interpreter acts as a simple calculator: you can type an expression at it +The interpreter acts as a simple calculator: you can type an expression into it and it will write the value. Expression syntax is straightforward: the operators ``+``, ``-``, ``*`` and ``/`` can be used to perform arithmetic; parentheses (``()``) can be used for grouping.

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Improve clarity in tutorial introduction (#140669)
by hugovk Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/cd4d0ae75c0a132f4fdc68ad0d04389893… commit: cd4d0ae75c0a132f4fdc68ad0d043898931ae999 branch: main author: Thierry Martos <81799048+ThierryMT(a)users.noreply.github.com> committer: hugovk <1324225+hugovk(a)users.noreply.github.com> date: 2025-11-30T12:47:31Z summary: Improve clarity in tutorial introduction (#140669) files: M Doc/tutorial/introduction.rst diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst index fb491149793cf7..deabac5253051c 100644 --- a/Doc/tutorial/introduction.rst +++ b/Doc/tutorial/introduction.rst @@ -49,7 +49,7 @@ primary prompt, ``>>>``. (It shouldn't take long.) Numbers ------- -The interpreter acts as a simple calculator: you can type an expression at it +The interpreter acts as a simple calculator: you can type an expression into it and it will write the value. Expression syntax is straightforward: the operators ``+``, ``-``, ``*`` and ``/`` can be used to perform arithmetic; parentheses (``()``) can be used for grouping.

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[3.14] gh-140373: Correctly emit `PY_UNWIND` event when generator is closed (GH-140767) (#140816)
by hugovk Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/52731c4e62f6dcc15dffc0d98796c43763… commit: 52731c4e62f6dcc15dffc0d98796c43763b7bcc2 branch: 3.14 author: Miss Islington (bot) <31488909+miss-islington(a)users.noreply.github.com> committer: hugovk <1324225+hugovk(a)users.noreply.github.com> date: 2025-11-30T14:35:14+02:00 summary: [3.14] gh-140373: Correctly emit `PY_UNWIND` event when generator is closed (GH-140767) (#140816) Co-authored-by: Mikhail Efimov <efimov.mikhail(a)gmail.com> files: A Misc/NEWS.d/next/Core_and_Builtins/2025-10-29-20-59-10.gh-issue-140373.-uoaPP.rst M Include/internal/pycore_ceval.h M Lib/test/test_monitoring.py M Lib/test/test_sys_setprofile.py M Objects/genobject.c M Python/ceval.c diff --git a/Include/internal/pycore_ceval.h b/Include/internal/pycore_ceval.h index cf5ad528217eab..89504f6bfbbfb7 100644 --- a/Include/internal/pycore_ceval.h +++ b/Include/internal/pycore_ceval.h @@ -296,6 +296,7 @@ PyAPI_FUNC(PyObject *) _PyEval_ImportName(PyThreadState *, _PyInterpreterFrame * PyAPI_FUNC(PyObject *)_PyEval_MatchClass(PyThreadState *tstate, PyObject *subject, PyObject *type, Py_ssize_t nargs, PyObject *kwargs); PyAPI_FUNC(PyObject *)_PyEval_MatchKeys(PyThreadState *tstate, PyObject *map, PyObject *keys); PyAPI_FUNC(void) _PyEval_MonitorRaise(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr); +PyAPI_FUNC(bool) _PyEval_NoToolsForUnwind(PyThreadState *tstate); PyAPI_FUNC(int) _PyEval_UnpackIterableStackRef(PyThreadState *tstate, PyObject *v, int argcnt, int argcntafter, _PyStackRef *sp); PyAPI_FUNC(void) _PyEval_FrameClearAndPop(PyThreadState *tstate, _PyInterpreterFrame *frame); PyAPI_FUNC(PyObject **) _PyObjectArray_FromStackRefArray(_PyStackRef *input, Py_ssize_t nargs, PyObject **scratch); diff --git a/Lib/test/test_monitoring.py b/Lib/test/test_monitoring.py index 98276a8ccaa610..de658c597a197d 100644 --- a/Lib/test/test_monitoring.py +++ b/Lib/test/test_monitoring.py @@ -1079,6 +1079,25 @@ def f(): self.assertEqual(events, expected) + # gh-140373 + def test_gen_unwind(self): + def gen(): + yield 1 + + def f(): + g = gen() + next(g) + g.close() + + recorders = ( + UnwindRecorder, + ) + events = self.get_events(f, TEST_TOOL, recorders) + expected = [ + ("unwind", GeneratorExit, "gen"), + ] + self.assertEqual(events, expected) + class LineRecorder: event_type = E.LINE diff --git a/Lib/test/test_sys_setprofile.py b/Lib/test/test_sys_setprofile.py index 345c022bd2374c..a22b728b569419 100644 --- a/Lib/test/test_sys_setprofile.py +++ b/Lib/test/test_sys_setprofile.py @@ -272,6 +272,8 @@ def g(p): self.check_events(g, [(1, 'call', g_ident, None), (2, 'call', f_ident, None), (2, 'return', f_ident, 0), + (2, 'call', f_ident, None), + (2, 'return', f_ident, None), (1, 'return', g_ident, None), ], check_args=True) diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-29-20-59-10.gh-issue-140373.-uoaPP.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-29-20-59-10.gh-issue-140373.-uoaPP.rst new file mode 100644 index 00000000000000..c9a97037920fda --- /dev/null +++ b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-29-20-59-10.gh-issue-140373.-uoaPP.rst @@ -0,0 +1,2 @@ +Correctly emit ``PY_UNWIND`` event when generator object is closed. Patch by +Mikhail Efimov. diff --git a/Objects/genobject.c b/Objects/genobject.c index f429bc47678fed..575752fc84002a 100644 --- a/Objects/genobject.c +++ b/Objects/genobject.c @@ -407,11 +407,12 @@ gen_close(PyObject *self, PyObject *args) } _PyInterpreterFrame *frame = &gen->gi_iframe; if (is_resume(frame->instr_ptr)) { + bool no_unwind_tools = _PyEval_NoToolsForUnwind(_PyThreadState_GET()); /* We can safely ignore the outermost try block * as it is automatically generated to handle * StopIteration. */ int oparg = frame->instr_ptr->op.arg; - if (oparg & RESUME_OPARG_DEPTH1_MASK) { + if (oparg & RESUME_OPARG_DEPTH1_MASK && no_unwind_tools) { // RESUME after YIELD_VALUE and exception depth is 1 assert((oparg & RESUME_OPARG_LOCATION_MASK) != RESUME_AT_FUNC_START); gen->gi_frame_state = FRAME_COMPLETED; diff --git a/Python/ceval.c b/Python/ceval.c index 4b1e7abe66dfad..faca6fe81b977a 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -2545,6 +2545,10 @@ monitor_unwind(PyThreadState *tstate, do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_PY_UNWIND); } +bool +_PyEval_NoToolsForUnwind(PyThreadState *tstate) { + return no_tools_for_global_event(tstate, PY_MONITORING_EVENT_PY_UNWIND); +} static int monitor_handled(PyThreadState *tstate,

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[3.13] gh-136063: fix quadratic-complexity parsing in `email.message._parseparam` (GH-136072) (#140828)
by hugovk Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/b34ecec682db8be67ef9b1b969499e552b… commit: b34ecec682db8be67ef9b1b969499e552b0c0139 branch: 3.13 author: Miss Islington (bot) <31488909+miss-islington(a)users.noreply.github.com> committer: hugovk <1324225+hugovk(a)users.noreply.github.com> date: 2025-11-30T14:34:22+02:00 summary: [3.13] gh-136063: fix quadratic-complexity parsing in `email.message._parseparam` (GH-136072) (#140828) Co-authored-by: Bénédikt Tran <10796600+picnixz(a)users.noreply.github.com> files: A Misc/NEWS.d/next/Security/2025-06-28-13-23-53.gh-issue-136063.aGk0Jv.rst M Lib/email/message.py M Lib/test/test_email/test_email.py diff --git a/Lib/email/message.py b/Lib/email/message.py index 54c9cf7f94573e..80f01d66a33810 100644 --- a/Lib/email/message.py +++ b/Lib/email/message.py @@ -74,19 +74,25 @@ def _parseparam(s): # RDM This might be a Header, so for now stringify it. s = ';' + str(s) plist = [] - while s[:1] == ';': - s = s[1:] - end = s.find(';') - while end > 0 and (s.count('"', 0, end) - s.count('\\"', 0, end)) % 2: - end = s.find(';', end + 1) + start = 0 + while s.find(';', start) == start: + start += 1 + end = s.find(';', start) + ind, diff = start, 0 + while end > 0: + diff += s.count('"', ind, end) - s.count('\\"', ind, end) + if diff % 2 == 0: + break + end, ind = ind, s.find(';', end + 1) if end < 0: end = len(s) - f = s[:end] - if '=' in f: - i = f.index('=') - f = f[:i].strip().lower() + '=' + f[i+1:].strip() + i = s.find('=', start, end) + if i == -1: + f = s[start:end] + else: + f = s[start:i].rstrip().lower() + '=' + s[i+1:end].lstrip() plist.append(f.strip()) - s = s[end:] + start = end return plist diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py index 8aec1393f25a10..26169c3d0e7031 100644 --- a/Lib/test/test_email/test_email.py +++ b/Lib/test/test_email/test_email.py @@ -481,6 +481,27 @@ def test_get_param_with_quotes(self): "Content-Type: foo; bar*0=\"baz\\\"foobar\"; bar*1=\"\\\"baz\"") self.assertEqual(msg.get_param('bar'), 'baz"foobar"baz') + def test_get_param_linear_complexity(self): + # Ensure that email.message._parseparam() is fast. + # See https://github.com/python/cpython/issues/136063. + N = 100_000 + for s, r in [ + ("", ""), + ("foo=bar", "foo=bar"), + (" FOO = bar ", "foo=bar"), + ]: + with self.subTest(s=s, r=r, N=N): + src = f'{s};' * (N - 1) + s + res = email.message._parseparam(src) + self.assertEqual(len(res), N) + self.assertEqual(len(set(res)), 1) + self.assertEqual(res[0], r) + + # This will be considered as a single parameter. + malformed = 's="' + ';' * (N - 1) + res = email.message._parseparam(malformed) + self.assertEqual(res, [malformed]) + def test_field_containment(self): msg = email.message_from_string('Header: exists') self.assertIn('header', msg) diff --git a/Misc/NEWS.d/next/Security/2025-06-28-13-23-53.gh-issue-136063.aGk0Jv.rst b/Misc/NEWS.d/next/Security/2025-06-28-13-23-53.gh-issue-136063.aGk0Jv.rst new file mode 100644 index 00000000000000..940a3ad5a72f68 --- /dev/null +++ b/Misc/NEWS.d/next/Security/2025-06-28-13-23-53.gh-issue-136063.aGk0Jv.rst @@ -0,0 +1,2 @@ +:mod:`email.message`: ensure linear complexity for legacy HTTP parameters +parsing. Patch by Bénédikt Tran.

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[3.14] gh-139741: Make `dist-pdf` docs archive build work for macOS (GH-140837) (#141229)
by hugovk Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/58c0af99848e5ddf2e8471af11ff2f8c6a… commit: 58c0af99848e5ddf2e8471af11ff2f8c6a1a221c branch: 3.14 author: Miss Islington (bot) <31488909+miss-islington(a)users.noreply.github.com> committer: hugovk <1324225+hugovk(a)users.noreply.github.com> date: 2025-11-30T12:34:12Z summary: [3.14] gh-139741: Make `dist-pdf` docs archive build work for macOS (GH-140837) (#141229) Co-authored-by: Naitree Zhu <Naitreey(a)gmail.com> files: M Doc/Makefile diff --git a/Doc/Makefile b/Doc/Makefile index f6f4c721080c42..f16d9cacb1b6fb 100644 --- a/Doc/Makefile +++ b/Doc/Makefile @@ -241,7 +241,8 @@ dist-pdf: # as otherwise the full latexmk process is run twice. # ($$ is needed to escape the $; https://www.gnu.org/software/make/manual/make.html#Basics-of-Variable-Refer…) -sed -i 's/: all-$$(FMT)/:/' build/latex/Makefile - (cd build/latex; $(MAKE) clean && $(MAKE) --jobs=$$((`nproc`+1)) --output-sync LATEXMKOPTS='-quiet' all-pdf && $(MAKE) FMT=pdf zip bz2) + if [ -n "$(filter output-sync,$(value .FEATURES))" ]; then OUTPUTSYNC=--output-sync; else OUTPUTSYNC=; fi && \ + (cd build/latex; $(MAKE) clean && $(MAKE) --jobs=$$((`getconf _NPROCESSORS_ONLN`+1)) $$OUTPUTSYNC LATEXMKOPTS='-quiet' all-pdf && $(MAKE) FMT=pdf zip bz2) cp build/latex/docs-pdf.zip dist/python-$(DISTVERSION)-docs-pdf-a4.zip cp build/latex/docs-pdf.tar.bz2 dist/python-$(DISTVERSION)-docs-pdf-a4.tar.bz2 @echo "Build finished and archived!"

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[3.13] gh-140042: Removing unsafe call to sqlite3_shutdown (GH-141793) (#141812)
by hugovk Nov. 30, 2025

Nov. 30, 2025

https://github.com/python/cpython/commit/2d05a0cc2eb884b151a3305df84e29949c… commit: 2d05a0cc2eb884b151a3305df84e29949c63b895 branch: 3.13 author: Prithviraj Chaudhuri <p.chaudhuri1993(a)gmail.com> committer: hugovk <1324225+hugovk(a)users.noreply.github.com> date: 2025-11-30T14:33:05+02:00 summary: [3.13] gh-140042: Removing unsafe call to sqlite3_shutdown (GH-141793) (#141812) files: A Misc/NEWS.d/next/C API/2025-11-18-04-16-09.gh-issue-140042.S1C7id.rst M Modules/_sqlite/module.c diff --git a/Misc/NEWS.d/next/C API/2025-11-18-04-16-09.gh-issue-140042.S1C7id.rst b/Misc/NEWS.d/next/C API/2025-11-18-04-16-09.gh-issue-140042.S1C7id.rst new file mode 100644 index 00000000000000..608e806b431372 --- /dev/null +++ b/Misc/NEWS.d/next/C API/2025-11-18-04-16-09.gh-issue-140042.S1C7id.rst @@ -0,0 +1 @@ +Removed the sqlite3_shutdown call that could cause closing connections for sqlite when used with multiple sub interpreters. diff --git a/Modules/_sqlite/module.c b/Modules/_sqlite/module.c index 2c25ee32e58189..3d828abdd80edb 100644 --- a/Modules/_sqlite/module.c +++ b/Modules/_sqlite/module.c @@ -751,7 +751,6 @@ module_exec(PyObject *module) return 0; error: - sqlite3_shutdown(); return -1; }

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