From 368a26777a9915326b4857402a8ab595d9837f95 Mon Sep 17 00:00:00 2001 From: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Date: Tue, 10 Mar 2026 13:38:48 +0200 Subject: [PATCH 01/19] gh-142927: Detect system theme in flame graph like in heatmap (#144885) --- .../sampling/_flamegraph_assets/flamegraph.js | 42 +------------- .../flamegraph_template.html | 2 +- .../sampling/_heatmap_assets/heatmap.js | 17 ------ .../_heatmap_assets/heatmap_shared.js | 27 --------- Lib/profiling/sampling/_shared_assets/base.js | 58 +++++++++++++++++++ Lib/profiling/sampling/heatmap_collector.py | 4 +- Lib/profiling/sampling/stack_collector.py | 4 +- 7 files changed, 68 insertions(+), 86 deletions(-) create mode 100644 Lib/profiling/sampling/_shared_assets/base.js diff --git a/Lib/profiling/sampling/_flamegraph_assets/flamegraph.js b/Lib/profiling/sampling/_flamegraph_assets/flamegraph.js index 1a51802ffefac7..a2b21da2970064 100644 --- a/Lib/profiling/sampling/_flamegraph_assets/flamegraph.js +++ b/Lib/profiling/sampling/_flamegraph_assets/flamegraph.js @@ -83,18 +83,7 @@ function resolveStringIndices(node) { // ============================================================================ function toggleTheme() { - const html = document.documentElement; - const current = html.getAttribute('data-theme') || 'light'; - const next = current === 'light' ? 'dark' : 'light'; - html.setAttribute('data-theme', next); - localStorage.setItem('flamegraph-theme', next); - - // Update theme button icon - const btn = document.getElementById('theme-btn'); - if (btn) { - btn.querySelector('.icon-moon').style.display = next === 'dark' ? 'none' : ''; - btn.querySelector('.icon-sun').style.display = next === 'dark' ? '' : 'none'; - } + toggleAndSaveTheme(); // Re-render flamegraph with new theme colors if (window.flamegraphData && normalData) { @@ -154,17 +143,9 @@ function toggleSection(sectionId) { } } +// Restore theme from localStorage, or use browser preference function restoreUIState() { - // Restore theme - const savedTheme = localStorage.getItem('flamegraph-theme'); - if (savedTheme) { - document.documentElement.setAttribute('data-theme', savedTheme); - const btn = document.getElementById('theme-btn'); - if (btn) { - btn.querySelector('.icon-moon').style.display = savedTheme === 'dark' ? 'none' : ''; - btn.querySelector('.icon-sun').style.display = savedTheme === 'dark' ? '' : 'none'; - } - } + applyTheme(getPreferredTheme()); // Restore sidebar state const savedSidebar = localStorage.getItem('flamegraph-sidebar'); @@ -1242,23 +1223,6 @@ function generateInvertedFlamegraph(data) { return invertedRoot; } -function updateToggleUI(toggleId, isOn) { - const toggle = document.getElementById(toggleId); - if (toggle) { - const track = toggle.querySelector('.toggle-track'); - const labels = toggle.querySelectorAll('.toggle-label'); - if (isOn) { - track.classList.add('on'); - labels[0].classList.remove('active'); - labels[1].classList.add('active'); - } else { - track.classList.remove('on'); - labels[0].classList.add('active'); - labels[1].classList.remove('active'); - } - } -} - function toggleInvert() { isInverted = !isInverted; updateToggleUI('toggle-invert', isInverted); diff --git a/Lib/profiling/sampling/_flamegraph_assets/flamegraph_template.html b/Lib/profiling/sampling/_flamegraph_assets/flamegraph_template.html index 195a555d68e98b..07b15a5a2b48c7 100644 --- a/Lib/profiling/sampling/_flamegraph_assets/flamegraph_template.html +++ b/Lib/profiling/sampling/_flamegraph_assets/flamegraph_template.html @@ -1,5 +1,5 @@ - + diff --git a/Lib/profiling/sampling/_heatmap_assets/heatmap.js b/Lib/profiling/sampling/_heatmap_assets/heatmap.js index 53928b7b20fb11..2da1103b82a52a 100644 --- a/Lib/profiling/sampling/_heatmap_assets/heatmap.js +++ b/Lib/profiling/sampling/_heatmap_assets/heatmap.js @@ -203,23 +203,6 @@ function applyLineColors() { // Toggle Controls // ============================================================================ -function updateToggleUI(toggleId, isOn) { - const toggle = document.getElementById(toggleId); - if (toggle) { - const track = toggle.querySelector('.toggle-track'); - const labels = toggle.querySelectorAll('.toggle-label'); - if (isOn) { - track.classList.add('on'); - labels[0].classList.remove('active'); - labels[1].classList.add('active'); - } else { - track.classList.remove('on'); - labels[0].classList.add('active'); - labels[1].classList.remove('active'); - } - } -} - function toggleColdCode() { coldCodeHidden = !coldCodeHidden; applyHotFilter(); diff --git a/Lib/profiling/sampling/_heatmap_assets/heatmap_shared.js b/Lib/profiling/sampling/_heatmap_assets/heatmap_shared.js index 84b13ca0a9682b..fb761335876b0f 100644 --- a/Lib/profiling/sampling/_heatmap_assets/heatmap_shared.js +++ b/Lib/profiling/sampling/_heatmap_assets/heatmap_shared.js @@ -43,33 +43,6 @@ function intensityToColor(intensity) { // Theme Support // ============================================================================ -// Get the preferred theme from localStorage or browser preference -function getPreferredTheme() { - const saved = localStorage.getItem('heatmap-theme'); - if (saved) return saved; - return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'; -} - -// Apply theme and update UI. Returns the applied theme. -function applyTheme(theme) { - document.documentElement.setAttribute('data-theme', theme); - const btn = document.getElementById('theme-btn'); - if (btn) { - btn.querySelector('.icon-moon').style.display = theme === 'dark' ? 'none' : ''; - btn.querySelector('.icon-sun').style.display = theme === 'dark' ? '' : 'none'; - } - return theme; -} - -// Toggle theme and save preference. Returns the new theme. -function toggleAndSaveTheme() { - const current = document.documentElement.getAttribute('data-theme') || 'light'; - const next = current === 'light' ? 'dark' : 'light'; - applyTheme(next); - localStorage.setItem('heatmap-theme', next); - return next; -} - // Restore theme from localStorage, or use browser preference function restoreUIState() { applyTheme(getPreferredTheme()); diff --git a/Lib/profiling/sampling/_shared_assets/base.js b/Lib/profiling/sampling/_shared_assets/base.js new file mode 100644 index 00000000000000..da8b5851c85f62 --- /dev/null +++ b/Lib/profiling/sampling/_shared_assets/base.js @@ -0,0 +1,58 @@ +// Tachyon Profiler - Shared JavaScript +// Common utilities shared between flamegraph and heatmap views + +// ============================================================================ +// Theme Support +// ============================================================================ + +// Storage key for theme preference +const THEME_STORAGE_KEY = 'tachyon-theme'; + +// Get the preferred theme from localStorage or system preference +function getPreferredTheme() { + const saved = localStorage.getItem(THEME_STORAGE_KEY); + if (saved) return saved; + return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'; +} + +// Apply theme and update UI +function applyTheme(theme) { + document.documentElement.setAttribute('data-theme', theme); + const btn = document.getElementById('theme-btn'); + if (btn) { + const moonIcon = btn.querySelector('.icon-moon'); + const sunIcon = btn.querySelector('.icon-sun'); + if (moonIcon) moonIcon.style.display = theme === 'dark' ? 'none' : ''; + if (sunIcon) sunIcon.style.display = theme === 'dark' ? '' : 'none'; + } +} + +// Toggle theme and save preference. Returns the new theme. +function toggleAndSaveTheme() { + const current = document.documentElement.getAttribute('data-theme') || 'light'; + const next = current === 'light' ? 'dark' : 'light'; + applyTheme(next); + localStorage.setItem(THEME_STORAGE_KEY, next); + return next; +} + +// ============================================================================ +// Toggle Switch UI +// ============================================================================ + +function updateToggleUI(toggleId, isOn) { + const toggle = document.getElementById(toggleId); + if (toggle) { + const track = toggle.querySelector('.toggle-track'); + const labels = toggle.querySelectorAll('.toggle-label'); + if (isOn) { + track.classList.add('on'); + labels[0].classList.remove('active'); + labels[1].classList.add('active'); + } else { + track.classList.remove('on'); + labels[0].classList.add('active'); + labels[1].classList.remove('active'); + } + } +} diff --git a/Lib/profiling/sampling/heatmap_collector.py b/Lib/profiling/sampling/heatmap_collector.py index b6d9ff79e8ceec..ea1beec70d39f8 100644 --- a/Lib/profiling/sampling/heatmap_collector.py +++ b/Lib/profiling/sampling/heatmap_collector.py @@ -204,7 +204,9 @@ def _load_templates(self): self.file_css = css_content # Load JS - shared_js = (assets_dir / "heatmap_shared.js").read_text(encoding="utf-8") + base_js = (template_dir / "_shared_assets" / "base.js").read_text(encoding="utf-8") + heatmap_shared_js = (assets_dir / "heatmap_shared.js").read_text(encoding="utf-8") + shared_js = f"{base_js}\n{heatmap_shared_js}" self.index_js = f"{shared_js}\n{(assets_dir / 'heatmap_index.js').read_text(encoding='utf-8')}" self.file_js = f"{shared_js}\n{(assets_dir / 'heatmap.js').read_text(encoding='utf-8')}" diff --git a/Lib/profiling/sampling/stack_collector.py b/Lib/profiling/sampling/stack_collector.py index 5a3497a5408414..931bc2c487b55b 100644 --- a/Lib/profiling/sampling/stack_collector.py +++ b/Lib/profiling/sampling/stack_collector.py @@ -377,7 +377,9 @@ def _create_flamegraph_html(self, data): html_template = (template_dir / "_flamegraph_assets" / "flamegraph_template.html").read_text(encoding="utf-8") css_content = get_combined_css("flamegraph") - js_content = (template_dir / "_flamegraph_assets" / "flamegraph.js").read_text(encoding="utf-8") + base_js = (template_dir / "_shared_assets" / "base.js").read_text(encoding="utf-8") + component_js = (template_dir / "_flamegraph_assets" / "flamegraph.js").read_text(encoding="utf-8") + js_content = f"{base_js}\n{component_js}" # Inline first-party CSS/JS html_template = html_template.replace( From 728e4a075e3dae7e04edf90ad137a35073deb141 Mon Sep 17 00:00:00 2001 From: Kumar Aditya Date: Tue, 10 Mar 2026 17:41:12 +0530 Subject: [PATCH 02/19] gh-142651: use `NonCallableMock._lock` for thread safety of `call_count` (#142922) --- Lib/unittest/mock.py | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py index 34fd49bf56fbb6..64a01a0b713c61 100644 --- a/Lib/unittest/mock.py +++ b/Lib/unittest/mock.py @@ -1184,10 +1184,16 @@ def _increment_mock_call(self, /, *args, **kwargs): # handle call_args # needs to be set here so assertions on call arguments pass before # execution in the case of awaited calls - _call = _Call((args, kwargs), two=True) - self.call_args = _call - self.call_args_list.append(_call) - self.call_count = len(self.call_args_list) + with NonCallableMock._lock: + # Lock is used here so that call_args_list and call_count are + # set atomically otherwise it is possible that by the time call_count + # is set another thread may have appended to call_args_list. + # The rest of this function relies on list.append being atomic and + # skips locking. + _call = _Call((args, kwargs), two=True) + self.call_args = _call + self.call_args_list.append(_call) + self.call_count = len(self.call_args_list) # initial stuff for method_calls: do_method_calls = self._mock_parent is not None From 6024d3c6dadf73bcd0b234d2d97365486253f0ee Mon Sep 17 00:00:00 2001 From: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Date: Tue, 10 Mar 2026 14:30:46 +0200 Subject: [PATCH 03/19] Python 3.15.0a7 --- Doc/c-api/arg.rst | 4 +- Doc/c-api/dict.rst | 2 +- Doc/c-api/exceptions.rst | 2 +- Doc/c-api/import.rst | 10 +- Doc/c-api/object.rst | 2 +- Doc/library/dataclasses.rst | 2 +- Doc/library/email.headerregistry.rst | 2 +- Doc/library/exceptions.rst | 2 +- Doc/library/functions.rst | 6 +- Doc/library/importlib.rst | 4 +- Doc/library/mailbox.rst | 2 +- Doc/library/marshal.rst | 2 +- Doc/library/os.rst | 6 +- Doc/library/re.rst | 6 +- Doc/library/shutil.rst | 2 +- Doc/library/stdtypes.rst | 4 +- Doc/library/sys.rst | 8 +- Doc/library/types.rst | 2 +- Doc/library/unicodedata.rst | 2 +- Doc/library/xml.etree.elementtree.rst | 4 +- Doc/reference/lexical_analysis.rst | 2 +- Doc/reference/simple_stmts.rst | 2 +- Doc/using/cmdline.rst | 8 +- Include/patchlevel.h | 4 +- Lib/pydoc_data/module_docs.py | 2 +- Lib/pydoc_data/topics.py | 410 +++--- Misc/NEWS.d/3.15.0a7.rst | 1212 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PyArg_ParseArrayAndKeywords(PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames, const char *format, const char * const *kwlist, ...) @@ -535,7 +535,7 @@ API Functions Returns true on success; on failure, it returns false and raises the appropriate exception. - .. versionadded:: next + .. versionadded:: 3.15 .. c:function:: int PyArg_UnpackTuple(PyObject *args, const char *name, Py_ssize_t min, Py_ssize_t max, ...) diff --git a/Doc/c-api/dict.rst b/Doc/c-api/dict.rst index 371761573e97de..d63c26865899cc 100644 --- a/Doc/c-api/dict.rst +++ b/Doc/c-api/dict.rst @@ -495,7 +495,7 @@ Dictionary view objects Frozen dictionary objects ^^^^^^^^^^^^^^^^^^^^^^^^^ -.. versionadded:: next +.. versionadded:: 3.15 .. c:var:: PyTypeObject PyFrozenDict_Type diff --git a/Doc/c-api/exceptions.rst b/Doc/c-api/exceptions.rst index aef191d3a29ac6..8ecd7c62517104 100644 --- a/Doc/c-api/exceptions.rst +++ b/Doc/c-api/exceptions.rst @@ -716,7 +716,7 @@ Signal Handling This function may now execute a remote debugger script, if remote debugging is enabled. - .. versionchanged:: next + .. versionchanged:: 3.15 The exception set by :c:func:`PyThreadState_SetAsyncExc` is now raised. diff --git a/Doc/c-api/import.rst b/Doc/c-api/import.rst index 04b5adb9a8f43d..367490732b994f 100644 --- a/Doc/c-api/import.rst +++ b/Doc/c-api/import.rst @@ -350,14 +350,14 @@ Importing Modules Gets the current lazy imports mode. - .. versionadded:: next + .. versionadded:: 3.15 .. c:function:: PyObject* PyImport_GetLazyImportsFilter() Return a :term:`strong reference` to the current lazy imports filter, or ``NULL`` if none exists. This function always succeeds. - .. versionadded:: next + .. versionadded:: 3.15 .. c:function:: int PyImport_SetLazyImportsMode(PyImport_LazyImportsMode mode) @@ -366,7 +366,7 @@ Importing Modules This function always returns ``0``. - .. versionadded:: next + .. versionadded:: 3.15 .. c:function:: int PyImport_SetLazyImportsFilter(PyObject *filter) @@ -377,7 +377,7 @@ Importing Modules Return ``0`` on success and ``-1`` with an exception set otherwise. - .. versionadded:: next + .. versionadded:: 3.15 .. c:type:: PyImport_LazyImportsMode @@ -396,7 +396,7 @@ Importing Modules Disable lazy imports entirely. Even explicit ``lazy`` statements become eager imports. - .. versionadded:: next + .. versionadded:: 3.15 .. c:function:: PyObject* PyImport_CreateModuleFromInitfunc(PyObject *spec, PyObject* (*initfunc)(void)) diff --git a/Doc/c-api/object.rst b/Doc/c-api/object.rst index f71bfebdb2a19a..15a4b55eab82f0 100644 --- a/Doc/c-api/object.rst +++ b/Doc/c-api/object.rst @@ -817,4 +817,4 @@ Object Protocol Returns 1 if the object was made immortal and returns 0 if it was not. This function cannot fail. - .. versionadded:: next + .. versionadded:: 3.15 diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst index 447f05e67d8418..fd8e0c0bea1cb1 100644 --- a/Doc/library/dataclasses.rst +++ b/Doc/library/dataclasses.rst @@ -330,7 +330,7 @@ Module contents :attr:`!C.t` will be ``20``, and the class attributes :attr:`!C.x` and :attr:`!C.y` will not be set. - .. versionchanged:: next + .. versionchanged:: 3.15 If *metadata* is ``None``, use an empty :class:`frozendict`, instead of a :func:`~types.MappingProxyType` of an empty :class:`dict`. diff --git a/Doc/library/email.headerregistry.rst b/Doc/library/email.headerregistry.rst index 8dfcd492f0a763..c6924a0ac29c97 100644 --- a/Doc/library/email.headerregistry.rst +++ b/Doc/library/email.headerregistry.rst @@ -266,7 +266,7 @@ variant, :attr:`~.BaseHeader.max_count` is set to 1. A dictionary mapping parameter names to parameter values. - .. versionchanged:: next + .. versionchanged:: 3.15 It is now a :class:`frozendict` instead of a :class:`types.MappingProxyType`. diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst index 33f37bdf1fc1cd..3db3c7a13503f4 100644 --- a/Doc/library/exceptions.rst +++ b/Doc/library/exceptions.rst @@ -271,7 +271,7 @@ The following exceptions are the exceptions that are usually raised. A subclass of :exc:`ImportError` which is raised when a lazy import fails because it (directly or indirectly) tries to import itself. - .. versionadded:: next + .. versionadded:: 3.15 .. exception:: IndexError diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index af53b57dc9d2a7..1d83cb6f2bb688 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -660,7 +660,7 @@ are always available. They are listed here in alphabetical order. The semantics of the default *locals* namespace have been adjusted as described for the :func:`locals` builtin. - .. versionchanged:: next + .. versionchanged:: 3.15 *globals* can now be a :class:`frozendict`. @@ -741,7 +741,7 @@ are always available. They are listed here in alphabetical order. The semantics of the default *locals* namespace have been adjusted as described for the :func:`locals` builtin. - .. versionchanged:: next + .. versionchanged:: 3.15 *globals* can now be a :class:`frozendict`. @@ -2099,7 +2099,7 @@ are always available. They are listed here in alphabetical order. Subclasses of :class:`!type` which don't override ``type.__new__`` may no longer use the one-argument form to get the type of an object. - .. versionchanged:: next + .. versionchanged:: 3.15 *dict* can now be a :class:`frozendict`. diff --git a/Doc/library/importlib.rst b/Doc/library/importlib.rst index d5036a0fe7510b..785f6c614b4391 100644 --- a/Doc/library/importlib.rst +++ b/Doc/library/importlib.rst @@ -292,7 +292,7 @@ ABC hierarchy:: instead of a :class:`list` or other :class:`collection ` type. - .. versionadded:: next + .. versionadded:: 3.15 .. class:: PathEntryFinder @@ -346,7 +346,7 @@ ABC hierarchy:: instead of a :class:`list` or other :class:`collection ` type. - .. versionadded:: next + .. versionadded:: 3.15 .. class:: Loader diff --git a/Doc/library/mailbox.rst b/Doc/library/mailbox.rst index b9a55a03dc8ae7..5b9741bdbcad19 100644 --- a/Doc/library/mailbox.rst +++ b/Doc/library/mailbox.rst @@ -80,7 +80,7 @@ Supported mailbox formats are Maildir, mbox, MH, Babyl, and MMDF. returns the mailbox object as the context object, and at context end calls :meth:`close`, thereby releasing the lock. - .. versionchanged:: next + .. versionchanged:: 3.15 Support for the :keyword:`with` statement was added. :class:`!Mailbox` instances have the following methods: diff --git a/Doc/library/marshal.rst b/Doc/library/marshal.rst index 25902622b8730b..4fe34f0a3a3f91 100644 --- a/Doc/library/marshal.rst +++ b/Doc/library/marshal.rst @@ -72,7 +72,7 @@ this module. The following types are supported: Added format version 5, which allows marshalling slices. -.. versionchanged:: next +.. versionchanged:: 3.15 Added format version 6, which allows marshalling :class:`frozendict`. diff --git a/Doc/library/os.rst b/Doc/library/os.rst index a22afdec516bb4..940d04ccc925cd 100644 --- a/Doc/library/os.rst +++ b/Doc/library/os.rst @@ -2409,7 +2409,7 @@ features: .. versionchanged:: 3.6 Accepts a :term:`path-like object`. - .. versionchanged:: next + .. versionchanged:: 3.15 ``os.listdir(-1)`` now fails with ``OSError(errno.EBADF)`` rather than listing the current directory. @@ -2943,7 +2943,7 @@ features: .. versionchanged:: 3.7 Added support for :ref:`file descriptors ` on Unix. - .. versionchanged:: next + .. versionchanged:: 3.15 ``os.scandir(-1)`` now fails with ``OSError(errno.EBADF)`` rather than listing the current directory. @@ -4582,7 +4582,7 @@ These functions are all available on Linux only. .. versionchanged:: 3.6 Accepts a :term:`path-like object`. - .. versionchanged:: next + .. versionchanged:: 3.15 ``os.listxattr(-1)`` now fails with ``OSError(errno.EBADF)`` rather than listing extended attributes of the current directory. diff --git a/Doc/library/re.rst b/Doc/library/re.rst index 7edb85ca507722..43fb7295876fe1 100644 --- a/Doc/library/re.rst +++ b/Doc/library/re.rst @@ -954,7 +954,7 @@ Functions :func:`~re.match`. Use that name when you need to retain compatibility with older Python versions. - .. versionchanged:: next + .. versionchanged:: 3.15 The alternate :func:`~re.prefixmatch` name of this API was added as a more explicitly descriptive name than :func:`~re.match`. Use it to better express intent. The norm in other languages and regular expression @@ -1309,7 +1309,7 @@ Regular Expression Objects :meth:`~Pattern.match`. Use that name when you need to retain compatibility with older Python versions. - .. versionchanged:: next + .. versionchanged:: 3.15 The alternate :meth:`~Pattern.prefixmatch` name of this API was added as a more explicitly descriptive name than :meth:`~Pattern.match`. Use it to better express intent. The norm in other languages and regular expression @@ -1781,7 +1781,7 @@ We **do not** plan to deprecate and remove the older *match* name, as it has been used in code for over 30 years. Code supporting older versions of Python should continue to use *match*. -.. versionadded:: next +.. versionadded:: 3.15 Making a Phonebook ^^^^^^^^^^^^^^^^^^ diff --git a/Doc/library/shutil.rst b/Doc/library/shutil.rst index 0666fcfde61e61..d289ba58c24065 100644 --- a/Doc/library/shutil.rst +++ b/Doc/library/shutil.rst @@ -669,7 +669,7 @@ provided. They rely on the :mod:`zipfile` and :mod:`tarfile` modules. This function is now made thread-safe during creation of standard ``.zip`` and tar archives. - .. versionchanged:: next + .. versionchanged:: 3.15 Accepts a :term:`path-like object` for *base_name*, *root_dir* and *base_dir*. diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst index c930b876b3ccbf..e16954b12a6c2b 100644 --- a/Doc/library/stdtypes.rst +++ b/Doc/library/stdtypes.rst @@ -2385,7 +2385,7 @@ expression support in the :mod:`re` module). the same position in *to*. If there is a third argument, it must be a string, whose characters will be mapped to ``None`` in the result. - .. versionchanged:: next + .. versionchanged:: 3.15 *dict* can now be a :class:`frozendict`. @@ -5665,7 +5665,7 @@ Frozen dictionaries :class:`!frozendict` is not a :class:`!dict` subclass but inherits directly from ``object``. - .. versionadded:: next + .. versionadded:: 3.15 .. _typecontextmanager: diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst index 4c76feafc9b492..b1461b0cbaf528 100644 --- a/Doc/library/sys.rst +++ b/Doc/library/sys.rst @@ -924,7 +924,7 @@ always available. Unless explicitly noted otherwise, all variables are read-only See also :func:`set_lazy_imports` and :pep:`810`. - .. versionadded:: next + .. versionadded:: 3.15 .. function:: get_lazy_imports_filter() @@ -937,7 +937,7 @@ always available. Unless explicitly noted otherwise, all variables are read-only :func:`set_lazy_imports_filter` for details on the filter function signature. - .. versionadded:: next + .. versionadded:: 3.15 .. function:: getrefcount(object) @@ -1770,7 +1770,7 @@ always available. Unless explicitly noted otherwise, all variables are read-only See also :func:`get_lazy_imports` and :pep:`810`. - .. versionadded:: next + .. versionadded:: 3.15 .. function:: set_lazy_imports_filter(filter) @@ -1800,7 +1800,7 @@ always available. Unless explicitly noted otherwise, all variables are read-only See also :func:`get_lazy_imports_filter` and :pep:`810`. - .. versionadded:: next + .. versionadded:: 3.15 .. function:: setprofile(profilefunc) diff --git a/Doc/library/types.rst b/Doc/library/types.rst index 01f4df3c89091f..74898baa521bd6 100644 --- a/Doc/library/types.rst +++ b/Doc/library/types.rst @@ -350,7 +350,7 @@ Standard names are defined for the following types: actually accessed. This type can be used to detect lazy imports programmatically. - .. versionadded:: next + .. versionadded:: 3.15 .. seealso:: :pep:`810` diff --git a/Doc/library/unicodedata.rst b/Doc/library/unicodedata.rst index d5f0405efbecc6..f5c11fd849f58b 100644 --- a/Doc/library/unicodedata.rst +++ b/Doc/library/unicodedata.rst @@ -139,7 +139,7 @@ following functions: >>> unicodedata.block('S') 'Basic Latin' - .. versionadded:: next + .. versionadded:: 3.15 .. function:: mirrored(chr, /) diff --git a/Doc/library/xml.etree.elementtree.rst b/Doc/library/xml.etree.elementtree.rst index 45abf5b1e736b3..919d4c595bf793 100644 --- a/Doc/library/xml.etree.elementtree.rst +++ b/Doc/library/xml.etree.elementtree.rst @@ -702,7 +702,7 @@ Functions attributes. *extra* contains additional attributes, given as keyword arguments. Returns an element instance. - .. versionchanged:: next + .. versionchanged:: 3.15 *attrib* can now be a :class:`frozendict`. @@ -890,7 +890,7 @@ Element Objects an optional dictionary, containing element attributes. *extra* contains additional attributes, given as keyword arguments. - .. versionchanged:: next + .. versionchanged:: 3.15 *attrib* can now be a :class:`frozendict`. diff --git a/Doc/reference/lexical_analysis.rst b/Doc/reference/lexical_analysis.rst index 5c931683db100a..ae541680c534d6 100644 --- a/Doc/reference/lexical_analysis.rst +++ b/Doc/reference/lexical_analysis.rst @@ -469,7 +469,7 @@ identifier names. .. versionchanged:: 3.12 ``type`` is now a soft keyword. -.. versionchanged:: next +.. versionchanged:: 3.15 ``lazy`` is now a soft keyword. .. index:: diff --git a/Doc/reference/simple_stmts.rst b/Doc/reference/simple_stmts.rst index 9ada6f047843b4..9b84c2e9ac7017 100644 --- a/Doc/reference/simple_stmts.rst +++ b/Doc/reference/simple_stmts.rst @@ -918,7 +918,7 @@ used, not at the import statement itself. See :pep:`810` for the full specification of lazy imports. -.. versionadded:: next +.. versionadded:: 3.15 .. _future: diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst index cc3d2f154ed754..5c3d44395c0039 100644 --- a/Doc/using/cmdline.rst +++ b/Doc/using/cmdline.rst @@ -692,7 +692,7 @@ Miscellaneous options If false (``0``) suppress these warnings. Set to true by default. See also :envvar:`PYTHON_PATHCONFIG_WARNINGS`. - .. versionadded:: next + .. versionadded:: 3.15 * :samp:`-X tlbc={0,1}` enables (1, the default) or disables (0) thread-local bytecode in builds configured with :option:`--disable-gil`. When disabled, @@ -707,7 +707,7 @@ Miscellaneous options (the default) respects the ``lazy`` keyword in source code. See also :envvar:`PYTHON_LAZY_IMPORTS`. - .. versionadded:: next + .. versionadded:: 3.15 It also allows passing arbitrary values and retrieving them through the :data:`sys._xoptions` dictionary. @@ -1367,7 +1367,7 @@ conflict. stderr. If false (``0``) suppress these warnings. Set to true by default. See also :option:`-X pathconfig_warnings<-X>`. - .. versionadded:: next + .. versionadded:: 3.15 .. envvar:: PYTHON_JIT @@ -1396,7 +1396,7 @@ conflict. See also the :option:`-X lazy_imports <-X>` command-line option. - .. versionadded:: next + .. versionadded:: 3.15 Debug-mode variables ~~~~~~~~~~~~~~~~~~~~ diff --git a/Include/patchlevel.h b/Include/patchlevel.h index 50d5ac4a73c1d8..3cc12a2b2d3888 100644 --- a/Include/patchlevel.h +++ b/Include/patchlevel.h @@ -24,10 +24,10 @@ #define PY_MINOR_VERSION 15 #define PY_MICRO_VERSION 0 #define PY_RELEASE_LEVEL PY_RELEASE_LEVEL_ALPHA -#define PY_RELEASE_SERIAL 6 +#define PY_RELEASE_SERIAL 7 /* Version as a string */ -#define PY_VERSION "3.15.0a6+" +#define PY_VERSION "3.15.0a7" /*--end constants--*/ diff --git a/Lib/pydoc_data/module_docs.py b/Lib/pydoc_data/module_docs.py index 76a2c18bdb2f0e..314bef547f3052 100644 --- a/Lib/pydoc_data/module_docs.py +++ b/Lib/pydoc_data/module_docs.py @@ -1,4 +1,4 @@ -# Autogenerated by Sphinx on Wed Feb 11 14:22:57 2026 +# Autogenerated by Sphinx on Tue Mar 10 14:31:07 2026 # as part of the release process. module_docs = { diff --git a/Lib/pydoc_data/topics.py b/Lib/pydoc_data/topics.py index dc09c5fd47affe..7dd9cfe2ff5821 100644 --- a/Lib/pydoc_data/topics.py +++ b/Lib/pydoc_data/topics.py @@ -1,4 +1,4 @@ -# Autogenerated by Sphinx on Wed Feb 11 14:22:57 2026 +# Autogenerated by Sphinx on Tue Mar 10 14:31:07 2026 # as part of the release process. topics = { @@ -361,13 +361,12 @@ async def func(param1, param2): Is semantically equivalent to: - iter = (ITER) - iter = type(iter).__aiter__(iter) + iter = (ITER).__aiter__() running = True while running: try: - TARGET = await type(iter).__anext__(iter) + TARGET = await iter.__anext__() except StopAsyncIteration: running = False else: @@ -375,7 +374,8 @@ async def func(param1, param2): else: SUITE2 -See also "__aiter__()" and "__anext__()" for details. +except that implicit special method lookup is used for "__aiter__()" +and "__anext__()". It is a "SyntaxError" to use an "async for" statement outside the body of a coroutine function. @@ -397,9 +397,9 @@ async def func(param1, param2): is semantically equivalent to: manager = (EXPRESSION) - aenter = type(manager).__aenter__ - aexit = type(manager).__aexit__ - value = await aenter(manager) + aenter = manager.__aenter__ + aexit = manager.__aexit__ + value = await aenter() hit_except = False try: @@ -407,13 +407,14 @@ async def func(param1, param2): SUITE except: hit_except = True - if not await aexit(manager, *sys.exc_info()): + if not await aexit(*sys.exc_info()): raise finally: if not hit_except: - await aexit(manager, None, None, None) + await aexit(None, None, None) -See also "__aenter__()" and "__aexit__()" for details. +except that implicit special method lookup is used for "__aenter__()" +and "__aexit__()". It is a "SyntaxError" to use an "async with" statement outside the body of a coroutine function. @@ -481,16 +482,34 @@ async def func(param1, param2): 'atom-literals': r'''Literals ******** -Python supports string and bytes literals and various numeric -literals: +A *literal* is a textual representation of a value. Python supports +numeric, string and bytes literals. Format strings and template +strings are treated as string literals. + +Numeric literals consist of a single "NUMBER" token, which names an +integer, floating-point number, or an imaginary number. See the +Numeric literals section in Lexical analysis documentation for +details. + +String and bytes literals may consist of several tokens. See section +String literal concatenation for details. + +Note that negative and complex numbers, like "-3" or "3+4.2j", are +syntactically not literals, but unary or binary arithmetic operations +involving the "-" or "+" operator. + +Evaluation of a literal yields an object of the given type ("int", +"float", "complex", "str", "bytes", or "Template") with the given +value. The value may be approximated in the case of floating-point and +imaginary literals. + +The formal grammar for literals is: literal: strings | NUMBER -Evaluation of a literal yields an object of the given type (string, -bytes, integer, floating-point number, complex number) with the given -value. The value may be approximated in the case of floating-point -and imaginary (complex) literals. See section Literals for details. -See section String literal concatenation for details on "strings". + +Literals and object identity +============================ All literals correspond to immutable data types, and hence the object’s identity is less important than its value. Multiple @@ -498,21 +517,53 @@ async def func(param1, param2): occurrence in the program text or a different occurrence) may obtain the same object or a different object with the same value. +CPython implementation detail: For example, in CPython, *small* +integers with the same value evaluate to the same object: + + >>> x = 7 + >>> y = 7 + >>> x is y + True + +However, large integers evaluate to different objects: + + >>> x = 123456789 + >>> y = 123456789 + >>> x is y + False + +This behavior may change in future versions of CPython. In particular, +the boundary between “small” and “large” integers has already changed +in the past.CPython will emit a "SyntaxWarning" when you compare +literals using "is": + + >>> x = 7 + >>> x is 7 + :1: SyntaxWarning: "is" with 'int' literal. Did you mean "=="? + True + +See When can I rely on identity tests with the is operator? for more +information. + +Template strings are immutable but may reference mutable objects as +"Interpolation" values. For the purposes of this section, two +t-strings have the “same value” if both their structure and the +*identity* of the values match. + +**CPython implementation detail:** Currently, each evaluation of a +template string results in a different object. + String literal concatenation ============================ -Multiple adjacent string or bytes literals (delimited by whitespace), -possibly using different quoting conventions, are allowed, and their -meaning is the same as their concatenation: +Multiple adjacent string or bytes literals, possibly using different +quoting conventions, are allowed, and their meaning is the same as +their concatenation: >>> "hello" 'world' "helloworld" -Formally: - - strings: ( STRING | fstring)+ | tstring+ - This feature is defined at the syntactical level, so it only works with literals. To concatenate string expressions at run time, the ‘+’ operator may be used: @@ -543,6 +594,10 @@ async def func(param1, param2): >>> t"Hello" t"{name}!" Template(strings=('Hello', '!'), interpolations=(...)) + +Formally: + + strings: (STRING | fstring)+ | tstring+ ''', 'attribute-access': r'''Customizing attribute access **************************** @@ -1007,7 +1062,7 @@ class and instance attributes applies as for regular assignments. The "%" (modulo) operator yields the remainder from the division of the first argument by the second. The numeric arguments are first -converted to a common type. A zero right argument raises the +converted to a common type. A zero right argument raises the "ZeroDivisionError" exception. The arguments may be floating-point numbers, e.g., "3.14%0.7" equals "0.34" (since "3.14" equals "4*0.7 + 0.34".) The modulo operator always yields a result with the same sign @@ -2229,9 +2284,9 @@ def foo(): is semantically equivalent to: manager = (EXPRESSION) - enter = type(manager).__enter__ - exit = type(manager).__exit__ - value = enter(manager) + enter = manager.__enter__ + exit = manager.__exit__ + value = enter() hit_except = False try: @@ -2239,11 +2294,14 @@ def foo(): SUITE except: hit_except = True - if not exit(manager, *sys.exc_info()): + if not exit(*sys.exc_info()): raise finally: if not hit_except: - exit(manager, None, None, None) + exit(None, None, None) + +except that implicit special method lookup is used for "__enter__()" +and "__exit__()". With more than one item, the context managers are processed as if multiple "with" statements were nested: @@ -3287,13 +3345,12 @@ async def func(param1, param2): Is semantically equivalent to: - iter = (ITER) - iter = type(iter).__aiter__(iter) + iter = (ITER).__aiter__() running = True while running: try: - TARGET = await type(iter).__anext__(iter) + TARGET = await iter.__anext__() except StopAsyncIteration: running = False else: @@ -3301,7 +3358,8 @@ async def func(param1, param2): else: SUITE2 -See also "__aiter__()" and "__anext__()" for details. +except that implicit special method lookup is used for "__aiter__()" +and "__anext__()". It is a "SyntaxError" to use an "async for" statement outside the body of a coroutine function. @@ -3323,9 +3381,9 @@ async def func(param1, param2): is semantically equivalent to: manager = (EXPRESSION) - aenter = type(manager).__aenter__ - aexit = type(manager).__aexit__ - value = await aenter(manager) + aenter = manager.__aenter__ + aexit = manager.__aexit__ + value = await aenter() hit_except = False try: @@ -3333,13 +3391,14 @@ async def func(param1, param2): SUITE except: hit_except = True - if not await aexit(manager, *sys.exc_info()): + if not await aexit(*sys.exc_info()): raise finally: if not hit_except: - await aexit(manager, None, None, None) + await aexit(None, None, None) -See also "__aenter__()" and "__aexit__()" for details. +except that implicit special method lookup is used for "__aenter__()" +and "__aexit__()". It is a "SyntaxError" to use an "async with" statement outside the body of a coroutine function. @@ -3676,8 +3735,8 @@ def f() -> annotation: ... * a class that inherits from any of the above - The standard library classes "dict", "frozendict" - and "types.MappingProxyType" are mappings. + The standard library classes "dict" and "types.MappingProxyType" + are mappings. [4] A string literal appearing as the first statement in the function body is transformed into the function’s "__doc__" attribute and @@ -3750,19 +3809,13 @@ def f() -> annotation: ... When a description of an arithmetic operator below uses the phrase “the numeric arguments are converted to a common real type”, this -means that the operator implementation for built-in types works as -follows: - -* If both arguments are complex numbers, no conversion is performed; +means that the operator implementation for built-in numeric types +works as described in the Numeric Types section of the standard +library documentation. -* if either argument is a complex or a floating-point number, the - other is converted to a floating-point number; - -* otherwise, both must be integers and no conversion is necessary. - -Some additional rules apply for certain operators (e.g., a string as a -left argument to the ‘%’ operator). Extensions must define their own -conversion behavior. +Some additional rules apply for certain operators and non-numeric +operands (for example, a string as a left argument to the "%" +operator). Extensions must define their own conversion behavior. ''', 'customization': r'''Basic customization ******************* @@ -4056,7 +4109,7 @@ def __hash__(self): intended to provide protection against a denial-of-service caused by carefully chosen inputs that exploit the worst case performance of a dict insertion, *O*(*n*^2) complexity. See - http://ocert.org/advisories/ocert-2011-003.html for + https://ocert.org/advisories/ocert-2011-003.html for details.Changing hash values affects the iteration order of sets. Python has never made guarantees about this ordering (and it typically varies between 32-bit and 64-bit builds).See also @@ -4971,8 +5024,8 @@ def inner(x): CPython, the value was evaluated before the key. Starting with 3.8, the key is evaluated before the value, as proposed by **PEP 572**. -Changed in version 3.15.0a5 (unreleased): Unpacking with the "**" -operator is now allowed in dictionary comprehensions. +Changed in version 3.15: Unpacking with the "**" operator is now +allowed in dictionary comprehensions. ''', 'dynamic-features': r'''Interaction with dynamic features ********************************* @@ -6552,6 +6605,8 @@ def whats_on_the_telly(penguin=None): * "type", when used in the "type" statement. +* "lazy", when used before an "import" statement. + These syntactically act as keywords in their specific contexts, but this distinction is done at the parser level, not when tokenizing. @@ -6561,6 +6616,9 @@ def whats_on_the_telly(penguin=None): Changed in version 3.12: "type" is now a soft keyword. +Changed in version 3.15.0a6 (unreleased): "lazy" is now a soft +keyword. + Reserved classes of identifiers =============================== @@ -6770,10 +6828,10 @@ def whats_on_the_telly(penguin=None): 'import': r'''The "import" statement ********************** - import_stmt: "import" module ["as" identifier] ("," module ["as" identifier])* - | "from" relative_module "import" identifier ["as" identifier] + import_stmt: ["lazy"] "import" module ["as" identifier] ("," module ["as" identifier])* + | ["lazy"] "from" relative_module "import" identifier ["as" identifier] ("," identifier ["as" identifier])* - | "from" relative_module "import" "(" identifier ["as" identifier] + | ["lazy"] "from" relative_module "import" "(" identifier ["as" identifier] ("," identifier ["as" identifier])* [","] ")" | "from" relative_module "import" "*" module: (identifier ".")* identifier @@ -6885,6 +6943,48 @@ def whats_on_the_telly(penguin=None): "sys.path", "sys.meta_path", "sys.path_hooks". +Lazy imports +============ + +The "lazy" keyword is a soft keyword that only has special meaning +when it appears immediately before an "import" or "from" statement. +When an import statement is preceded by the "lazy" keyword, the import +becomes *lazy*: the module is not loaded immediately at the import +statement. Instead, a lazy proxy object is created and bound to the +name. The actual module is loaded on first use of that name. + +Lazy imports are only permitted at module scope. Using "lazy" inside a +function, class body, or "try"/"except"/"finally" block raises a +"SyntaxError". Star imports cannot be lazy ("lazy from module import +*" is a syntax error), and future statements cannot be lazy. + +When using "lazy from ... import", each imported name is bound to a +lazy proxy object. The first access to any of these names triggers +loading of the entire module and resolves only that specific name to +its actual value. Other names remain as lazy proxies until they are +accessed. + +Example: + + lazy import json + import sys + + print('json' in sys.modules) # False - json module not yet loaded + + # First use triggers loading + result = json.dumps({"hello": "world"}) + + print('json' in sys.modules) # True - now loaded + +If an error occurs during module loading (such as "ImportError" or +"SyntaxError"), it is raised at the point where the lazy import is +first used, not at the import statement itself. + +See **PEP 810** for the full specification of lazy imports. + +Added in version 3.15.0a6 (unreleased). + + Future statements ================= @@ -7975,8 +8075,8 @@ class C: pass # a class with no methods (yet) The power operator has the same semantics as the built-in "pow()" function, when called with two arguments: it yields its left argument -raised to the power of its right argument. The numeric arguments are -first converted to a common type, and the result is of that type. +raised to the power of its right argument. Numeric arguments are first +converted to a common type, and the result is of that type. For int operands, the result has the same type as the operands unless the second argument is negative; in that case, all arguments are @@ -8701,7 +8801,7 @@ def __hash__(self): intended to provide protection against a denial-of-service caused by carefully chosen inputs that exploit the worst case performance of a dict insertion, *O*(*n*^2) complexity. See - http://ocert.org/advisories/ocert-2011-003.html for + https://ocert.org/advisories/ocert-2011-003.html for details.Changing hash values affects the iteration order of sets. Python has never made guarantees about this ordering (and it typically varies between 32-bit and 64-bit builds).See also @@ -10312,16 +10412,14 @@ class is used in a class pattern with positional arguments, each "c.isalpha()", "c.isdecimal()", "c.isdigit()", or "c.isnumeric()". For example: - .. doctest:: - - >>> 'abc123'.isalnum() - True - >>> 'abc123!@#'.isalnum() - False - >>> ''.isalnum() - False - >>> ' '.isalnum() - False + >>> 'abc123'.isalnum() + True + >>> 'abc123!@#'.isalnum() + False + >>> ''.isalnum() + False + >>> ' '.isalnum() + False str.isalpha() @@ -10575,6 +10673,9 @@ class is used in a class pattern with positional arguments, each a third argument, it must be a string, whose characters will be mapped to "None" in the result. + Changed in version 3.15.0a6 (unreleased): *dict* can now be a + "frozendict". + str.partition(sep, /) Split the string at the first occurrence of *sep*, and return a @@ -10676,6 +10777,17 @@ class is used in a class pattern with positional arguments, each space). The original string is returned if *width* is less than or equal to "len(s)". + For example: + + >>> 'Python'.rjust(10) + ' Python' + >>> 'Python'.rjust(10, '.') + '....Python' + >>> 'Monty Python'.rjust(10, '.') + 'Monty Python' + + See also "ljust()" and "zfill()". + str.rpartition(sep, /) Split the string at the last occurrence of *sep*, and return a @@ -10982,6 +11094,8 @@ class is used in a class pattern with positional arguments, each '00042' >>> "-42".zfill(5) '-0042' + + See also "rjust()". ''', 'strings': '''String and Bytes literals ************************* @@ -13338,13 +13452,13 @@ class instance has a namespace implemented as a dictionary which is See Function definitions for more information. ''', - 'typesmapping': r'''Mapping Types — "dict" -********************** + 'typesmapping': r'''Mapping types — "dict", "frozendict" +************************************ -A *mapping* object maps *hashable* values to arbitrary objects. -Mappings are mutable objects. There is currently only one standard -mapping type, the *dictionary*. (For other containers see the built- -in "list", "set", and "tuple" classes, and the "collections" module.) +A *mapping* object maps *hashable* values to arbitrary objects. There +are currently two standard mapping types, the *dictionary* and +"frozendict". (For other containers see the built-in "list", "set", +and "tuple" classes, and the "collections" module.) A dictionary’s keys are *almost* arbitrary values. Values that are not *hashable*, that is, values containing lists, dictionaries or @@ -13618,10 +13732,15 @@ class dict(iterable, /, **kwargs) Changed in version 3.8: Dictionaries are now reversible. + See also: + + "frozendict" and "types.MappingProxyType" can be used to create a + read-only view of a "dict". + See also: - "frozendict" and "types.MappingProxyType" can be used to create a read-only - view of a "dict". + For detailed information on thread-safety guarantees for "dict" + objects, see Thread safety for dict objects. Dictionary view objects @@ -13726,6 +13845,47 @@ class dict(iterable, /, **kwargs) mappingproxy({'bacon': 1, 'spam': 500}) >>> values.mapping['spam'] 500 + + +Frozen dictionaries +=================== + +class frozendict(**kwargs) +class frozendict(mapping, /, **kwargs) +class frozendict(iterable, /, **kwargs) + + Return a new frozen dictionary initialized from an optional + positional argument and a possibly empty set of keyword arguments. + + A "frozendict" has a similar API to the "dict" API, with the + following differences: + + * "dict" has more methods than "frozendict": + + * "__delitem__()" + + * "__setitem__()" + + * "clear()" + + * "pop()" + + * "popitem()" + + * "setdefault()" + + * "update()" + + * A "frozendict" can be hashed with "hash(frozendict)" if all keys + and values can be hashed. + + * "frozendict |= other" does not modify the "frozendict" in-place + but creates a new frozen dictionary. + + "frozendict" is not a "dict" subclass but inherits directly from + "object". + + Added in version 3.15.0a6 (unreleased). ''', 'typesmethods': r'''Methods ******* @@ -14175,75 +14335,10 @@ class list(iterable=(), /) empty for the duration, and raises "ValueError" if it can detect that the list has been mutated during a sort. -Thread safety: Reading a single element from a "list" is *atomic*: - - lst[i] # list.__getitem__ - -The following methods traverse the list and use *atomic* reads of each -item to perform their function. That means that they may return -results affected by concurrent modifications: - - item in lst - lst.index(item) - lst.count(item) - -All of the above methods/operations are also lock-free. They do not -block concurrent modifications. Other operations that hold a lock will -not block these from observing intermediate states.All other -operations from here on block using the per-object lock.Writing a -single item via "lst[i] = x" is safe to call from multiple threads and -will not corrupt the list.The following operations return new objects -and appear *atomic* to other threads: - - lst1 + lst2 # concatenates two lists into a new list - x * lst # repeats lst x times into a new list - lst.copy() # returns a shallow copy of the list - -Methods that only operate on a single elements with no shifting -required are *atomic*: - - lst.append(x) # append to the end of the list, no shifting required - lst.pop() # pop element from the end of the list, no shifting required - -The "clear()" method is also *atomic*. Other threads cannot observe -elements being removed.The "sort()" method is not *atomic*. Other -threads cannot observe intermediate states during sorting, but the -list appears empty for the duration of the sort.The following -operations may allow lock-free operations to observe intermediate -states since they modify multiple elements in place: - - lst.insert(idx, item) # shifts elements - lst.pop(idx) # idx not at the end of the list, shifts elements - lst *= x # copies elements in place - -The "remove()" method may allow concurrent modifications since element -comparison may execute arbitrary Python code (via -"__eq__()")."extend()" is safe to call from multiple threads. -However, its guarantees depend on the iterable passed to it. If it is -a "list", a "tuple", a "set", a "frozenset", a "dict" or a dictionary -view object (but not their subclasses), the "extend" operation is safe -from concurrent modifications to the iterable. Otherwise, an iterator -is created which can be concurrently modified by another thread. The -same applies to inplace concatenation of a list with other iterables -when using "lst += iterable".Similarly, assigning to a list slice with -"lst[i:j] = iterable" is safe to call from multiple threads, but -"iterable" is only locked when it is also a "list" (but not its -subclasses).Operations that involve multiple accesses, as well as -iteration, are never atomic. For example: - - # NOT atomic: read-modify-write - lst[i] = lst[i] + 1 - - # NOT atomic: check-then-act - if lst: - item = lst.pop() - - # NOT thread-safe: iteration while modifying - for item in lst: - process(item) # another thread may modify lst - -Consider external synchronization when sharing "list" instances across -threads. See Python support for free threading for more information. +See also: + + For detailed information on thread-safety guarantees for "list" + objects, see Thread safety for list objects. Tuples @@ -14615,9 +14710,9 @@ class range(start, stop, step=1, /) is semantically equivalent to: manager = (EXPRESSION) - enter = type(manager).__enter__ - exit = type(manager).__exit__ - value = enter(manager) + enter = manager.__enter__ + exit = manager.__exit__ + value = enter() hit_except = False try: @@ -14625,11 +14720,14 @@ class range(start, stop, step=1, /) SUITE except: hit_except = True - if not exit(manager, *sys.exc_info()): + if not exit(*sys.exc_info()): raise finally: if not hit_except: - exit(manager, None, None, None) + exit(None, None, None) + +except that implicit special method lookup is used for "__enter__()" +and "__exit__()". With more than one item, the context managers are processed as if multiple "with" statements were nested: diff --git a/Misc/NEWS.d/3.15.0a7.rst b/Misc/NEWS.d/3.15.0a7.rst new file mode 100644 index 00000000000000..7d9681cbcbef00 --- /dev/null +++ b/Misc/NEWS.d/3.15.0a7.rst @@ -0,0 +1,1212 @@ +.. date: 2026-03-10-09-46-44 +.. gh-issue: 145731 +.. nonce: 5uEGgb +.. release date: 2026-03-10 +.. section: Windows + +Fix negative timestamp during DST on Windows. Patch by Hugo van Kemenade. + +.. + +.. date: 2026-02-27-10-57-20 +.. gh-issue: 145307 +.. nonce: ueoT7j +.. section: Windows + +Defers loading of the ``psapi.dll`` module until it is used by +:func:`ctypes.util.dllist`. + +.. + +.. date: 2026-02-13-11-07-51 +.. gh-issue: 144551 +.. nonce: ENtMYD +.. section: Windows + +Updated bundled version of OpenSSL to 3.5.5. + +.. + +.. date: 2026-03-04-17-39-15 +.. gh-issue: 144741 +.. nonce: 0RHhBF +.. section: Tests + +Fix ``test_frame_pointer_unwind`` when Python is built with +:option:`--enable-shared`. Classify also libpython frames as ``"python"``. +Patch by Victor Stinner. + +.. + +.. date: 2026-02-12-12-12-00 +.. gh-issue: 144739 +.. nonce: -fx1tN +.. section: Tests + +When Python was compiled with system expat older then 2.7.2 but tests run +with newer expat, still skip +:class:`!test.test_pyexpat.MemoryProtectionTest`. + +.. + +.. date: 2026-03-04-18-59-17 +.. gh-issue: 145506 +.. nonce: 6hwvEh +.. section: Security + +Fixes :cve:`2026-2297` by ensuring that ``SourcelessFileLoader`` uses +:func:`io.open_code` when opening ``.pyc`` files. + +.. + +.. date: 2026-01-31-21-56-54 +.. gh-issue: 144370 +.. nonce: fp9m8t +.. section: Security + +Disallow usage of control characters in status in :mod:`wsgiref.handlers` to +prevent HTTP header injections. Patch by Benedikt Johannes. + +.. + +.. date: 2026-03-07-15-00-00 +.. gh-issue: 145623 +.. nonce: 2Y7LzT +.. section: Library + +Fix crash in :mod:`struct` when calling :func:`repr` or ``__sizeof__()`` on +an uninitialized :class:`struct.Struct` object created via +``Struct.__new__()`` without calling ``__init__()``. + +.. + +.. date: 2026-03-05-19-01-28 +.. gh-issue: 145551 +.. nonce: gItPRl +.. section: Library + +Fix InvalidStateError when cancelling process created by +:func:`asyncio.create_subprocess_exec` or +:func:`asyncio.create_subprocess_shell`. Patch by Daan De Meyer. + +.. + +.. date: 2026-03-05-16-06-09 +.. gh-issue: 141510 +.. nonce: dFPAQS +.. section: Library + +:mod:`marshal` now supports :class:`frozendict` objects. The marshal format +version was increased to 6. Patch by Victor Stinner. + +.. + +.. date: 2026-03-03-11-49-44 +.. gh-issue: 145417 +.. nonce: m_HxIL +.. section: Library + +:mod:`venv`: Prevent incorrect preservation of SELinux context when copying +the ``Activate.ps1`` script. The script inherited the SELinux security +context of the system template directory, rather than the destination +project directory. + +.. + +.. date: 2026-03-02-20-08-09 +.. gh-issue: 145335 +.. nonce: lVTBvd +.. section: Library + +``os.listdir(-1)`` and ``os.scandir(-1)`` now fail with +``OSError(errno.EBADF)`` rather than listing the current directory. +``os.listxattr(-1)`` now fails with ``OSError(errno.EBADF)`` rather than +listing extended attributes of the current directory. Patch by Victor +Stinner. + +.. + +.. date: 2026-03-02-19-41-39 +.. gh-issue: 145376 +.. nonce: OOzSOh +.. section: Library + +Fix double free and null pointer dereference in unusual error scenarios in +:mod:`hashlib` and :mod:`hmac` modules. + +.. + +.. date: 2026-02-28-00-55-00 +.. gh-issue: 145301 +.. nonce: Lk2bRl +.. section: Library + +:mod:`hmac`: fix a crash when the initialization of the underlying C +extension module fails. + +.. + +.. date: 2026-02-27-19-00-26 +.. gh-issue: 145301 +.. nonce: 2Wih4b +.. section: Library + +:mod:`hashlib`: fix a crash when the initialization of the underlying C +extension module fails. + +.. + +.. date: 2026-02-27-18-04-51 +.. gh-issue: 76007 +.. nonce: 17idfK +.. section: Library + +The ``version`` attribute of the :mod:`tarfile` module is deprecated and +slated for removal in Python 3.20. + +.. + +.. date: 2026-02-23-20-52-55 +.. gh-issue: 145158 +.. nonce: vWJtxI +.. section: Library + +Avoid undefined behaviour from signed integer overflow when parsing format +strings in the :mod:`struct` module. + +.. + +.. date: 2026-02-21-17-34-53 +.. gh-issue: 123853 +.. nonce: 6RUwWh +.. section: Library + +Removed Windows 95 compatibility for :func:`locale.getdefaultlocale`. + +.. + +.. date: 2026-02-20-13-03-10 +.. gh-issue: 66802 +.. nonce: OYcAi_ +.. section: Library + +Add :func:`unicodedata.block` function to return the `Unicode block +`_ +of a character. + +.. + +.. date: 2026-02-19-20-54-25 +.. gh-issue: 145033 +.. nonce: X9EBPQ +.. section: Library + +Add :data:`typing.TypeForm`, implementing :pep:`747`. Patch by Jelle +Zijlstra. + +.. + +.. date: 2026-02-19-18-02-54 +.. gh-issue: 141510 +.. nonce: qzvYsO +.. section: Library + +:func:`dataclasses.field`: if *metadata* is ``None``, use an empty +:class:`frozendict`, instead of a :func:`~types.MappingProxyType` of an +empty :class:`dict`. Patch by Victor Stinner. + +.. + +.. date: 2026-02-19-17-50-47 +.. gh-issue: 145006 +.. nonce: 9gqA0Q +.. section: Library + +Add :exc:`ModuleNotFoundError` hints when a module for a different ABI +exists. + +.. + +.. date: 2026-02-19-16-26-08 +.. gh-issue: 141510 +.. nonce: 4Qxy8_ +.. section: Library + +``ParameterizedMIMEHeader.params`` of :mod:`email.headerregistry` is now a +:class:`frozendict` instead of a :class:`types.MappingProxyType`. Patch by +Victor Stinner. + +.. + +.. date: 2026-02-19-15-42-06 +.. gh-issue: 134872 +.. nonce: sjYX1- +.. section: Library + +Add valid import name suggestions on :exc:`ModuleNotFoundError`. + +.. + +.. date: 2026-02-19-10-57-40 +.. gh-issue: 88091 +.. nonce: N7qGV- +.. section: Library + +Fix :func:`unicodedata.decomposition` for Hangul characters. + +.. + +.. date: 2026-02-19-00-00-00 +.. gh-issue: 144986 +.. nonce: atexit-leak +.. section: Library + +Fix a memory leak in :func:`atexit.register`. Patch by Shamil Abdulaev. + +.. + +.. date: 2026-02-18-13-45-00 +.. gh-issue: 144777 +.. nonce: R97q0a +.. section: Library + +Fix data races in :class:`io.IncrementalNewlineDecoder` in the +:term:`free-threaded build`. + +.. + +.. date: 2026-02-18-00-00-00 +.. gh-issue: 144809 +.. nonce: nYpEUx +.. section: Library + +Make :class:`collections.deque` copy atomic in the :term:`free-threaded +build`. + +.. + +.. date: 2026-02-17-11-28-37 +.. gh-issue: 141510 +.. nonce: OpAz0M +.. section: Library + +The :mod:`copy` module now supports the :class:`frozendict` type. Patch by +Pieter Eendebak based on work by Victor Stinner. + +.. + +.. date: 2026-02-17-11-15-17 +.. gh-issue: 141510 +.. nonce: ZmqEUb +.. section: Library + +The :mod:`json` module now supports the :class:`frozendict` type. Patch by +Victor Stinner. + +.. + +.. date: 2026-02-15-12-02-20 +.. gh-issue: 144835 +.. nonce: w_oS_J +.. section: Library + +Added missing explanations for some parameters in :func:`glob.glob` and +:func:`glob.iglob`. + +.. + +.. date: 2026-02-15-00-00-00 +.. gh-issue: 144833 +.. nonce: TUelo1 +.. section: Library + +Fixed a use-after-free in :mod:`ssl` when ``SSL_new()`` returns NULL in +``newPySSLSocket()``. The error was reported via a dangling pointer after +the object had already been freed. + +.. + +.. date: 2026-02-14-14-56-44 +.. gh-issue: 140715 +.. nonce: AbSheM +.. section: Library + +Add ``'%D'`` support to :meth:`~datetime.datetime.strptime`. + +.. + +.. date: 2026-02-13-14-20-10 +.. gh-issue: 144782 +.. nonce: 0Y8TKj +.. section: Library + +Fix :class:`argparse.ArgumentParser` to be :mod:`pickleable `. + +.. + +.. date: 2026-02-13-11-14-18 +.. gh-issue: 144763 +.. nonce: cDwnEE +.. section: Library + +Fix a race condition in :mod:`tracemalloc`: it no longer detaches the +attached thread state to acquire its internal lock. Patch by Victor Stinner. + +.. + +.. date: 2026-02-13-00-00-00 +.. gh-issue: 142224 +.. nonce: BidiMissing +.. section: Library + +:func:`unicodedata.bidirectional` now return the correct default bidi class +for unassigned code points. + +.. + +.. date: 2026-02-12-17-56-17 +.. gh-issue: 117865 +.. nonce: jE1ema +.. section: Library + +Reduce the import time of :mod:`inspect` module by ~20%. + +.. + +.. date: 2026-02-10-22-05-51 +.. gh-issue: 144156 +.. nonce: UbrC7F +.. section: Library + +Fix the folding of headers by the :mod:`email` library when :rfc:`2047` +encoded words are used. Now whitespace is correctly preserved and also +correctly added between adjacent encoded words. The latter property was +broken by the fix for gh-92081, which mostly fixed previous failures to +preserve whitespace. + +.. + +.. date: 2026-02-10-16-56-05 +.. gh-issue: 66305 +.. nonce: PZ6GN8 +.. section: Library + +Fixed a hang on Windows in the :mod:`tempfile` module when trying to create +a temporary file or subdirectory in a non-writable directory. + +.. + +.. date: 2026-02-09-02-16-36 +.. gh-issue: 144615 +.. nonce: s04x4n +.. section: Library + +Methods directly decorated with :deco:`functools.singledispatchmethod` now +dispatch on the second argument when called after being accessed as class +attributes. Patch by Bartosz Sławecki. + +.. + +.. date: 2026-02-08-17-09-10 +.. gh-issue: 144321 +.. nonce: w58PhQ +.. section: Library + +The functional syntax for creating :class:`typing.NamedTuple` classes now +supports passing any :term:`iterable` of fields and types. Previously, only +sequences were supported. + +.. + +.. date: 2026-02-07-16-37-42 +.. gh-issue: 144475 +.. nonce: 8tFEXw +.. section: Library + +Calling :func:`repr` on :func:`functools.partial` is now safer when the +partial object's internal attributes are replaced while the string +representation is being generated. + +.. + +.. date: 2026-02-07-16-31-42 +.. gh-issue: 144285 +.. nonce: iyH9iL +.. section: Library + +Attribute suggestions in :exc:`AttributeError` tracebacks are now formatted +differently to make them easier to understand, for example: ``Did you mean +'.datetime.now' instead of '.now'``. Contributed by Bartosz Sławecki. + +.. + +.. date: 2026-02-03-19-57-41 +.. gh-issue: 144316 +.. nonce: wop870 +.. section: Library + +Fix crash in ``_remote_debugging`` that caused ``test_external_inspection`` +to intermittently fail. Patch by Taegyun Kim. + +.. + +.. date: 2026-01-17-08-44-25 +.. gh-issue: 143637 +.. nonce: qyPqDo +.. section: Library + +Fixed a crash in socket.sendmsg() that could occur if ancillary data is +mutated re-entrantly during argument parsing. + +.. + +.. date: 2026-01-12-19-39-57 +.. gh-issue: 140652 +.. nonce: HvM9Bl +.. section: Library + +Fix a crash in :func:`!_interpchannels.list_all` after closing a channel. + +.. + +.. date: 2026-01-11-18-35-52 +.. gh-issue: 143698 +.. nonce: gXDzsJ +.. section: Library + +Allow *scheduler* and *setpgroup* arguments to be explicitly :const:`None` +when calling :func:`os.posix_spawn` or :func:`os.posix_spawnp`. Patch by +Bénédikt Tran. + +.. + +.. date: 2026-01-11-16-59-22 +.. gh-issue: 143698 +.. nonce: b-Cpeb +.. section: Library + +Raise :exc:`TypeError` instead of :exc:`SystemError` when the *scheduler* in +:func:`os.posix_spawn` or :func:`os.posix_spawnp` is not a tuple. Patch by +Bénédikt Tran. + +.. + +.. date: 2026-01-11-13-03-32 +.. gh-issue: 142516 +.. nonce: u7An-s +.. section: Library + +:mod:`ssl`: fix reference leaks in :class:`ssl.SSLContext` objects. Patch by +Bénédikt Tran. + +.. + +.. date: 2026-01-10-22-58-30 +.. gh-issue: 85809 +.. nonce: 0eW4wt +.. section: Library + +Added :term:`path-like object` support for :func:`shutil.make_archive`. + +.. + +.. date: 2026-01-01-05-26-00 +.. gh-issue: 143304 +.. nonce: Kv7x9Q +.. section: Library + +Fix :class:`ctypes.CDLL` to honor the ``handle`` parameter on POSIX systems. + +.. + +.. date: 2025-12-18-00-14-16 +.. gh-issue: 142781 +.. nonce: gcOeYF +.. section: Library + +:mod:`zoneinfo`: fix a crash when instantiating :class:`~zoneinfo.ZoneInfo` +objects for which the internal class-level cache is inconsistent. + +.. + +.. date: 2025-12-16-13-34-48 +.. gh-issue: 142787 +.. nonce: wNitJX +.. section: Library + +Fix assertion failure in :mod:`sqlite3` blob subscript when slicing with +indices that result in an empty slice. + +.. + +.. date: 2025-12-06-16-14-18 +.. gh-issue: 142352 +.. nonce: pW5HLX88 +.. section: Library + +Fix :meth:`asyncio.StreamWriter.start_tls` to transfer buffered data from +:class:`~asyncio.StreamReader` to the SSL layer, preventing data loss when +upgrading a connection to TLS mid-stream (e.g., when implementing PROXY +protocol support). + +.. + +.. date: 2025-10-10-14-08-58 +.. gh-issue: 139899 +.. nonce: 09leRY +.. section: Library + +Introduced :meth:`importlib.abc.MetaPathFinder.discover` and +:meth:`importlib.abc.PathEntryFinder.discover` to allow module and submodule +name discovery without assuming the use of traditional filesystem based +imports. + +.. + +.. date: 2025-08-04-23-20-43 +.. gh-issue: 137335 +.. nonce: IIjDJN +.. section: Library + +Get rid of any possibility of a name conflict for named pipes in +:mod:`multiprocessing` and :mod:`asyncio` on Windows, no matter how small. + +.. + +.. date: 2025-06-24-19-07-18 +.. gh-issue: 135883 +.. nonce: 38cePA +.. section: Library + +Fix :mod:`sqlite3`'s :ref:`interactive shell ` keeping part of +previous commands when scrolling history. + +.. + +.. date: 2024-09-30-15-31-59 +.. gh-issue: 124748 +.. nonce: KYzYFp +.. section: Library + +Improve :exc:`TypeError` error message when +:meth:`!weakref.WeakKeyDictionary.update` is used with keyword-only +parameters. + +.. + +.. date: 2023-02-05-20-02-30 +.. gh-issue: 80667 +.. nonce: 7LmzeA +.. section: Library + +Add support for Tangut Ideographs names in :mod:`unicodedata`. + +.. + +.. bpo: 42353 +.. date: 2022-02-05-00-15-03 +.. nonce: 0ebVGG +.. section: Library + +The :mod:`re` module gains a new :func:`re.prefixmatch` function as an +explicit spelling of what has to date always been known as :func:`re.match`. +:class:`re.Pattern` similary gains a :meth:`re.Pattern.prefixmatch` method. + +Why? Explicit is better than implicit. Other widely used languages all use +the term "match" to mean what Python uses the term "search" for. The +unadorened "match" name in Python has been a frequent case of confusion and +coding bugs due to the inconsistency with the rest if the software industry. + +We do not plan to deprecate and remove the older ``match`` name. + +.. + +.. bpo: 40243 +.. date: 2020-04-10-14-29-53 +.. nonce: 85HRib +.. section: Library + +Fix :meth:`!unicodedata.ucd_3_2_0.numeric` for non-decimal values. + +.. + +.. bpo: 40212 +.. date: 2020-04-07-05-09-34 +.. nonce: oPYeBs +.. section: Library + +Re-enable :func:`os.posix_fallocate` and :func:`os.posix_fadvise` on AIX. + +.. + +.. bpo: 3405 +.. date: 2018-05-11-12-26-16 +.. nonce: CacMw9 +.. section: Library + +Add support for user data of Tk virtual events and detail for ``Enter``, +``Leave``, ``FocusIn``, ``FocusOut``, and ``ConfigureRequest`` events to +:mod:`tkinter`. + +.. + +.. bpo: 32234 +.. date: 2017-12-15-09-32-57 +.. nonce: XaOkhR +.. section: Library + +:class:`mailbox.Mailbox` instances can now be used as a context manager. The +Mailbox is locked on context entry and unlocked and closed at context exit. + +.. + +.. date: 2026-03-03-08-18-00 +.. gh-issue: 145450 +.. nonce: VI7GXj +.. section: Documentation + +Document missing public :class:`wave.Wave_write` getter methods. + +.. + +.. date: 2026-01-06-16-04-08 +.. gh-issue: 110937 +.. nonce: SyO5lk +.. section: Documentation + +Document rest of full public :class:`importlib.metadata.Distribution` API. +Also add the (already documented) :class:`~importlib.metadata.PackagePath` +to ``__all__``. + +.. + +.. date: 2025-08-02-18-59-01 +.. gh-issue: 136246 +.. nonce: RIK7nE +.. section: Documentation + +A new "Improve this page" link is available in the left-hand sidebar of the +docs, offering links to create GitHub issues, discussion forum posts, or +pull requests. + +.. + +.. date: 2026-03-09-18-52-03 +.. gh-issue: 145701 +.. nonce: 79KQyO +.. section: Core and Builtins + +Fix :exc:`SystemError` when ``__classdict__`` or +``__conditional_annotations__`` is in a class-scope inlined comprehension. +Found by OSS Fuzz in :oss-fuzz:`491105000`. + +.. + +.. date: 2026-03-06-21-05-05 +.. gh-issue: 145615 +.. nonce: NKXXZgDW +.. section: Core and Builtins + +Fixed a memory leak in the :term:`free-threaded build` where mimalloc pages +could become permanently unreclaimable until the owning thread exited. + +.. + +.. date: 2026-03-06-01-36-20 +.. gh-issue: 116738 +.. nonce: OWVWRx +.. section: Core and Builtins + +Make :meth:`!mmap.mmap.set_name` thread-safe on the :term:`free threaded +` build. + +.. + +.. date: 2026-03-05-19-10-56 +.. gh-issue: 145566 +.. nonce: H4RupyYN +.. section: Core and Builtins + +In the free threading build, skip the stop-the-world pause when reassigning +``__class__`` on a newly created object. + +.. + +.. date: 2026-03-05-16-16-17 +.. gh-issue: 143055 +.. nonce: qDUFlY +.. section: Core and Builtins + +Fix crash in AST unparser when unparsing dict comprehension unpacking. Found +by OSS Fuzz in :oss-fuzz:`489790200`. + +.. + +.. date: 2026-03-01-13-37-31 +.. gh-issue: 145335 +.. nonce: e36kPJ +.. section: Core and Builtins + +Fix a crash in :func:`os.pathconf` when called with ``-1`` as the path +argument. + +.. + +.. date: 2026-02-28-16-46-17 +.. gh-issue: 145376 +.. nonce: lG5u1a +.. section: Core and Builtins + +Fix reference leaks in various unusual error scenarios. + +.. + +.. date: 2026-02-26-21-36-00 +.. gh-issue: 145234 +.. nonce: w0mQ9n +.. section: Core and Builtins + +Fixed a ``SystemError`` in the parser when an encoding cookie (for example, +UTF-7) decodes to carriage returns (``\r``). Newlines are now normalized +after decoding in the string tokenizer. + +Patch by Pablo Galindo. + +.. + +.. date: 2026-02-26-21-07-38 +.. gh-issue: 145275 +.. nonce: qE-3O1 +.. section: Core and Builtins + +Added the :option:`-X pathconfig_warnings<-X>` and +:envvar:`PYTHON_PATHCONFIG_WARNINGS` options, allowing to disable warnings +from :ref:`sys-path-init`. + +.. + +.. date: 2026-02-26-20-51-54 +.. gh-issue: 145273 +.. nonce: B5QcUp +.. section: Core and Builtins + +A warning is now shown during :ref:`sys-path-init` if it can't find a valid +standard library. + +.. + +.. date: 2026-02-26-18-00-00 +.. gh-issue: 145241 +.. nonce: hL2k9Q +.. section: Core and Builtins + +Specialized the parser error for when ``with`` items are followed by a +trailing comma (for example, ``with item,:``), raising a clearer +:exc:`SyntaxError` message. Patch by Pablo Galindo and Bartosz Sławecki. + +.. + +.. date: 2026-02-26-12-00-00 +.. gh-issue: 130555 +.. nonce: TMSOIu +.. section: Core and Builtins + +Fix use-after-free in :meth:`dict.clear` when the dictionary values are +embedded in an object and a destructor causes re-entrant mutation of the +dictionary. + +.. + +.. date: 2026-02-25-15-02-08 +.. gh-issue: 145197 +.. nonce: G6hAUk +.. section: Core and Builtins + +Fix JIT trace crash when recording function from cleared generator frame. + +.. + +.. date: 2026-02-24-18-30-56 +.. gh-issue: 145187 +.. nonce: YjPu1Z +.. section: Core and Builtins + +Fix compiler assertion fail when a type parameter bound contains an invalid +expression in a conditional block. + +.. + +.. date: 2026-02-23-23-18-28 +.. gh-issue: 145142 +.. nonce: T-XbVe +.. section: Core and Builtins + +Fix a crash in the free-threaded build when the dictionary argument to +:meth:`str.maketrans` is concurrently modified. + +.. + +.. date: 2026-02-22-22-05-09 +.. gh-issue: 145118 +.. nonce: TaKMJE +.. section: Core and Builtins + +:meth:`str.maketrans` now accepts :class:`frozendict`. + +.. + +.. date: 2026-02-22-20-15-00 +.. gh-issue: 144015 +.. nonce: pystrhex_simd +.. section: Core and Builtins + +Speed up :meth:`bytes.hex`, :meth:`bytearray.hex`, :func:`binascii.hexlify`, +and :mod:`hashlib` ``.hexdigest()`` operations with SIMD on x86-64, ARM64, +and ARM32 with NEON when built with gcc (version 12 or higher) or clang +(version 3 or higher) compilers. Around 1.1-3x faster for common 16-64 byte +inputs such as hashlib hex digests, and up to 8x faster for larger data. + +.. + +.. date: 2026-02-22-19-05-03 +.. gh-issue: 145118 +.. nonce: bU6Sic +.. section: Core and Builtins + +:func:`type` now accepts :class:`frozendict` as an argument. + +.. + +.. date: 2026-02-22-07-51-10 +.. gh-issue: 145064 +.. nonce: iIMGKA +.. section: Core and Builtins + +Fix JIT optimizer assertion failure during ``CALL_ALLOC_AND_ENTER_INIT`` +side exit. + +.. + +.. date: 2026-02-21-12-16-46 +.. gh-issue: 145055 +.. nonce: VyT-zI +.. section: Core and Builtins + +:func:`exec` and :func:`eval` now accept :class:`frozendict` for *globals*. +Patch by Victor Stinner. + +.. + +.. date: 2026-02-21-09-47-45 +.. gh-issue: 145058 +.. nonce: e-RBw- +.. section: Core and Builtins + +Fix a crash when :func:`!__lazy_import__` is passed a non-string argument, +by raising an :exc:`TypeError` instead. + +.. + +.. date: 2026-02-19-12-49-15 +.. gh-issue: 144995 +.. nonce: Ob2oYJ +.. section: Core and Builtins + +Optimize :class:`memoryview` comparison: a :class:`memoryview` is equal to +itself, there is no need to compare values. Patch by Victor Stinner. + +.. + +.. date: 2026-02-18-21-44-39 +.. gh-issue: 141510 +.. nonce: 7LST2O +.. section: Core and Builtins + +Update specializer to support frozendict. Patch by Donghee Na. + +.. + +.. date: 2026-02-17-22-27-11 +.. gh-issue: 141510 +.. nonce: -4yYsf +.. section: Core and Builtins + +Optimize :meth:`!frozendict.fromkeys` to avoid unnecessary thread-safety +operations in frozendict cases. Patch by Donghee Na. + +.. + +.. date: 2026-02-17-21-04-03 +.. gh-issue: 100239 +.. nonce: LyVabQ +.. section: Core and Builtins + +Speedup ``BINARY_OP_EXTEND`` for exact floats and medium-size integers by up +to 15%. Patch by Chris Eibl. + +.. + +.. date: 2026-02-17-18-27-28 +.. gh-issue: 144914 +.. nonce: DcXO4m +.. section: Core and Builtins + +Use ``mimalloc`` for raw memory allocations such as via +:c:func:`PyMem_RawMalloc` for better performance on :term:`free-threaded +builds `. Patch by Kumar Aditya. + +.. + +.. date: 2026-02-16-12-28-43 +.. gh-issue: 144872 +.. nonce: k9_Q30 +.. section: Core and Builtins + +Fix heap buffer overflow in the parser found by OSS-Fuzz. + +.. + +.. date: 2026-02-13-18-30-59 +.. gh-issue: 144766 +.. nonce: JGu3x3 +.. section: Core and Builtins + +Fix a crash in fork child process when perf support is enabled. + +.. + +.. date: 2026-02-13-12-00-00 +.. gh-issue: 144759 +.. nonce: d3qYpe +.. section: Core and Builtins + +Fix undefined behavior in the lexer when ``start`` and ``multi_line_start`` +pointers are ``NULL`` in ``_PyLexer_remember_fstring_buffers()`` and +``_PyLexer_restore_fstring_buffers()``. The ``NULL`` pointer arithmetic +(``NULL - valid_pointer``) is now guarded with explicit ``NULL`` checks. + +.. + +.. date: 2026-02-12-19-01-13 +.. gh-issue: 141510 +.. nonce: KlKjZg +.. section: Core and Builtins + +Add built-in :class:`frozendict` type. Patch by Victor Stinner. + +.. + +.. date: 2026-02-12-12-39-50 +.. gh-issue: 144681 +.. nonce: Ns2OT2 +.. section: Core and Builtins + +Fix a JIT assertion failure when a conditional branch jumps to the same +target as the fallthrough path. + +.. + +.. date: 2026-02-11-13-30-11 +.. gh-issue: 143300 +.. nonce: yjB63- +.. section: Core and Builtins + +Add :c:func:`PyUnstable_SetImmortal` C-API function to mark objects as +:term:`immortal`. + +.. + +.. date: 2026-02-11-11-28-25 +.. gh-issue: 144702 +.. nonce: XjFumv +.. section: Core and Builtins + +Clarify the error message raised when a class pattern is used to match on a +non-class object. + +.. + +.. date: 2026-02-08-13-14-00 +.. gh-issue: 144569 +.. nonce: pjlJVe +.. section: Core and Builtins + +Optimize ``BINARY_SLICE`` for list, tuple, and unicode by avoiding temporary +``slice`` object creation. + +.. + +.. date: 2026-02-06-21-45-52 +.. gh-issue: 144438 +.. nonce: GI_uB1LR +.. section: Core and Builtins + +Align the QSBR thread state array to a 64-byte cache line boundary to avoid +false sharing in the :term:`free-threaded build`. + +.. + +.. date: 2025-12-06-15-46-32 +.. gh-issue: 142349 +.. nonce: IdTuYL +.. section: Core and Builtins + +Implement :pep:`810`. Patch by Pablo Galindo and Dino Viehland. + +.. + +.. date: 2025-11-09-15-44-58 +.. gh-issue: 141226 +.. nonce: KTb_3F +.. section: Core and Builtins + +Deprecate :pep:`456` support for providing an external definition of the +string hashing scheme. Removal is scheduled for Python 3.19. Patch by +Bénédikt Tran. + +.. + +.. date: 2025-09-15-13-28-48 +.. gh-issue: 138912 +.. nonce: 61EYbn +.. section: Core and Builtins + +Improve :opcode:`MATCH_CLASS` performance by up to 52% in certain cases. +Patch by Marc Mueller. + +.. + +.. date: 2025-02-19-21-06-30 +.. gh-issue: 130327 +.. nonce: z3TaR8 +.. section: Core and Builtins + +Fix erroneous clearing of an object's :attr:`~object.__dict__` if +overwritten at runtime. + +.. + +.. date: 2023-07-26-00-03-00 +.. gh-issue: 80667 +.. nonce: N7Dh8B +.. section: Core and Builtins + +Literals using the ``\N{name}`` escape syntax can now construct CJK +ideographs and Hangul syllables using case-insensitive names. + +.. + +.. date: 2026-03-03-14-59-57 +.. gh-issue: 142417 +.. nonce: HiNP5j +.. section: C API + +Restore private provisional ``_Py_InitializeMain()`` function removed in +Python 3.14. Patch by Victor Stinner. + +.. + +.. date: 2026-02-24-14-46-05 +.. gh-issue: 144748 +.. nonce: uhnFtE +.. section: C API + +:c:func:`PyErr_CheckSignals` now raises the exception scheduled by +:c:func:`PyThreadState_SetAsyncExc`, if any. + +.. + +.. date: 2026-02-18-15-12-34 +.. gh-issue: 144981 +.. nonce: 4ZdM63 +.. section: C API + +Made :c:func:`PyUnstable_Code_SetExtra`, :c:func:`PyUnstable_Code_GetExtra`, +and :c:func:`PyUnstable_Eval_RequestCodeExtraIndex` thread-safe on the +:term:`free threaded ` build. + +.. + +.. date: 2026-02-12-19-03-31 +.. gh-issue: 141510 +.. nonce: U_1tjz +.. section: C API + +Add the following functions for the new :class:`frozendict` type: + +* :c:func:`PyAnyDict_Check` +* :c:func:`PyAnyDict_CheckExact` +* :c:func:`PyFrozenDict_Check` +* :c:func:`PyFrozenDict_CheckExact` +* :c:func:`PyFrozenDict_New` + +Patch by Victor Stinner. + +.. + +.. date: 2026-02-10-14-49-49 +.. gh-issue: 121617 +.. nonce: 57vMqa +.. section: C API + +``Python.h`` now also includes ```` in the limited C API version +3.11 and newer to fix the :c:macro:`Py_CLEAR` macro which uses ``memcpy()``. +Patch by Victor Stinner. + +.. + +.. date: 2026-01-27-18-15-15 +.. gh-issue: 144175 +.. nonce: qHK5Jf +.. section: C API + +Add :c:func:`PyArg_ParseArray` and :c:func:`PyArg_ParseArrayAndKeywords` +functions to parse arguments of functions using the :c:macro:`METH_FASTCALL` +calling convention. Patch by Victor Stinner. + +.. + +.. date: 2026-02-27-18-10-02 +.. gh-issue: 144533 +.. nonce: 21fk9L +.. section: Build + +Use wasmtime's ``--argv0`` to auto-discover sysconfig in WASI builds + +.. + +.. date: 2026-02-22-13-35-20 +.. gh-issue: 145110 +.. nonce: KgWofW +.. section: Build + +Fix targets "Clean" and "CLeanAll" in case of PGO builds on Windows. Patch +by Chris Eibl. + +.. + +.. date: 2026-02-10-18-26-04 +.. gh-issue: 144679 +.. nonce: FIH73W +.. section: Build + +When building with Visual Studio 2026 (Version 18), use PlatformToolSet v145 +by default. Patch by Chris Eibl. + +.. + +.. date: 2026-02-10-16-59-56 +.. gh-issue: 144675 +.. nonce: Wrf3Es +.. section: Build + +Update to WASI SDK 30. + +.. + +.. date: 2025-07-21-00-33-38 +.. gh-issue: 136677 +.. nonce: Y1_3ec +.. section: Build + +Introduce executable specific linker flags to ``./configure``. diff --git a/Misc/NEWS.d/next/Build/2025-07-21-00-33-38.gh-issue-136677.Y1_3ec.rst b/Misc/NEWS.d/next/Build/2025-07-21-00-33-38.gh-issue-136677.Y1_3ec.rst deleted file mode 100644 index 30addc4bf64d4b..00000000000000 --- a/Misc/NEWS.d/next/Build/2025-07-21-00-33-38.gh-issue-136677.Y1_3ec.rst +++ /dev/null @@ -1 +0,0 @@ -Introduce executable specific linker flags to ``./configure``. diff --git a/Misc/NEWS.d/next/Build/2026-02-10-16-59-56.gh-issue-144675.Wrf3Es.rst b/Misc/NEWS.d/next/Build/2026-02-10-16-59-56.gh-issue-144675.Wrf3Es.rst deleted file mode 100644 index 1018ed95a2af77..00000000000000 --- a/Misc/NEWS.d/next/Build/2026-02-10-16-59-56.gh-issue-144675.Wrf3Es.rst +++ /dev/null @@ -1 +0,0 @@ -Update to WASI SDK 30. diff --git a/Misc/NEWS.d/next/Build/2026-02-10-18-26-04.gh-issue-144679.FIH73W.rst b/Misc/NEWS.d/next/Build/2026-02-10-18-26-04.gh-issue-144679.FIH73W.rst deleted file mode 100644 index ebcfda54da39a7..00000000000000 --- a/Misc/NEWS.d/next/Build/2026-02-10-18-26-04.gh-issue-144679.FIH73W.rst +++ /dev/null @@ -1,2 +0,0 @@ -When building with Visual Studio 2026 (Version 18), use PlatformToolSet v145 -by default. Patch by Chris Eibl. diff --git a/Misc/NEWS.d/next/Build/2026-02-22-13-35-20.gh-issue-145110.KgWofW.rst b/Misc/NEWS.d/next/Build/2026-02-22-13-35-20.gh-issue-145110.KgWofW.rst deleted file mode 100644 index 035d0c141d36ed..00000000000000 --- a/Misc/NEWS.d/next/Build/2026-02-22-13-35-20.gh-issue-145110.KgWofW.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix targets "Clean" and "CLeanAll" in case of PGO builds on Windows. Patch by -Chris Eibl. diff --git a/Misc/NEWS.d/next/Build/2026-02-27-18-10-02.gh-issue-144533.21fk9L.rst b/Misc/NEWS.d/next/Build/2026-02-27-18-10-02.gh-issue-144533.21fk9L.rst deleted file mode 100644 index d6e0201b90c550..00000000000000 --- a/Misc/NEWS.d/next/Build/2026-02-27-18-10-02.gh-issue-144533.21fk9L.rst +++ /dev/null @@ -1 +0,0 @@ -Use wasmtime's ``--argv0`` to auto-discover sysconfig in WASI builds diff --git a/Misc/NEWS.d/next/C_API/2026-01-27-18-15-15.gh-issue-144175.qHK5Jf.rst b/Misc/NEWS.d/next/C_API/2026-01-27-18-15-15.gh-issue-144175.qHK5Jf.rst deleted file mode 100644 index da1e489bb3d2e5..00000000000000 --- a/Misc/NEWS.d/next/C_API/2026-01-27-18-15-15.gh-issue-144175.qHK5Jf.rst +++ /dev/null @@ -1,3 +0,0 @@ -Add :c:func:`PyArg_ParseArray` and :c:func:`PyArg_ParseArrayAndKeywords` -functions to parse arguments of functions using the :c:macro:`METH_FASTCALL` -calling convention. Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/C_API/2026-02-10-14-49-49.gh-issue-121617.57vMqa.rst b/Misc/NEWS.d/next/C_API/2026-02-10-14-49-49.gh-issue-121617.57vMqa.rst deleted file mode 100644 index cf84f8b1b0d36b..00000000000000 --- a/Misc/NEWS.d/next/C_API/2026-02-10-14-49-49.gh-issue-121617.57vMqa.rst +++ /dev/null @@ -1,3 +0,0 @@ -``Python.h`` now also includes ```` in the limited C API version 3.11 -and newer to fix the :c:macro:`Py_CLEAR` macro which uses ``memcpy()``. Patch -by Victor Stinner. diff --git a/Misc/NEWS.d/next/C_API/2026-02-12-19-03-31.gh-issue-141510.U_1tjz.rst b/Misc/NEWS.d/next/C_API/2026-02-12-19-03-31.gh-issue-141510.U_1tjz.rst deleted file mode 100644 index 57a25fe045f04c..00000000000000 --- a/Misc/NEWS.d/next/C_API/2026-02-12-19-03-31.gh-issue-141510.U_1tjz.rst +++ /dev/null @@ -1,9 +0,0 @@ -Add the following functions for the new :class:`frozendict` type: - -* :c:func:`PyAnyDict_Check` -* :c:func:`PyAnyDict_CheckExact` -* :c:func:`PyFrozenDict_Check` -* :c:func:`PyFrozenDict_CheckExact` -* :c:func:`PyFrozenDict_New` - -Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/C_API/2026-02-18-15-12-34.gh-issue-144981.4ZdM63.rst b/Misc/NEWS.d/next/C_API/2026-02-18-15-12-34.gh-issue-144981.4ZdM63.rst deleted file mode 100644 index d86886ab09704a..00000000000000 --- a/Misc/NEWS.d/next/C_API/2026-02-18-15-12-34.gh-issue-144981.4ZdM63.rst +++ /dev/null @@ -1,3 +0,0 @@ -Made :c:func:`PyUnstable_Code_SetExtra`, :c:func:`PyUnstable_Code_GetExtra`, -and :c:func:`PyUnstable_Eval_RequestCodeExtraIndex` thread-safe on the -:term:`free threaded ` build. diff --git a/Misc/NEWS.d/next/C_API/2026-02-24-14-46-05.gh-issue-144748.uhnFtE.rst b/Misc/NEWS.d/next/C_API/2026-02-24-14-46-05.gh-issue-144748.uhnFtE.rst deleted file mode 100644 index bda7003be94e54..00000000000000 --- a/Misc/NEWS.d/next/C_API/2026-02-24-14-46-05.gh-issue-144748.uhnFtE.rst +++ /dev/null @@ -1,2 +0,0 @@ -:c:func:`PyErr_CheckSignals` now raises the exception scheduled by -:c:func:`PyThreadState_SetAsyncExc`, if any. diff --git a/Misc/NEWS.d/next/C_API/2026-03-03-14-59-57.gh-issue-142417.HiNP5j.rst b/Misc/NEWS.d/next/C_API/2026-03-03-14-59-57.gh-issue-142417.HiNP5j.rst deleted file mode 100644 index 943be5b4533d9e..00000000000000 --- a/Misc/NEWS.d/next/C_API/2026-03-03-14-59-57.gh-issue-142417.HiNP5j.rst +++ /dev/null @@ -1,2 +0,0 @@ -Restore private provisional ``_Py_InitializeMain()`` function removed in -Python 3.14. Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2023-07-26-00-03-00.gh-issue-80667.N7Dh8B.rst b/Misc/NEWS.d/next/Core_and_Builtins/2023-07-26-00-03-00.gh-issue-80667.N7Dh8B.rst deleted file mode 100644 index db87a5ed9c7fc2..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2023-07-26-00-03-00.gh-issue-80667.N7Dh8B.rst +++ /dev/null @@ -1,2 +0,0 @@ -Literals using the ``\N{name}`` escape syntax can now construct CJK -ideographs and Hangul syllables using case-insensitive names. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-02-19-21-06-30.gh-issue-130327.z3TaR8.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-02-19-21-06-30.gh-issue-130327.z3TaR8.rst deleted file mode 100644 index 9b9a282b5ab414..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2025-02-19-21-06-30.gh-issue-130327.z3TaR8.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix erroneous clearing of an object's :attr:`~object.__dict__` if -overwritten at runtime. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-09-15-13-28-48.gh-issue-138912.61EYbn.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-09-15-13-28-48.gh-issue-138912.61EYbn.rst deleted file mode 100644 index f5d312a289fe21..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2025-09-15-13-28-48.gh-issue-138912.61EYbn.rst +++ /dev/null @@ -1 +0,0 @@ -Improve :opcode:`MATCH_CLASS` performance by up to 52% in certain cases. Patch by Marc Mueller. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-11-09-15-44-58.gh-issue-141226.KTb_3F.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-11-09-15-44-58.gh-issue-141226.KTb_3F.rst deleted file mode 100644 index 3f7ce7326187d4..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2025-11-09-15-44-58.gh-issue-141226.KTb_3F.rst +++ /dev/null @@ -1,3 +0,0 @@ -Deprecate :pep:`456` support for providing an external definition -of the string hashing scheme. Removal is scheduled for Python 3.19. -Patch by Bénédikt Tran. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-06-15-46-32.gh-issue-142349.IdTuYL.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-06-15-46-32.gh-issue-142349.IdTuYL.rst deleted file mode 100644 index 73cc167fd04013..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-06-15-46-32.gh-issue-142349.IdTuYL.rst +++ /dev/null @@ -1 +0,0 @@ -Implement :pep:`810`. Patch by Pablo Galindo and Dino Viehland. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-06-21-45-52.gh-issue-144438.GI_uB1LR.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-06-21-45-52.gh-issue-144438.GI_uB1LR.rst deleted file mode 100644 index 3e33e461ae8b5a..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-06-21-45-52.gh-issue-144438.GI_uB1LR.rst +++ /dev/null @@ -1,2 +0,0 @@ -Align the QSBR thread state array to a 64-byte cache line boundary to -avoid false sharing in the :term:`free-threaded build`. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-08-13-14-00.gh-issue-144569.pjlJVe.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-08-13-14-00.gh-issue-144569.pjlJVe.rst deleted file mode 100644 index bdd0d6c2f7b944..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-08-13-14-00.gh-issue-144569.pjlJVe.rst +++ /dev/null @@ -1 +0,0 @@ -Optimize ``BINARY_SLICE`` for list, tuple, and unicode by avoiding temporary ``slice`` object creation. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-11-11-28-25.gh-issue-144702.XjFumv.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-11-11-28-25.gh-issue-144702.XjFumv.rst deleted file mode 100644 index 01d2b6570ded96..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-11-11-28-25.gh-issue-144702.XjFumv.rst +++ /dev/null @@ -1,2 +0,0 @@ -Clarify the error message raised when a class pattern is used to match on a -non-class object. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-11-13-30-11.gh-issue-143300.yjB63-.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-11-13-30-11.gh-issue-143300.yjB63-.rst deleted file mode 100644 index 85c75a224e42fc..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-11-13-30-11.gh-issue-143300.yjB63-.rst +++ /dev/null @@ -1 +0,0 @@ -Add :c:func:`PyUnstable_SetImmortal` C-API function to mark objects as :term:`immortal`. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-12-12-39-50.gh-issue-144681.Ns2OT2.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-12-12-39-50.gh-issue-144681.Ns2OT2.rst deleted file mode 100644 index c8ca7a7fa194ee..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-12-12-39-50.gh-issue-144681.Ns2OT2.rst +++ /dev/null @@ -1 +0,0 @@ -Fix a JIT assertion failure when a conditional branch jumps to the same target as the fallthrough path. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-12-19-01-13.gh-issue-141510.KlKjZg.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-12-19-01-13.gh-issue-141510.KlKjZg.rst deleted file mode 100644 index 4596e273fc6118..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-12-19-01-13.gh-issue-141510.KlKjZg.rst +++ /dev/null @@ -1 +0,0 @@ -Add built-in :class:`frozendict` type. Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-13-12-00-00.gh-issue-144759.d3qYpe.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-13-12-00-00.gh-issue-144759.d3qYpe.rst deleted file mode 100644 index 46786d0672b0a8..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-13-12-00-00.gh-issue-144759.d3qYpe.rst +++ /dev/null @@ -1,4 +0,0 @@ -Fix undefined behavior in the lexer when ``start`` and ``multi_line_start`` -pointers are ``NULL`` in ``_PyLexer_remember_fstring_buffers()`` and -``_PyLexer_restore_fstring_buffers()``. The ``NULL`` pointer arithmetic -(``NULL - valid_pointer``) is now guarded with explicit ``NULL`` checks. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-13-18-30-59.gh-issue-144766.JGu3x3.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-13-18-30-59.gh-issue-144766.JGu3x3.rst deleted file mode 100644 index d9613c95af1915..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-13-18-30-59.gh-issue-144766.JGu3x3.rst +++ /dev/null @@ -1 +0,0 @@ -Fix a crash in fork child process when perf support is enabled. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-16-12-28-43.gh-issue-144872.k9_Q30.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-16-12-28-43.gh-issue-144872.k9_Q30.rst deleted file mode 100644 index c06bf01baee6fd..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-16-12-28-43.gh-issue-144872.k9_Q30.rst +++ /dev/null @@ -1 +0,0 @@ -Fix heap buffer overflow in the parser found by OSS-Fuzz. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-18-27-28.gh-issue-144914.DcXO4m.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-18-27-28.gh-issue-144914.DcXO4m.rst deleted file mode 100644 index f13b8541a0ebe2..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-18-27-28.gh-issue-144914.DcXO4m.rst +++ /dev/null @@ -1 +0,0 @@ -Use ``mimalloc`` for raw memory allocations such as via :c:func:`PyMem_RawMalloc` for better performance on :term:`free-threaded builds `. Patch by Kumar Aditya. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst deleted file mode 100644 index 3cfc3e930d1e9d..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst +++ /dev/null @@ -1,2 +0,0 @@ -Speedup ``BINARY_OP_EXTEND`` for exact floats and medium-size integers by up -to 15%. Patch by Chris Eibl. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-22-27-11.gh-issue-141510.-4yYsf.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-22-27-11.gh-issue-141510.-4yYsf.rst deleted file mode 100644 index b031fb3c75dea7..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-22-27-11.gh-issue-141510.-4yYsf.rst +++ /dev/null @@ -1,2 +0,0 @@ -Optimize :meth:`!frozendict.fromkeys` to avoid unnecessary thread-safety operations -in frozendict cases. Patch by Donghee Na. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-18-21-44-39.gh-issue-141510.7LST2O.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-18-21-44-39.gh-issue-141510.7LST2O.rst deleted file mode 100644 index 87d6a2a6df96a1..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-18-21-44-39.gh-issue-141510.7LST2O.rst +++ /dev/null @@ -1 +0,0 @@ -Update specializer to support frozendict. Patch by Donghee Na. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-19-12-49-15.gh-issue-144995.Ob2oYJ.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-19-12-49-15.gh-issue-144995.Ob2oYJ.rst deleted file mode 100644 index 83d84b9505c5a5..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-19-12-49-15.gh-issue-144995.Ob2oYJ.rst +++ /dev/null @@ -1,2 +0,0 @@ -Optimize :class:`memoryview` comparison: a :class:`memoryview` is equal to -itself, there is no need to compare values. Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-21-09-47-45.gh-issue-145058.e-RBw-.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-21-09-47-45.gh-issue-145058.e-RBw-.rst deleted file mode 100644 index 05eb296f96ec6d..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-21-09-47-45.gh-issue-145058.e-RBw-.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix a crash when :func:`!__lazy_import__` is passed a non-string argument, -by raising an :exc:`TypeError` instead. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-21-12-16-46.gh-issue-145055.VyT-zI.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-21-12-16-46.gh-issue-145055.VyT-zI.rst deleted file mode 100644 index c9daaa27717ed0..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-21-12-16-46.gh-issue-145055.VyT-zI.rst +++ /dev/null @@ -1,2 +0,0 @@ -:func:`exec` and :func:`eval` now accept :class:`frozendict` for *globals*. -Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-07-51-10.gh-issue-145064.iIMGKA.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-07-51-10.gh-issue-145064.iIMGKA.rst deleted file mode 100644 index 1f298e164f4488..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-07-51-10.gh-issue-145064.iIMGKA.rst +++ /dev/null @@ -1 +0,0 @@ -Fix JIT optimizer assertion failure during ``CALL_ALLOC_AND_ENTER_INIT`` side exit. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-19-05-03.gh-issue-145118.bU6Sic.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-19-05-03.gh-issue-145118.bU6Sic.rst deleted file mode 100644 index 24507d4a411f85..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-19-05-03.gh-issue-145118.bU6Sic.rst +++ /dev/null @@ -1 +0,0 @@ -:func:`type` now accepts :class:`frozendict` as an argument. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-20-15-00.gh-issue-144015.pystrhex_simd.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-20-15-00.gh-issue-144015.pystrhex_simd.rst deleted file mode 100644 index 122315e031bc87..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-20-15-00.gh-issue-144015.pystrhex_simd.rst +++ /dev/null @@ -1,5 +0,0 @@ -Speed up :meth:`bytes.hex`, :meth:`bytearray.hex`, :func:`binascii.hexlify`, -and :mod:`hashlib` ``.hexdigest()`` operations with SIMD on x86-64, ARM64, -and ARM32 with NEON when built with gcc (version 12 or higher) or clang -(version 3 or higher) compilers. Around 1.1-3x faster for common 16-64 byte -inputs such as hashlib hex digests, and up to 8x faster for larger data. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-22-05-09.gh-issue-145118.TaKMJE.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-22-05-09.gh-issue-145118.TaKMJE.rst deleted file mode 100644 index fccc3bc2a1804e..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-22-22-05-09.gh-issue-145118.TaKMJE.rst +++ /dev/null @@ -1 +0,0 @@ -:meth:`str.maketrans` now accepts :class:`frozendict`. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-23-23-18-28.gh-issue-145142.T-XbVe.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-23-23-18-28.gh-issue-145142.T-XbVe.rst deleted file mode 100644 index 5f6043cc3d9660..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-23-23-18-28.gh-issue-145142.T-XbVe.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix a crash in the free-threaded build when the dictionary argument to -:meth:`str.maketrans` is concurrently modified. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-24-18-30-56.gh-issue-145187.YjPu1Z.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-24-18-30-56.gh-issue-145187.YjPu1Z.rst deleted file mode 100644 index 08c6b44164ebc3..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-24-18-30-56.gh-issue-145187.YjPu1Z.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix compiler assertion fail when a type parameter bound contains an invalid -expression in a conditional block. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-25-15-02-08.gh-issue-145197.G6hAUk.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-25-15-02-08.gh-issue-145197.G6hAUk.rst deleted file mode 100644 index 6d6afe5abfea9c..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-25-15-02-08.gh-issue-145197.G6hAUk.rst +++ /dev/null @@ -1 +0,0 @@ -Fix JIT trace crash when recording function from cleared generator frame. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-12-00-00.gh-issue-130555.TMSOIu.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-12-00-00.gh-issue-130555.TMSOIu.rst deleted file mode 100644 index 5a2106480fb843..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-12-00-00.gh-issue-130555.TMSOIu.rst +++ /dev/null @@ -1,3 +0,0 @@ -Fix use-after-free in :meth:`dict.clear` when the dictionary values are -embedded in an object and a destructor causes re-entrant mutation of the -dictionary. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-18-00-00.gh-issue-145241.hL2k9Q.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-18-00-00.gh-issue-145241.hL2k9Q.rst deleted file mode 100644 index a3253132a577ba..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-18-00-00.gh-issue-145241.hL2k9Q.rst +++ /dev/null @@ -1,3 +0,0 @@ -Specialized the parser error for when ``with`` items are followed -by a trailing comma (for example, ``with item,:``), raising a clearer -:exc:`SyntaxError` message. Patch by Pablo Galindo and Bartosz Sławecki. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-20-51-54.gh-issue-145273.B5QcUp.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-20-51-54.gh-issue-145273.B5QcUp.rst deleted file mode 100644 index 8d9e4a872d0d7a..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-20-51-54.gh-issue-145273.B5QcUp.rst +++ /dev/null @@ -1,2 +0,0 @@ -A warning is now shown during :ref:`sys-path-init` if it can't find a valid -standard library. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-21-07-38.gh-issue-145275.qE-3O1.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-21-07-38.gh-issue-145275.qE-3O1.rst deleted file mode 100644 index 1723a7c8c10717..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-21-07-38.gh-issue-145275.qE-3O1.rst +++ /dev/null @@ -1,3 +0,0 @@ -Added the :option:`-X pathconfig_warnings<-X>` and -:envvar:`PYTHON_PATHCONFIG_WARNINGS` options, allowing to disable warnings -from :ref:`sys-path-init`. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-21-36-00.gh-issue-145234.w0mQ9n.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-21-36-00.gh-issue-145234.w0mQ9n.rst deleted file mode 100644 index caeffff0be8a85..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-26-21-36-00.gh-issue-145234.w0mQ9n.rst +++ /dev/null @@ -1,5 +0,0 @@ -Fixed a ``SystemError`` in the parser when an encoding cookie (for example, -UTF-7) decodes to carriage returns (``\r``). Newlines are now normalized after -decoding in the string tokenizer. - -Patch by Pablo Galindo. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-16-46-17.gh-issue-145376.lG5u1a.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-16-46-17.gh-issue-145376.lG5u1a.rst deleted file mode 100644 index a5a6908757e458..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-16-46-17.gh-issue-145376.lG5u1a.rst +++ /dev/null @@ -1 +0,0 @@ -Fix reference leaks in various unusual error scenarios. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-01-13-37-31.gh-issue-145335.e36kPJ.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-01-13-37-31.gh-issue-145335.e36kPJ.rst deleted file mode 100644 index 42ed85c7da31ac..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-01-13-37-31.gh-issue-145335.e36kPJ.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix a crash in :func:`os.pathconf` when called with ``-1`` as the path -argument. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-05-16-16-17.gh-issue-143055.qDUFlY.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-05-16-16-17.gh-issue-143055.qDUFlY.rst deleted file mode 100644 index 9b55459bffdea8..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-05-16-16-17.gh-issue-143055.qDUFlY.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix crash in AST unparser when unparsing dict comprehension unpacking. -Found by OSS Fuzz in :oss-fuzz:`489790200`. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-05-19-10-56.gh-issue-145566.H4RupyYN.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-05-19-10-56.gh-issue-145566.H4RupyYN.rst deleted file mode 100644 index 723b81ddc5f897..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-05-19-10-56.gh-issue-145566.H4RupyYN.rst +++ /dev/null @@ -1,2 +0,0 @@ -In the free threading build, skip the stop-the-world pause when reassigning -``__class__`` on a newly created object. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-06-01-36-20.gh-issue-116738.OWVWRx.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-06-01-36-20.gh-issue-116738.OWVWRx.rst deleted file mode 100644 index 212fd7b02902e9..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-06-01-36-20.gh-issue-116738.OWVWRx.rst +++ /dev/null @@ -1,2 +0,0 @@ -Make :meth:`!mmap.mmap.set_name` thread-safe on the :term:`free threaded ` build. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-06-21-05-05.gh-issue-145615.NKXXZgDW.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-06-21-05-05.gh-issue-145615.NKXXZgDW.rst deleted file mode 100644 index 2183eef618daae..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-06-21-05-05.gh-issue-145615.NKXXZgDW.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fixed a memory leak in the :term:`free-threaded build` where mimalloc pages -could become permanently unreclaimable until the owning thread exited. diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-09-18-52-03.gh-issue-145701.79KQyO.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-09-18-52-03.gh-issue-145701.79KQyO.rst deleted file mode 100644 index 23796082fb616f..00000000000000 --- a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-09-18-52-03.gh-issue-145701.79KQyO.rst +++ /dev/null @@ -1,3 +0,0 @@ -Fix :exc:`SystemError` when ``__classdict__`` or -``__conditional_annotations__`` is in a class-scope inlined comprehension. -Found by OSS Fuzz in :oss-fuzz:`491105000`. diff --git a/Misc/NEWS.d/next/Documentation/2025-08-02-18-59-01.gh-issue-136246.RIK7nE.rst b/Misc/NEWS.d/next/Documentation/2025-08-02-18-59-01.gh-issue-136246.RIK7nE.rst deleted file mode 100644 index 5f83785df13209..00000000000000 --- a/Misc/NEWS.d/next/Documentation/2025-08-02-18-59-01.gh-issue-136246.RIK7nE.rst +++ /dev/null @@ -1,3 +0,0 @@ -A new "Improve this page" link is available in the left-hand sidebar of the -docs, offering links to create GitHub issues, discussion forum posts, or -pull requests. diff --git a/Misc/NEWS.d/next/Documentation/2026-01-06-16-04-08.gh-issue-110937.SyO5lk.rst b/Misc/NEWS.d/next/Documentation/2026-01-06-16-04-08.gh-issue-110937.SyO5lk.rst deleted file mode 100644 index d29bde5ca690c6..00000000000000 --- a/Misc/NEWS.d/next/Documentation/2026-01-06-16-04-08.gh-issue-110937.SyO5lk.rst +++ /dev/null @@ -1 +0,0 @@ -Document rest of full public :class:`importlib.metadata.Distribution` API. Also add the (already documented) :class:`~importlib.metadata.PackagePath` to ``__all__``. diff --git a/Misc/NEWS.d/next/Documentation/2026-03-03-08-18-00.gh-issue-145450.VI7GXj.rst b/Misc/NEWS.d/next/Documentation/2026-03-03-08-18-00.gh-issue-145450.VI7GXj.rst deleted file mode 100644 index 681c932b34a05d..00000000000000 --- a/Misc/NEWS.d/next/Documentation/2026-03-03-08-18-00.gh-issue-145450.VI7GXj.rst +++ /dev/null @@ -1 +0,0 @@ -Document missing public :class:`wave.Wave_write` getter methods. diff --git a/Misc/NEWS.d/next/Library/2017-12-15-09-32-57.bpo-32234.XaOkhR.rst b/Misc/NEWS.d/next/Library/2017-12-15-09-32-57.bpo-32234.XaOkhR.rst deleted file mode 100644 index b22289835620df..00000000000000 --- a/Misc/NEWS.d/next/Library/2017-12-15-09-32-57.bpo-32234.XaOkhR.rst +++ /dev/null @@ -1,2 +0,0 @@ -:class:`mailbox.Mailbox` instances can now be used as a context manager. -The Mailbox is locked on context entry and unlocked and closed at context exit. diff --git a/Misc/NEWS.d/next/Library/2018-05-11-12-26-16.bpo-3405.CacMw9.rst b/Misc/NEWS.d/next/Library/2018-05-11-12-26-16.bpo-3405.CacMw9.rst deleted file mode 100644 index bf97bf0231fc0a..00000000000000 --- a/Misc/NEWS.d/next/Library/2018-05-11-12-26-16.bpo-3405.CacMw9.rst +++ /dev/null @@ -1,3 +0,0 @@ -Add support for user data of Tk virtual events and detail for -``Enter``, ``Leave``, ``FocusIn``, ``FocusOut``, and -``ConfigureRequest`` events to :mod:`tkinter`. diff --git a/Misc/NEWS.d/next/Library/2020-04-07-05-09-34.bpo-40212.oPYeBs.rst b/Misc/NEWS.d/next/Library/2020-04-07-05-09-34.bpo-40212.oPYeBs.rst deleted file mode 100644 index 2e9c3d81180e6a..00000000000000 --- a/Misc/NEWS.d/next/Library/2020-04-07-05-09-34.bpo-40212.oPYeBs.rst +++ /dev/null @@ -1 +0,0 @@ -Re-enable :func:`os.posix_fallocate` and :func:`os.posix_fadvise` on AIX. diff --git a/Misc/NEWS.d/next/Library/2020-04-10-14-29-53.bpo-40243.85HRib.rst b/Misc/NEWS.d/next/Library/2020-04-10-14-29-53.bpo-40243.85HRib.rst deleted file mode 100644 index 1f48525cdbecd0..00000000000000 --- a/Misc/NEWS.d/next/Library/2020-04-10-14-29-53.bpo-40243.85HRib.rst +++ /dev/null @@ -1 +0,0 @@ -Fix :meth:`!unicodedata.ucd_3_2_0.numeric` for non-decimal values. diff --git a/Misc/NEWS.d/next/Library/2022-02-05-00-15-03.bpo-42353.0ebVGG.rst b/Misc/NEWS.d/next/Library/2022-02-05-00-15-03.bpo-42353.0ebVGG.rst deleted file mode 100644 index a3e0a3e14af1fa..00000000000000 --- a/Misc/NEWS.d/next/Library/2022-02-05-00-15-03.bpo-42353.0ebVGG.rst +++ /dev/null @@ -1,10 +0,0 @@ -The :mod:`re` module gains a new :func:`re.prefixmatch` function as an -explicit spelling of what has to date always been known as :func:`re.match`. -:class:`re.Pattern` similary gains a :meth:`re.Pattern.prefixmatch` method. - -Why? Explicit is better than implicit. Other widely used languages all use -the term "match" to mean what Python uses the term "search" for. The -unadorened "match" name in Python has been a frequent case of confusion and -coding bugs due to the inconsistency with the rest if the software industry. - -We do not plan to deprecate and remove the older ``match`` name. diff --git a/Misc/NEWS.d/next/Library/2023-02-05-20-02-30.gh-issue-80667.7LmzeA.rst b/Misc/NEWS.d/next/Library/2023-02-05-20-02-30.gh-issue-80667.7LmzeA.rst deleted file mode 100644 index f82f1eeb0589c6..00000000000000 --- a/Misc/NEWS.d/next/Library/2023-02-05-20-02-30.gh-issue-80667.7LmzeA.rst +++ /dev/null @@ -1 +0,0 @@ -Add support for Tangut Ideographs names in :mod:`unicodedata`. diff --git a/Misc/NEWS.d/next/Library/2024-09-30-15-31-59.gh-issue-124748.KYzYFp.rst b/Misc/NEWS.d/next/Library/2024-09-30-15-31-59.gh-issue-124748.KYzYFp.rst deleted file mode 100644 index 5067db357fc577..00000000000000 --- a/Misc/NEWS.d/next/Library/2024-09-30-15-31-59.gh-issue-124748.KYzYFp.rst +++ /dev/null @@ -1,2 +0,0 @@ -Improve :exc:`TypeError` error message when :meth:`!weakref.WeakKeyDictionary.update` -is used with keyword-only parameters. diff --git a/Misc/NEWS.d/next/Library/2025-06-24-19-07-18.gh-issue-135883.38cePA.rst b/Misc/NEWS.d/next/Library/2025-06-24-19-07-18.gh-issue-135883.38cePA.rst deleted file mode 100644 index 8f3efceaae1d91..00000000000000 --- a/Misc/NEWS.d/next/Library/2025-06-24-19-07-18.gh-issue-135883.38cePA.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix :mod:`sqlite3`'s :ref:`interactive shell ` keeping part of -previous commands when scrolling history. diff --git a/Misc/NEWS.d/next/Library/2025-08-04-23-20-43.gh-issue-137335.IIjDJN.rst b/Misc/NEWS.d/next/Library/2025-08-04-23-20-43.gh-issue-137335.IIjDJN.rst deleted file mode 100644 index 2311ace10e411d..00000000000000 --- a/Misc/NEWS.d/next/Library/2025-08-04-23-20-43.gh-issue-137335.IIjDJN.rst +++ /dev/null @@ -1,2 +0,0 @@ -Get rid of any possibility of a name conflict for named pipes in -:mod:`multiprocessing` and :mod:`asyncio` on Windows, no matter how small. diff --git a/Misc/NEWS.d/next/Library/2025-10-10-14-08-58.gh-issue-139899.09leRY.rst b/Misc/NEWS.d/next/Library/2025-10-10-14-08-58.gh-issue-139899.09leRY.rst deleted file mode 100644 index fe5e7d17ab6c8c..00000000000000 --- a/Misc/NEWS.d/next/Library/2025-10-10-14-08-58.gh-issue-139899.09leRY.rst +++ /dev/null @@ -1,3 +0,0 @@ -Introduced :meth:`importlib.abc.MetaPathFinder.discover` -and :meth:`importlib.abc.PathEntryFinder.discover` to allow module and submodule -name discovery without assuming the use of traditional filesystem based imports. diff --git a/Misc/NEWS.d/next/Library/2025-12-06-16-14-18.gh-issue-142352.pW5HLX88.rst b/Misc/NEWS.d/next/Library/2025-12-06-16-14-18.gh-issue-142352.pW5HLX88.rst deleted file mode 100644 index 13e38b118175b4..00000000000000 --- a/Misc/NEWS.d/next/Library/2025-12-06-16-14-18.gh-issue-142352.pW5HLX88.rst +++ /dev/null @@ -1,4 +0,0 @@ -Fix :meth:`asyncio.StreamWriter.start_tls` to transfer buffered data from -:class:`~asyncio.StreamReader` to the SSL layer, preventing data loss when -upgrading a connection to TLS mid-stream (e.g., when implementing PROXY -protocol support). diff --git a/Misc/NEWS.d/next/Library/2025-12-16-13-34-48.gh-issue-142787.wNitJX.rst b/Misc/NEWS.d/next/Library/2025-12-16-13-34-48.gh-issue-142787.wNitJX.rst deleted file mode 100644 index e928bd2cac72a8..00000000000000 --- a/Misc/NEWS.d/next/Library/2025-12-16-13-34-48.gh-issue-142787.wNitJX.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix assertion failure in :mod:`sqlite3` blob subscript when slicing with -indices that result in an empty slice. diff --git a/Misc/NEWS.d/next/Library/2025-12-18-00-14-16.gh-issue-142781.gcOeYF.rst b/Misc/NEWS.d/next/Library/2025-12-18-00-14-16.gh-issue-142781.gcOeYF.rst deleted file mode 100644 index 772e05766c5c69..00000000000000 --- a/Misc/NEWS.d/next/Library/2025-12-18-00-14-16.gh-issue-142781.gcOeYF.rst +++ /dev/null @@ -1,2 +0,0 @@ -:mod:`zoneinfo`: fix a crash when instantiating :class:`~zoneinfo.ZoneInfo` -objects for which the internal class-level cache is inconsistent. diff --git a/Misc/NEWS.d/next/Library/2026-01-01-05-26-00.gh-issue-143304.Kv7x9Q.rst b/Misc/NEWS.d/next/Library/2026-01-01-05-26-00.gh-issue-143304.Kv7x9Q.rst deleted file mode 100644 index 826b2e9a126d36..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-01-01-05-26-00.gh-issue-143304.Kv7x9Q.rst +++ /dev/null @@ -1 +0,0 @@ -Fix :class:`ctypes.CDLL` to honor the ``handle`` parameter on POSIX systems. diff --git a/Misc/NEWS.d/next/Library/2026-01-10-22-58-30.gh-issue-85809.0eW4wt.rst b/Misc/NEWS.d/next/Library/2026-01-10-22-58-30.gh-issue-85809.0eW4wt.rst deleted file mode 100644 index 3993c7a91da138..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-01-10-22-58-30.gh-issue-85809.0eW4wt.rst +++ /dev/null @@ -1 +0,0 @@ -Added :term:`path-like object` support for :func:`shutil.make_archive`. diff --git a/Misc/NEWS.d/next/Library/2026-01-11-13-03-32.gh-issue-142516.u7An-s.rst b/Misc/NEWS.d/next/Library/2026-01-11-13-03-32.gh-issue-142516.u7An-s.rst deleted file mode 100644 index efa7c8a1f62692..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-01-11-13-03-32.gh-issue-142516.u7An-s.rst +++ /dev/null @@ -1,2 +0,0 @@ -:mod:`ssl`: fix reference leaks in :class:`ssl.SSLContext` objects. Patch by -Bénédikt Tran. diff --git a/Misc/NEWS.d/next/Library/2026-01-11-16-59-22.gh-issue-143698.b-Cpeb.rst b/Misc/NEWS.d/next/Library/2026-01-11-16-59-22.gh-issue-143698.b-Cpeb.rst deleted file mode 100644 index 05dc4941c98a83..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-01-11-16-59-22.gh-issue-143698.b-Cpeb.rst +++ /dev/null @@ -1,3 +0,0 @@ -Raise :exc:`TypeError` instead of :exc:`SystemError` when the *scheduler* -in :func:`os.posix_spawn` or :func:`os.posix_spawnp` is not a tuple. -Patch by Bénédikt Tran. diff --git a/Misc/NEWS.d/next/Library/2026-01-11-18-35-52.gh-issue-143698.gXDzsJ.rst b/Misc/NEWS.d/next/Library/2026-01-11-18-35-52.gh-issue-143698.gXDzsJ.rst deleted file mode 100644 index 5f95b0de7d8895..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-01-11-18-35-52.gh-issue-143698.gXDzsJ.rst +++ /dev/null @@ -1,3 +0,0 @@ -Allow *scheduler* and *setpgroup* arguments to be explicitly :const:`None` -when calling :func:`os.posix_spawn` or :func:`os.posix_spawnp`. Patch by -Bénédikt Tran. diff --git a/Misc/NEWS.d/next/Library/2026-01-12-19-39-57.gh-issue-140652.HvM9Bl.rst b/Misc/NEWS.d/next/Library/2026-01-12-19-39-57.gh-issue-140652.HvM9Bl.rst deleted file mode 100644 index bed126f02f8714..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-01-12-19-39-57.gh-issue-140652.HvM9Bl.rst +++ /dev/null @@ -1 +0,0 @@ -Fix a crash in :func:`!_interpchannels.list_all` after closing a channel. diff --git a/Misc/NEWS.d/next/Library/2026-01-17-08-44-25.gh-issue-143637.qyPqDo.rst b/Misc/NEWS.d/next/Library/2026-01-17-08-44-25.gh-issue-143637.qyPqDo.rst deleted file mode 100644 index cbb21194d5b387..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-01-17-08-44-25.gh-issue-143637.qyPqDo.rst +++ /dev/null @@ -1 +0,0 @@ -Fixed a crash in socket.sendmsg() that could occur if ancillary data is mutated re-entrantly during argument parsing. diff --git a/Misc/NEWS.d/next/Library/2026-02-03-19-57-41.gh-issue-144316.wop870.rst b/Misc/NEWS.d/next/Library/2026-02-03-19-57-41.gh-issue-144316.wop870.rst deleted file mode 100644 index b9d0749f56ba6a..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-03-19-57-41.gh-issue-144316.wop870.rst +++ /dev/null @@ -1 +0,0 @@ -Fix crash in ``_remote_debugging`` that caused ``test_external_inspection`` to intermittently fail. Patch by Taegyun Kim. diff --git a/Misc/NEWS.d/next/Library/2026-02-07-16-31-42.gh-issue-144285.iyH9iL.rst b/Misc/NEWS.d/next/Library/2026-02-07-16-31-42.gh-issue-144285.iyH9iL.rst deleted file mode 100644 index e1119a85e9c1f3..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-07-16-31-42.gh-issue-144285.iyH9iL.rst +++ /dev/null @@ -1,3 +0,0 @@ -Attribute suggestions in :exc:`AttributeError` tracebacks are now formatted differently -to make them easier to understand, for example: ``Did you mean '.datetime.now' instead of '.now'``. -Contributed by Bartosz Sławecki. diff --git a/Misc/NEWS.d/next/Library/2026-02-07-16-37-42.gh-issue-144475.8tFEXw.rst b/Misc/NEWS.d/next/Library/2026-02-07-16-37-42.gh-issue-144475.8tFEXw.rst deleted file mode 100644 index b458399bb40640..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-07-16-37-42.gh-issue-144475.8tFEXw.rst +++ /dev/null @@ -1,3 +0,0 @@ -Calling :func:`repr` on :func:`functools.partial` is now safer -when the partial object's internal attributes are replaced while -the string representation is being generated. diff --git a/Misc/NEWS.d/next/Library/2026-02-08-17-09-10.gh-issue-144321.w58PhQ.rst b/Misc/NEWS.d/next/Library/2026-02-08-17-09-10.gh-issue-144321.w58PhQ.rst deleted file mode 100644 index 45561898e2e1e9..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-08-17-09-10.gh-issue-144321.w58PhQ.rst +++ /dev/null @@ -1,3 +0,0 @@ -The functional syntax for creating :class:`typing.NamedTuple` -classes now supports passing any :term:`iterable` of fields and types. -Previously, only sequences were supported. diff --git a/Misc/NEWS.d/next/Library/2026-02-09-02-16-36.gh-issue-144615.s04x4n.rst b/Misc/NEWS.d/next/Library/2026-02-09-02-16-36.gh-issue-144615.s04x4n.rst deleted file mode 100644 index 1db257ae312e84..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-09-02-16-36.gh-issue-144615.s04x4n.rst +++ /dev/null @@ -1,3 +0,0 @@ -Methods directly decorated with :deco:`functools.singledispatchmethod` now -dispatch on the second argument when called after being accessed as class -attributes. Patch by Bartosz Sławecki. diff --git a/Misc/NEWS.d/next/Library/2026-02-10-16-56-05.gh-issue-66305.PZ6GN8.rst b/Misc/NEWS.d/next/Library/2026-02-10-16-56-05.gh-issue-66305.PZ6GN8.rst deleted file mode 100644 index 276711e6ba3900..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-10-16-56-05.gh-issue-66305.PZ6GN8.rst +++ /dev/null @@ -1,3 +0,0 @@ -Fixed a hang on Windows in the :mod:`tempfile` module when -trying to create a temporary file or subdirectory in a non-writable -directory. diff --git a/Misc/NEWS.d/next/Library/2026-02-10-22-05-51.gh-issue-144156.UbrC7F.rst b/Misc/NEWS.d/next/Library/2026-02-10-22-05-51.gh-issue-144156.UbrC7F.rst deleted file mode 100644 index 68e59a6276c092..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-10-22-05-51.gh-issue-144156.UbrC7F.rst +++ /dev/null @@ -1 +0,0 @@ -Fix the folding of headers by the :mod:`email` library when :rfc:`2047` encoded words are used. Now whitespace is correctly preserved and also correctly added between adjacent encoded words. The latter property was broken by the fix for gh-92081, which mostly fixed previous failures to preserve whitespace. diff --git a/Misc/NEWS.d/next/Library/2026-02-12-17-56-17.gh-issue-117865.jE1ema.rst b/Misc/NEWS.d/next/Library/2026-02-12-17-56-17.gh-issue-117865.jE1ema.rst deleted file mode 100644 index f45f6682869eb1..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-12-17-56-17.gh-issue-117865.jE1ema.rst +++ /dev/null @@ -1 +0,0 @@ -Reduce the import time of :mod:`inspect` module by ~20%. diff --git a/Misc/NEWS.d/next/Library/2026-02-13-00-00-00.gh-issue-142224.BidiMissing.rst b/Misc/NEWS.d/next/Library/2026-02-13-00-00-00.gh-issue-142224.BidiMissing.rst deleted file mode 100644 index 29fa908d739fc3..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-13-00-00-00.gh-issue-142224.BidiMissing.rst +++ /dev/null @@ -1,2 +0,0 @@ -:func:`unicodedata.bidirectional` now return the correct default bidi class -for unassigned code points. diff --git a/Misc/NEWS.d/next/Library/2026-02-13-11-14-18.gh-issue-144763.cDwnEE.rst b/Misc/NEWS.d/next/Library/2026-02-13-11-14-18.gh-issue-144763.cDwnEE.rst deleted file mode 100644 index 14eb4f49c8ad3c..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-13-11-14-18.gh-issue-144763.cDwnEE.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix a race condition in :mod:`tracemalloc`: it no longer detaches the attached -thread state to acquire its internal lock. Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Library/2026-02-13-14-20-10.gh-issue-144782.0Y8TKj.rst b/Misc/NEWS.d/next/Library/2026-02-13-14-20-10.gh-issue-144782.0Y8TKj.rst deleted file mode 100644 index 871005fd7d986c..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-13-14-20-10.gh-issue-144782.0Y8TKj.rst +++ /dev/null @@ -1 +0,0 @@ -Fix :class:`argparse.ArgumentParser` to be :mod:`pickleable `. diff --git a/Misc/NEWS.d/next/Library/2026-02-14-14-56-44.gh-issue-140715.AbSheM.rst b/Misc/NEWS.d/next/Library/2026-02-14-14-56-44.gh-issue-140715.AbSheM.rst deleted file mode 100644 index f7782f2fa4f23b..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-14-14-56-44.gh-issue-140715.AbSheM.rst +++ /dev/null @@ -1 +0,0 @@ -Add ``'%D'`` support to :meth:`~datetime.datetime.strptime`. diff --git a/Misc/NEWS.d/next/Library/2026-02-15-00-00-00.gh-issue-144833.TUelo1.rst b/Misc/NEWS.d/next/Library/2026-02-15-00-00-00.gh-issue-144833.TUelo1.rst deleted file mode 100644 index 6d5b18f59ee7ea..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-15-00-00-00.gh-issue-144833.TUelo1.rst +++ /dev/null @@ -1,3 +0,0 @@ -Fixed a use-after-free in :mod:`ssl` when ``SSL_new()`` returns NULL in -``newPySSLSocket()``. The error was reported via a dangling pointer after the -object had already been freed. diff --git a/Misc/NEWS.d/next/Library/2026-02-15-12-02-20.gh-issue-144835.w_oS_J.rst b/Misc/NEWS.d/next/Library/2026-02-15-12-02-20.gh-issue-144835.w_oS_J.rst deleted file mode 100644 index 9d603b51c48a93..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-15-12-02-20.gh-issue-144835.w_oS_J.rst +++ /dev/null @@ -1,2 +0,0 @@ -Added missing explanations for some parameters in :func:`glob.glob` and -:func:`glob.iglob`. diff --git a/Misc/NEWS.d/next/Library/2026-02-17-11-15-17.gh-issue-141510.ZmqEUb.rst b/Misc/NEWS.d/next/Library/2026-02-17-11-15-17.gh-issue-141510.ZmqEUb.rst deleted file mode 100644 index 59a8b4165cdd15..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-17-11-15-17.gh-issue-141510.ZmqEUb.rst +++ /dev/null @@ -1,2 +0,0 @@ -The :mod:`json` module now supports the :class:`frozendict` type. Patch by -Victor Stinner. diff --git a/Misc/NEWS.d/next/Library/2026-02-17-11-28-37.gh-issue-141510.OpAz0M.rst b/Misc/NEWS.d/next/Library/2026-02-17-11-28-37.gh-issue-141510.OpAz0M.rst deleted file mode 100644 index 5b604124c6d7cc..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-17-11-28-37.gh-issue-141510.OpAz0M.rst +++ /dev/null @@ -1,2 +0,0 @@ -The :mod:`copy` module now supports the :class:`frozendict` type. Patch by -Pieter Eendebak based on work by Victor Stinner. diff --git a/Misc/NEWS.d/next/Library/2026-02-18-00-00-00.gh-issue-144809.nYpEUx.rst b/Misc/NEWS.d/next/Library/2026-02-18-00-00-00.gh-issue-144809.nYpEUx.rst deleted file mode 100644 index 62c20b7fa06d94..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-18-00-00-00.gh-issue-144809.nYpEUx.rst +++ /dev/null @@ -1 +0,0 @@ -Make :class:`collections.deque` copy atomic in the :term:`free-threaded build`. diff --git a/Misc/NEWS.d/next/Library/2026-02-18-13-45-00.gh-issue-144777.R97q0a.rst b/Misc/NEWS.d/next/Library/2026-02-18-13-45-00.gh-issue-144777.R97q0a.rst deleted file mode 100644 index fd720bfd3f3da6..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-18-13-45-00.gh-issue-144777.R97q0a.rst +++ /dev/null @@ -1 +0,0 @@ -Fix data races in :class:`io.IncrementalNewlineDecoder` in the :term:`free-threaded build`. diff --git a/Misc/NEWS.d/next/Library/2026-02-19-00-00-00.gh-issue-144986.atexit-leak.rst b/Misc/NEWS.d/next/Library/2026-02-19-00-00-00.gh-issue-144986.atexit-leak.rst deleted file mode 100644 index 841c3758ec4df1..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-19-00-00-00.gh-issue-144986.atexit-leak.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix a memory leak in :func:`atexit.register`. -Patch by Shamil Abdulaev. diff --git a/Misc/NEWS.d/next/Library/2026-02-19-10-57-40.gh-issue-88091.N7qGV-.rst b/Misc/NEWS.d/next/Library/2026-02-19-10-57-40.gh-issue-88091.N7qGV-.rst deleted file mode 100644 index 15cf25052bbb46..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-19-10-57-40.gh-issue-88091.N7qGV-.rst +++ /dev/null @@ -1 +0,0 @@ -Fix :func:`unicodedata.decomposition` for Hangul characters. diff --git a/Misc/NEWS.d/next/Library/2026-02-19-15-42-06.gh-issue-134872.sjYX1-.rst b/Misc/NEWS.d/next/Library/2026-02-19-15-42-06.gh-issue-134872.sjYX1-.rst deleted file mode 100644 index 4654dd060a6b78..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-19-15-42-06.gh-issue-134872.sjYX1-.rst +++ /dev/null @@ -1 +0,0 @@ -Add valid import name suggestions on :exc:`ModuleNotFoundError`. diff --git a/Misc/NEWS.d/next/Library/2026-02-19-16-26-08.gh-issue-141510.4Qxy8_.rst b/Misc/NEWS.d/next/Library/2026-02-19-16-26-08.gh-issue-141510.4Qxy8_.rst deleted file mode 100644 index cf22e82b8415b8..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-19-16-26-08.gh-issue-141510.4Qxy8_.rst +++ /dev/null @@ -1,3 +0,0 @@ -``ParameterizedMIMEHeader.params`` of :mod:`email.headerregistry` is now a -:class:`frozendict` instead of a :class:`types.MappingProxyType`. Patch by -Victor Stinner. diff --git a/Misc/NEWS.d/next/Library/2026-02-19-17-50-47.gh-issue-145006.9gqA0Q.rst b/Misc/NEWS.d/next/Library/2026-02-19-17-50-47.gh-issue-145006.9gqA0Q.rst deleted file mode 100644 index 69052c7ca92c8a..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-19-17-50-47.gh-issue-145006.9gqA0Q.rst +++ /dev/null @@ -1,2 +0,0 @@ -Add :exc:`ModuleNotFoundError` hints when a module for a different ABI -exists. diff --git a/Misc/NEWS.d/next/Library/2026-02-19-18-02-54.gh-issue-141510.qzvYsO.rst b/Misc/NEWS.d/next/Library/2026-02-19-18-02-54.gh-issue-141510.qzvYsO.rst deleted file mode 100644 index ae46ff0cbdd8b1..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-19-18-02-54.gh-issue-141510.qzvYsO.rst +++ /dev/null @@ -1,3 +0,0 @@ -:func:`dataclasses.field`: if *metadata* is ``None``, use an empty -:class:`frozendict`, instead of a :func:`~types.MappingProxyType` of an -empty :class:`dict`. Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Library/2026-02-19-20-54-25.gh-issue-145033.X9EBPQ.rst b/Misc/NEWS.d/next/Library/2026-02-19-20-54-25.gh-issue-145033.X9EBPQ.rst deleted file mode 100644 index 6f496bb30e1686..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-19-20-54-25.gh-issue-145033.X9EBPQ.rst +++ /dev/null @@ -1,2 +0,0 @@ -Add :data:`typing.TypeForm`, implementing :pep:`747`. Patch by Jelle -Zijlstra. diff --git a/Misc/NEWS.d/next/Library/2026-02-20-13-03-10.gh-issue-66802.OYcAi_.rst b/Misc/NEWS.d/next/Library/2026-02-20-13-03-10.gh-issue-66802.OYcAi_.rst deleted file mode 100644 index 68a25262c7d7f7..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-20-13-03-10.gh-issue-66802.OYcAi_.rst +++ /dev/null @@ -1,3 +0,0 @@ -Add :func:`unicodedata.block` function to return the `Unicode block -`_ of a -character. diff --git a/Misc/NEWS.d/next/Library/2026-02-21-17-34-53.gh-issue-123853.6RUwWh.rst b/Misc/NEWS.d/next/Library/2026-02-21-17-34-53.gh-issue-123853.6RUwWh.rst deleted file mode 100644 index 1babcbfd8e678a..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-21-17-34-53.gh-issue-123853.6RUwWh.rst +++ /dev/null @@ -1 +0,0 @@ -Removed Windows 95 compatibility for :func:`locale.getdefaultlocale`. diff --git a/Misc/NEWS.d/next/Library/2026-02-23-20-52-55.gh-issue-145158.vWJtxI.rst b/Misc/NEWS.d/next/Library/2026-02-23-20-52-55.gh-issue-145158.vWJtxI.rst deleted file mode 100644 index 60a5e4ad1f0ca4..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-23-20-52-55.gh-issue-145158.vWJtxI.rst +++ /dev/null @@ -1,2 +0,0 @@ -Avoid undefined behaviour from signed integer overflow when parsing format -strings in the :mod:`struct` module. diff --git a/Misc/NEWS.d/next/Library/2026-02-27-18-04-51.gh-issue-76007.17idfK.rst b/Misc/NEWS.d/next/Library/2026-02-27-18-04-51.gh-issue-76007.17idfK.rst deleted file mode 100644 index 4bb230dcb8473f..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-27-18-04-51.gh-issue-76007.17idfK.rst +++ /dev/null @@ -1,2 +0,0 @@ -The ``version`` attribute of the :mod:`tarfile` module is deprecated and -slated for removal in Python 3.20. diff --git a/Misc/NEWS.d/next/Library/2026-02-27-19-00-26.gh-issue-145301.2Wih4b.rst b/Misc/NEWS.d/next/Library/2026-02-27-19-00-26.gh-issue-145301.2Wih4b.rst deleted file mode 100644 index 7aeb6a1145ab4c..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-27-19-00-26.gh-issue-145301.2Wih4b.rst +++ /dev/null @@ -1,2 +0,0 @@ -:mod:`hashlib`: fix a crash when the initialization of the underlying C -extension module fails. diff --git a/Misc/NEWS.d/next/Library/2026-02-28-00-55-00.gh-issue-145301.Lk2bRl.rst b/Misc/NEWS.d/next/Library/2026-02-28-00-55-00.gh-issue-145301.Lk2bRl.rst deleted file mode 100644 index 436ff316b2c327..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-02-28-00-55-00.gh-issue-145301.Lk2bRl.rst +++ /dev/null @@ -1,2 +0,0 @@ -:mod:`hmac`: fix a crash when the initialization of the underlying C -extension module fails. diff --git a/Misc/NEWS.d/next/Library/2026-03-02-19-41-39.gh-issue-145376.OOzSOh.rst b/Misc/NEWS.d/next/Library/2026-03-02-19-41-39.gh-issue-145376.OOzSOh.rst deleted file mode 100644 index b6dbda0427181d..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-03-02-19-41-39.gh-issue-145376.OOzSOh.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fix double free and null pointer dereference in unusual error scenarios -in :mod:`hashlib` and :mod:`hmac` modules. diff --git a/Misc/NEWS.d/next/Library/2026-03-02-20-08-09.gh-issue-145335.lVTBvd.rst b/Misc/NEWS.d/next/Library/2026-03-02-20-08-09.gh-issue-145335.lVTBvd.rst deleted file mode 100644 index 53033b06c2fae0..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-03-02-20-08-09.gh-issue-145335.lVTBvd.rst +++ /dev/null @@ -1,5 +0,0 @@ -``os.listdir(-1)`` and ``os.scandir(-1)`` now fail with -``OSError(errno.EBADF)`` rather than listing the current directory. -``os.listxattr(-1)`` now fails with ``OSError(errno.EBADF)`` rather than -listing extended attributes of the current directory. Patch by Victor -Stinner. diff --git a/Misc/NEWS.d/next/Library/2026-03-03-11-49-44.gh-issue-145417.m_HxIL.rst b/Misc/NEWS.d/next/Library/2026-03-03-11-49-44.gh-issue-145417.m_HxIL.rst deleted file mode 100644 index 17d62df72ce1ae..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-03-03-11-49-44.gh-issue-145417.m_HxIL.rst +++ /dev/null @@ -1,4 +0,0 @@ -:mod:`venv`: Prevent incorrect preservation of SELinux context -when copying the ``Activate.ps1`` script. The script inherited -the SELinux security context of the system template directory, -rather than the destination project directory. diff --git a/Misc/NEWS.d/next/Library/2026-03-05-16-06-09.gh-issue-141510.dFPAQS.rst b/Misc/NEWS.d/next/Library/2026-03-05-16-06-09.gh-issue-141510.dFPAQS.rst deleted file mode 100644 index 280a7b3632ddae..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-03-05-16-06-09.gh-issue-141510.dFPAQS.rst +++ /dev/null @@ -1,2 +0,0 @@ -:mod:`marshal` now supports :class:`frozendict` objects. The marshal format -version was increased to 6. Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Library/2026-03-05-19-01-28.gh-issue-145551.gItPRl.rst b/Misc/NEWS.d/next/Library/2026-03-05-19-01-28.gh-issue-145551.gItPRl.rst deleted file mode 100644 index 15b70d734ca3b9..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-03-05-19-01-28.gh-issue-145551.gItPRl.rst +++ /dev/null @@ -1 +0,0 @@ -Fix InvalidStateError when cancelling process created by :func:`asyncio.create_subprocess_exec` or :func:`asyncio.create_subprocess_shell`. Patch by Daan De Meyer. diff --git a/Misc/NEWS.d/next/Library/2026-03-07-15-00-00.gh-issue-145623.2Y7LzT.rst b/Misc/NEWS.d/next/Library/2026-03-07-15-00-00.gh-issue-145623.2Y7LzT.rst deleted file mode 100644 index 77b43e79e35860..00000000000000 --- a/Misc/NEWS.d/next/Library/2026-03-07-15-00-00.gh-issue-145623.2Y7LzT.rst +++ /dev/null @@ -1,3 +0,0 @@ -Fix crash in :mod:`struct` when calling :func:`repr` or -``__sizeof__()`` on an uninitialized :class:`struct.Struct` -object created via ``Struct.__new__()`` without calling ``__init__()``. diff --git a/Misc/NEWS.d/next/Security/2026-01-31-21-56-54.gh-issue-144370.fp9m8t.rst b/Misc/NEWS.d/next/Security/2026-01-31-21-56-54.gh-issue-144370.fp9m8t.rst deleted file mode 100644 index 2d13a0611322c5..00000000000000 --- a/Misc/NEWS.d/next/Security/2026-01-31-21-56-54.gh-issue-144370.fp9m8t.rst +++ /dev/null @@ -1,2 +0,0 @@ -Disallow usage of control characters in status in :mod:`wsgiref.handlers` to prevent HTTP header injections. -Patch by Benedikt Johannes. diff --git a/Misc/NEWS.d/next/Security/2026-03-04-18-59-17.gh-issue-145506.6hwvEh.rst b/Misc/NEWS.d/next/Security/2026-03-04-18-59-17.gh-issue-145506.6hwvEh.rst deleted file mode 100644 index dcdb44d4fae4e5..00000000000000 --- a/Misc/NEWS.d/next/Security/2026-03-04-18-59-17.gh-issue-145506.6hwvEh.rst +++ /dev/null @@ -1,2 +0,0 @@ -Fixes :cve:`2026-2297` by ensuring that ``SourcelessFileLoader`` uses -:func:`io.open_code` when opening ``.pyc`` files. diff --git a/Misc/NEWS.d/next/Tests/2026-02-12-12-12-00.gh-issue-144739.-fx1tN.rst b/Misc/NEWS.d/next/Tests/2026-02-12-12-12-00.gh-issue-144739.-fx1tN.rst deleted file mode 100644 index 8c46ff133f9433..00000000000000 --- a/Misc/NEWS.d/next/Tests/2026-02-12-12-12-00.gh-issue-144739.-fx1tN.rst +++ /dev/null @@ -1,3 +0,0 @@ -When Python was compiled with system expat older then 2.7.2 but tests run -with newer expat, still skip -:class:`!test.test_pyexpat.MemoryProtectionTest`. diff --git a/Misc/NEWS.d/next/Tests/2026-03-04-17-39-15.gh-issue-144741.0RHhBF.rst b/Misc/NEWS.d/next/Tests/2026-03-04-17-39-15.gh-issue-144741.0RHhBF.rst deleted file mode 100644 index be3092f1c2592a..00000000000000 --- a/Misc/NEWS.d/next/Tests/2026-03-04-17-39-15.gh-issue-144741.0RHhBF.rst +++ /dev/null @@ -1,3 +0,0 @@ -Fix ``test_frame_pointer_unwind`` when Python is built with -:option:`--enable-shared`. Classify also libpython frames as ``"python"``. -Patch by Victor Stinner. diff --git a/Misc/NEWS.d/next/Windows/2026-02-13-11-07-51.gh-issue-144551.ENtMYD.rst b/Misc/NEWS.d/next/Windows/2026-02-13-11-07-51.gh-issue-144551.ENtMYD.rst deleted file mode 100644 index 810985a352baeb..00000000000000 --- a/Misc/NEWS.d/next/Windows/2026-02-13-11-07-51.gh-issue-144551.ENtMYD.rst +++ /dev/null @@ -1 +0,0 @@ -Updated bundled version of OpenSSL to 3.5.5. diff --git a/Misc/NEWS.d/next/Windows/2026-02-27-10-57-20.gh-issue-145307.ueoT7j.rst b/Misc/NEWS.d/next/Windows/2026-02-27-10-57-20.gh-issue-145307.ueoT7j.rst deleted file mode 100644 index 6f039197962e10..00000000000000 --- a/Misc/NEWS.d/next/Windows/2026-02-27-10-57-20.gh-issue-145307.ueoT7j.rst +++ /dev/null @@ -1,2 +0,0 @@ -Defers loading of the ``psapi.dll`` module until it is used by -:func:`ctypes.util.dllist`. diff --git a/Misc/NEWS.d/next/Windows/2026-03-10-09-46-44.gh-issue-145731.5uEGgb.rst b/Misc/NEWS.d/next/Windows/2026-03-10-09-46-44.gh-issue-145731.5uEGgb.rst deleted file mode 100644 index 676a68e5a912f5..00000000000000 --- a/Misc/NEWS.d/next/Windows/2026-03-10-09-46-44.gh-issue-145731.5uEGgb.rst +++ /dev/null @@ -1 +0,0 @@ -Fix negative timestamp during DST on Windows. Patch by Hugo van Kemenade. diff --git a/README.rst b/README.rst index 68e114e66abe43..1d2874e9ca4fdc 100644 --- a/README.rst +++ b/README.rst @@ -1,4 +1,4 @@ -This is Python version 3.15.0 alpha 6 +This is Python version 3.15.0 alpha 7 ===================================== .. image:: https://github.com/python/cpython/actions/workflows/build.yml/badge.svg?branch=main&event=push From 2d35f9bc1cf61b27639ed992dfbf363ab436fd8b Mon Sep 17 00:00:00 2001 From: Matt Van Horn Date: Tue, 10 Mar 2026 06:20:42 -0700 Subject: [PATCH 04/19] gh-145492: Fix defaultdict __repr__ infinite recursion (GH-145659) Co-Authored-By: Thomas Kowalski --- Lib/test/test_defaultdict.py | 15 +++++++++++++++ ...2026-03-09-00-00-00.gh-issue-145492.457Afc.rst | 3 +++ Modules/_collectionsmodule.c | 5 +++-- 3 files changed, 21 insertions(+), 2 deletions(-) create mode 100644 Misc/NEWS.d/next/Library/2026-03-09-00-00-00.gh-issue-145492.457Afc.rst diff --git a/Lib/test/test_defaultdict.py b/Lib/test/test_defaultdict.py index fbd7354a915a0a..732e9a876ca8ad 100644 --- a/Lib/test/test_defaultdict.py +++ b/Lib/test/test_defaultdict.py @@ -204,5 +204,20 @@ def default_factory(): self.assertEqual(test_dict[key], 2) self.assertEqual(count, 2) + def test_repr_recursive_factory(self): + # gh-145492: defaultdict.__repr__ should not cause infinite recursion + # when the factory's __repr__ calls repr() on the defaultdict. + class ProblematicFactory: + def __call__(self): + return {} + def __repr__(self): + repr(dd) + return "ProblematicFactory()" + + dd = defaultdict(ProblematicFactory()) + # Should not raise RecursionError + r = repr(dd) + self.assertIn('ProblematicFactory()', r) + if __name__ == "__main__": unittest.main() diff --git a/Misc/NEWS.d/next/Library/2026-03-09-00-00-00.gh-issue-145492.457Afc.rst b/Misc/NEWS.d/next/Library/2026-03-09-00-00-00.gh-issue-145492.457Afc.rst new file mode 100644 index 00000000000000..297ee4099f12c5 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2026-03-09-00-00-00.gh-issue-145492.457Afc.rst @@ -0,0 +1,3 @@ +Fix infinite recursion in :class:`collections.defaultdict` ``__repr__`` +when a ``defaultdict`` contains itself. Based on analysis by KowalskiThomas +in :gh:`145492`. diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c index c3d63c8aab4b47..15c9aa41911822 100644 --- a/Modules/_collectionsmodule.c +++ b/Modules/_collectionsmodule.c @@ -2385,9 +2385,10 @@ defdict_repr(PyObject *op) } defrepr = PyUnicode_FromString("..."); } - else + else { defrepr = PyObject_Repr(dd->default_factory); - Py_ReprLeave(dd->default_factory); + Py_ReprLeave(dd->default_factory); + } } if (defrepr == NULL) { Py_DECREF(baserepr); From ae0d2875bcfa111383e39d9ba0d24c1c317ee597 Mon Sep 17 00:00:00 2001 From: Steve Dower Date: Tue, 10 Mar 2026 13:58:32 +0000 Subject: [PATCH 05/19] gh-145035: Allows removing the _pyrepl module to completely disable the modern REPL (GH-145159) --- Lib/_sitebuiltins.py | 12 ++++- Lib/asyncio/__main__.py | 14 ++++-- Lib/pdb.py | 8 ++- Lib/pydoc.py | 49 +++++++++++++------ Lib/site.py | 2 + Lib/test/support/__init__.py | 7 +++ Lib/test/test_pyclbr.py | 3 +- Lib/test/test_pyrepl/__init__.py | 3 ++ Lib/test/test_repl.py | 7 +++ ...-02-23-21-28-12.gh-issue-145035.J5UjS6.rst | 3 ++ Modules/main.c | 48 +++++++++++++----- 11 files changed, 121 insertions(+), 35 deletions(-) create mode 100644 Misc/NEWS.d/next/Library/2026-02-23-21-28-12.gh-issue-145035.J5UjS6.rst diff --git a/Lib/_sitebuiltins.py b/Lib/_sitebuiltins.py index 81b36efc6c285f..84551e3546eb6e 100644 --- a/Lib/_sitebuiltins.py +++ b/Lib/_sitebuiltins.py @@ -65,7 +65,17 @@ def __repr__(self): return "Type %s() to see the full %s text" % ((self.__name,)*2) def __call__(self): - from _pyrepl.pager import get_pager + try: + from _pyrepl.pager import get_pager + except ModuleNotFoundError: + try: + from pydoc import get_pager + except ModuleNotFoundError: + def get_pager(): + def _print(text, title=None): + print(text) + return _print + self.__setup() pager = get_pager() diff --git a/Lib/asyncio/__main__.py b/Lib/asyncio/__main__.py index 44667efc522556..0bf3bdded40200 100644 --- a/Lib/asyncio/__main__.py +++ b/Lib/asyncio/__main__.py @@ -12,13 +12,16 @@ import types import warnings -from _colorize import get_theme -from _pyrepl.console import InteractiveColoredConsole +try: + from _colorize import get_theme + from _pyrepl.console import InteractiveColoredConsole as InteractiveConsole +except ModuleNotFoundError: + from code import InteractiveConsole from . import futures -class AsyncIOInteractiveConsole(InteractiveColoredConsole): +class AsyncIOInteractiveConsole(InteractiveConsole): def __init__(self, locals, loop): super().__init__(locals, filename="") @@ -185,7 +188,10 @@ def interrupt(self) -> None: if os.getenv('PYTHON_BASIC_REPL'): CAN_USE_PYREPL = False else: - from _pyrepl.main import CAN_USE_PYREPL + try: + from _pyrepl.main import CAN_USE_PYREPL + except ModuleNotFoundError: + CAN_USE_PYREPL = False return_code = 0 loop = asyncio.new_event_loop() diff --git a/Lib/pdb.py b/Lib/pdb.py index b5d8f827827415..7b08d2bb70183d 100644 --- a/Lib/pdb.py +++ b/Lib/pdb.py @@ -97,12 +97,16 @@ import selectors import threading import _colorize -import _pyrepl.utils from contextlib import ExitStack, closing, contextmanager from types import CodeType from warnings import deprecated +try: + import _pyrepl.utils +except ModuleNotFoundError: + _pyrepl = None + class Restart(Exception): """Causes a debugger to be restarted for the debugged python program.""" @@ -1097,7 +1101,7 @@ def handle_command_def(self, line): return False def _colorize_code(self, code): - if self.colorize: + if self.colorize and _pyrepl: colors = list(_pyrepl.utils.gen_colors(code)) chars, _ = _pyrepl.utils.disp_str(code, colors=colors, force_color=True) code = "".join(chars) diff --git a/Lib/pydoc.py b/Lib/pydoc.py index 69c83e085113c9..a1a6aad434ddf4 100644 --- a/Lib/pydoc.py +++ b/Lib/pydoc.py @@ -78,20 +78,41 @@ class or function within a module or module in a package. If the from reprlib import Repr from traceback import format_exception_only -from _pyrepl.pager import (get_pager, pipe_pager, - plain_pager, tempfile_pager, tty_pager) - -# Expose plain() as pydoc.plain() -from _pyrepl.pager import plain # noqa: F401 - - -# --------------------------------------------------------- old names - -getpager = get_pager -pipepager = pipe_pager -plainpager = plain_pager -tempfilepager = tempfile_pager -ttypager = tty_pager +try: + from _pyrepl.pager import (get_pager, pipe_pager, + plain_pager, tempfile_pager, tty_pager) + + # Expose plain() as pydoc.plain() + from _pyrepl.pager import plain # noqa: F401 + + # --------------------------------------------------------- old names + getpager = get_pager + pipepager = pipe_pager + plainpager = plain_pager + tempfilepager = tempfile_pager + ttypager = tty_pager + +except ModuleNotFoundError: + # Minimal alternatives for cases where _pyrepl is absent. + + def plain(text: str) -> str: + """Remove boldface formatting from text.""" + return re.sub('.\b', '', text) + + def plain_pager(text: str, title: str = '') -> None: + """Simply print unformatted text. This is the ultimate fallback.""" + encoding = getattr(sys.stdout, 'encoding', None) or 'utf-8' + text = text.encode(encoding, 'backslashreplace').decode(encoding) + text = plain(text) + sys.stdout.write(text) + + def get_pager(): + """Unconditionally return the plain pager, since _pyrepl is absent.""" + return plain_pager + + # --------------------------------------------------------- old names + getpager = get_pager + plainpager = plain_pager # --------------------------------------------------------- common routines diff --git a/Lib/site.py b/Lib/site.py index 5f09a7dd8c91c0..30015b3f26b4b3 100644 --- a/Lib/site.py +++ b/Lib/site.py @@ -529,6 +529,8 @@ def register_readline(): import _pyrepl.unix_console console_errors = _pyrepl.unix_console._error from _pyrepl.main import CAN_USE_PYREPL + except ModuleNotFoundError: + CAN_USE_PYREPL = False finally: sys.path = original_path except ImportError: diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py index d4d3c7f1aefa66..3da662b0c4d50a 100644 --- a/Lib/test/support/__init__.py +++ b/Lib/test/support/__init__.py @@ -3023,6 +3023,13 @@ def force_color(color: bool): import _colorize from .os_helper import EnvironmentVarGuard + if color: + try: + import _pyrepl # noqa: F401 + except ModuleNotFoundError: + # Can't force enable color without _pyrepl, so just skip. + raise unittest.SkipTest("_pyrepl is missing") + with ( swap_attr(_colorize, "can_colorize", lambda *, file=None: color), EnvironmentVarGuard() as env, diff --git a/Lib/test/test_pyclbr.py b/Lib/test/test_pyclbr.py index 79ef178f3807f4..b5ec41b17f793b 100644 --- a/Lib/test/test_pyclbr.py +++ b/Lib/test/test_pyclbr.py @@ -252,7 +252,8 @@ def test_others(self): ignore=('Union', '_ModuleTarget', '_ScriptTarget', '_ZipTarget', 'curframe_locals', '_InteractState', 'rlcompleter'), ) - cm('pydoc', ignore=('input', 'output',)) # properties + cm('pydoc', ignore=('input', 'output', # properties + 'getpager', 'plainpager', )) # aliases # Tests for modules inside packages cm('email.parser') diff --git a/Lib/test/test_pyrepl/__init__.py b/Lib/test/test_pyrepl/__init__.py index 2f37bff6df8b4a..1534d63352cc55 100644 --- a/Lib/test/test_pyrepl/__init__.py +++ b/Lib/test/test_pyrepl/__init__.py @@ -3,6 +3,9 @@ from test.support import import_helper, load_package_tests +import_helper.import_module("_pyrepl") + + if sys.platform != "win32": import_helper.import_module("termios") diff --git a/Lib/test/test_repl.py b/Lib/test/test_repl.py index 40965835bcec00..27cd125078ea69 100644 --- a/Lib/test/test_repl.py +++ b/Lib/test/test_repl.py @@ -426,6 +426,13 @@ def test_toplevel_contextvars_async(self): p = spawn_asyncio_repl() p.stdin.write(user_input) user_input2 = "async def set_var(): var.set('ok')\n" + try: + import _pyrepl # noqa: F401 + except ModuleNotFoundError: + # If we're going to be forced into the regular REPL, then we need an + # extra newline here. Omit it by default to catch any breakage to + # the new REPL's behavior. + user_input2 += "\n" p.stdin.write(user_input2) user_input3 = "await set_var()\n" p.stdin.write(user_input3) diff --git a/Misc/NEWS.d/next/Library/2026-02-23-21-28-12.gh-issue-145035.J5UjS6.rst b/Misc/NEWS.d/next/Library/2026-02-23-21-28-12.gh-issue-145035.J5UjS6.rst new file mode 100644 index 00000000000000..b20da3b54c0415 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2026-02-23-21-28-12.gh-issue-145035.J5UjS6.rst @@ -0,0 +1,3 @@ +Allows omitting the internal library ``_pyrepl`` with limited loss of +functionality. This allows complete removal of the modern REPL, which is an +unsupported configuration, but still desirable for some distributions. diff --git a/Modules/main.c b/Modules/main.c index 95ba541d98c2e8..7731fa0c7c6717 100644 --- a/Modules/main.c +++ b/Modules/main.c @@ -562,13 +562,25 @@ pymain_run_stdin(PyConfig *config) return pymain_exit_err_print(); } - if (!isatty(fileno(stdin)) - || _Py_GetEnv(config->use_environment, "PYTHON_BASIC_REPL")) { - PyCompilerFlags cf = _PyCompilerFlags_INIT; - int run = PyRun_AnyFileExFlags(stdin, "", 0, &cf); - return (run != 0); + int run; + if (isatty(fileno(stdin)) + && !_Py_GetEnv(config->use_environment, "PYTHON_BASIC_REPL")) { + PyObject *pyrepl = PyImport_ImportModule("_pyrepl"); + if (pyrepl != NULL) { + run = pymain_start_pyrepl(0); + Py_DECREF(pyrepl); + return run; + } + if (!PyErr_ExceptionMatches(PyExc_ModuleNotFoundError)) { + fprintf(stderr, "Could not import _pyrepl.main\n"); + return pymain_exit_err_print(); + } + PyErr_Clear(); } - return pymain_start_pyrepl(0); + + PyCompilerFlags cf = _PyCompilerFlags_INIT; + run = PyRun_AnyFileExFlags(stdin, "", 0, &cf); + return (run != 0); } @@ -594,14 +606,24 @@ pymain_repl(PyConfig *config, int *exitcode) return; } - if (!isatty(fileno(stdin)) - || _Py_GetEnv(config->use_environment, "PYTHON_BASIC_REPL")) { - PyCompilerFlags cf = _PyCompilerFlags_INIT; - int run = PyRun_AnyFileExFlags(stdin, "", 0, &cf); - *exitcode = (run != 0); - return; + if (isatty(fileno(stdin)) + && !_Py_GetEnv(config->use_environment, "PYTHON_BASIC_REPL")) { + PyObject *pyrepl = PyImport_ImportModule("_pyrepl"); + if (pyrepl != NULL) { + int run = pymain_start_pyrepl(1); + *exitcode = (run != 0); + Py_DECREF(pyrepl); + return; + } + if (!PyErr_ExceptionMatches(PyExc_ModuleNotFoundError)) { + PyErr_Clear(); + fprintf(stderr, "Could not import _pyrepl.main\n"); + return; + } + PyErr_Clear(); } - int run = pymain_start_pyrepl(1); + PyCompilerFlags cf = _PyCompilerFlags_INIT; + int run = PyRun_AnyFileExFlags(stdin, "", 0, &cf); *exitcode = (run != 0); return; } From 9585f509d796cc3f89e85d4cb9e52e4f10604a01 Mon Sep 17 00:00:00 2001 From: Adorilson Bezerra Date: Tue, 10 Mar 2026 14:19:24 +0000 Subject: [PATCH 06/19] gh-106318: Add examples for str.isspace() docs (#145399) --- Doc/library/stdtypes.rst | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst index c930b876b3ccbf..bfa49b62ec5778 100644 --- a/Doc/library/stdtypes.rst +++ b/Doc/library/stdtypes.rst @@ -2247,17 +2247,34 @@ expression support in the :mod:`re` module). >>> '\t'.isprintable(), '\n'.isprintable() (False, False) + See also :meth:`isspace`. + .. method:: str.isspace() Return ``True`` if there are only whitespace characters in the string and there is at least one character, ``False`` otherwise. + For example: + + .. doctest:: + + >>> ''.isspace() + False + >>> ' '.isspace() + True + >>> '\t\n'.isspace() # TAB and BREAK LINE + True + >>> '\u3000'.isspace() # IDEOGRAPHIC SPACE + True + A character is *whitespace* if in the Unicode character database (see :mod:`unicodedata`), either its general category is ``Zs`` ("Separator, space"), or its bidirectional class is one of ``WS``, ``B``, or ``S``. + See also :meth:`isprintable`. + .. method:: str.istitle() From 1900aa9d36f49cc3fc6c6e6d50ddc8c64b01f978 Mon Sep 17 00:00:00 2001 From: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Date: Tue, 10 Mar 2026 16:40:10 +0200 Subject: [PATCH 07/19] Post 3.15.0a7 --- Include/patchlevel.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Include/patchlevel.h b/Include/patchlevel.h index 3cc12a2b2d3888..7cffd74125f1b4 100644 --- a/Include/patchlevel.h +++ b/Include/patchlevel.h @@ -27,7 +27,7 @@ #define PY_RELEASE_SERIAL 7 /* Version as a string */ -#define PY_VERSION "3.15.0a7" +#define PY_VERSION "3.15.0a7+" /*--end constants--*/ From 7990313afa3234d5145b32ead3ef3f6278735f4f Mon Sep 17 00:00:00 2001 From: Peter Bierma Date: Tue, 10 Mar 2026 10:57:13 -0400 Subject: [PATCH 08/19] Docs: Improve the C API documentation involving threads (GH-145520) Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> --- Doc/c-api/threads.rst | 210 +++++++++++++++++++++++++----------------- 1 file changed, 125 insertions(+), 85 deletions(-) diff --git a/Doc/c-api/threads.rst b/Doc/c-api/threads.rst index 41c7fbda2302cf..3b761d0c657cbd 100644 --- a/Doc/c-api/threads.rst +++ b/Doc/c-api/threads.rst @@ -10,43 +10,63 @@ Thread states and the global interpreter lock single: interpreter lock single: lock, interpreter -Unless on a :term:`free-threaded ` build of :term:`CPython`, -the Python interpreter is not fully thread-safe. In order to support +Unless on a :term:`free-threaded build` of :term:`CPython`, +the Python interpreter is generally not thread-safe. In order to support multi-threaded Python programs, there's a global lock, called the :term:`global -interpreter lock` or :term:`GIL`, that must be held by the current thread before -it can safely access Python objects. Without the lock, even the simplest -operations could cause problems in a multi-threaded program: for example, when +interpreter lock` or :term:`GIL`, that must be held by a thread before +accessing Python objects. Without the lock, even the simplest operations +could cause problems in a multi-threaded program: for example, when two threads simultaneously increment the reference count of the same object, the reference count could end up being incremented only once instead of twice. +As such, only a thread that holds the GIL may operate on Python objects or +invoke Python's C API. + .. index:: single: setswitchinterval (in module sys) -Therefore, the rule exists that only the thread that has acquired the -:term:`GIL` may operate on Python objects or call Python/C API functions. -In order to emulate concurrency of execution, the interpreter regularly -tries to switch threads (see :func:`sys.setswitchinterval`). The lock is also -released around potentially blocking I/O operations like reading or writing -a file, so that other Python threads can run in the meantime. +In order to emulate concurrency, the interpreter regularly tries to switch +threads between bytecode instructions (see :func:`sys.setswitchinterval`). +This is why locks are also necessary for thread-safety in pure-Python code. + +Additionally, the global interpreter lock is released around blocking I/O +operations, such as reading or writing to a file. From the C API, this is done +by :ref:`detaching the thread state `. + .. index:: single: PyThreadState (C type) -The Python interpreter keeps some thread-specific bookkeeping information -inside a data structure called :c:type:`PyThreadState`, known as a :term:`thread state`. -Each OS thread has a thread-local pointer to a :c:type:`PyThreadState`; a thread state +The Python interpreter keeps some thread-local information inside +a data structure called :c:type:`PyThreadState`, known as a :term:`thread state`. +Each thread has a thread-local pointer to a :c:type:`PyThreadState`; a thread state referenced by this pointer is considered to be :term:`attached `. A thread can only have one :term:`attached thread state` at a time. An attached -thread state is typically analogous with holding the :term:`GIL`, except on -:term:`free-threaded ` builds. On builds with the :term:`GIL` enabled, -:term:`attaching ` a thread state will block until the :term:`GIL` -can be acquired. However, even on builds with the :term:`GIL` disabled, it is still required -to have an attached thread state to call most of the C API. +thread state is typically analogous with holding the GIL, except on +free-threaded builds. On builds with the GIL enabled, attaching a thread state +will block until the GIL can be acquired. However, even on builds with the GIL +disabled, it is still required to have an attached thread state, as the interpreter +needs to keep track of which threads may access Python objects. + +.. note:: + + Even on the free-threaded build, attaching a thread state may block, as the + GIL can be re-enabled or threads might be temporarily suspended (such as during + a garbage collection). + +Generally, there will always be an attached thread state when using Python's +C API, including during embedding and when implementing methods, so it's uncommon +to need to set up a thread state on your own. Only in some specific cases, such +as in a :c:macro:`Py_BEGIN_ALLOW_THREADS` block or in a fresh thread, will the +thread not have an attached thread state. +If uncertain, check if :c:func:`PyThreadState_GetUnchecked` returns ``NULL``. -In general, there will always be an :term:`attached thread state` when using Python's C API. -Only in some specific cases (such as in a :c:macro:`Py_BEGIN_ALLOW_THREADS` block) will the -thread not have an attached thread state. If uncertain, check if :c:func:`PyThreadState_GetUnchecked` returns -``NULL``. +If it turns out that you do need to create a thread state, call :c:func:`PyThreadState_New` +followed by :c:func:`PyThreadState_Swap`, or use the dangerous +:c:func:`PyGILState_Ensure` function. + + +.. _detaching-thread-state: Detaching the thread state from extension code ---------------------------------------------- @@ -86,28 +106,37 @@ The block above expands to the following code:: Here is how these functions work: -The :term:`attached thread state` holds the :term:`GIL` for the entire interpreter. When detaching -the :term:`attached thread state`, the :term:`GIL` is released, allowing other threads to attach -a thread state to their own thread, thus getting the :term:`GIL` and can start executing. -The pointer to the prior :term:`attached thread state` is stored as a local variable. -Upon reaching :c:macro:`Py_END_ALLOW_THREADS`, the thread state that was -previously :term:`attached ` is passed to :c:func:`PyEval_RestoreThread`. -This function will block until another releases its :term:`thread state `, -thus allowing the old :term:`thread state ` to get re-attached and the -C API can be called again. - -For :term:`free-threaded ` builds, the :term:`GIL` is normally -out of the question, but detaching the :term:`thread state ` is still required -for blocking I/O and long operations. The difference is that threads don't have to wait for the :term:`GIL` -to be released to attach their thread state, allowing true multi-core parallelism. +The attached thread state implies that the GIL is held for the interpreter. +To detach it, :c:func:`PyEval_SaveThread` is called and the result is stored +in a local variable. + +By detaching the thread state, the GIL is released, which allows other threads +to attach to the interpreter and execute while the current thread performs +blocking I/O. When the I/O operation is complete, the old thread state is +reattached by calling :c:func:`PyEval_RestoreThread`, which will wait until +the GIL can be acquired. .. note:: - Calling system I/O functions is the most common use case for detaching - the :term:`thread state `, but it can also be useful before calling - long-running computations which don't need access to Python objects, such - as compression or cryptographic functions operating over memory buffers. + Performing blocking I/O is the most common use case for detaching + the thread state, but it is also useful to call it over long-running + native code that doesn't need access to Python objects or Python's C API. For example, the standard :mod:`zlib` and :mod:`hashlib` modules detach the - :term:`thread state ` when compressing or hashing data. + :term:`thread state ` when compressing or hashing + data. + +On a :term:`free-threaded build`, the :term:`GIL` is usually out of the question, +but **detaching the thread state is still required**, because the interpreter +periodically needs to block all threads to get a consistent view of Python objects +without the risk of race conditions. +For example, CPython currently suspends all threads for a short period of time +while running the garbage collector. + +.. warning:: + + Detaching the thread state can lead to unexpected behavior during interpreter + finalization. See :ref:`cautions-regarding-runtime-finalization` for more + details. + APIs ^^^^ @@ -149,73 +178,84 @@ example usage in the Python source distribution. declaration. -.. _gilstate: - Non-Python created threads -------------------------- When threads are created using the dedicated Python APIs (such as the -:mod:`threading` module), a thread state is automatically associated to them -and the code shown above is therefore correct. However, when threads are -created from C (for example by a third-party library with its own thread -management), they don't hold the :term:`GIL`, because they don't have an -:term:`attached thread state`. +:mod:`threading` module), a thread state is automatically associated with them, +However, when a thread is created from native code (for example, by a +third-party library with its own thread management), it doesn't hold an +attached thread state. If you need to call Python code from these threads (often this will be part of a callback API provided by the aforementioned third-party library), you must first register these threads with the interpreter by -creating an :term:`attached thread state` before you can start using the Python/C -API. When you are done, you should detach the :term:`thread state `, and -finally free it. +creating a new thread state and attaching it. -The :c:func:`PyGILState_Ensure` and :c:func:`PyGILState_Release` functions do -all of the above automatically. The typical idiom for calling into Python -from a C thread is:: +The most robust way to do this is through :c:func:`PyThreadState_New` followed +by :c:func:`PyThreadState_Swap`. - PyGILState_STATE gstate; - gstate = PyGILState_Ensure(); +.. note:: + ``PyThreadState_New`` requires an argument pointing to the desired + interpreter; such a pointer can be acquired via a call to + :c:func:`PyInterpreterState_Get` from the code where the thread was + created. + +For example:: + + /* The return value of PyInterpreterState_Get() from the + function that created this thread. */ + PyInterpreterState *interp = thread_data->interp; + + /* Create a new thread state for the interpreter. It does not start out + attached. */ + PyThreadState *tstate = PyThreadState_New(interp); + + /* Attach the thread state, which will acquire the GIL. */ + PyThreadState_Swap(tstate); /* Perform Python actions here. */ result = CallSomeFunction(); /* evaluate result or handle exception */ - /* Release the thread. No Python API allowed beyond this point. */ - PyGILState_Release(gstate); + /* Destroy the thread state. No Python API allowed beyond this point. */ + PyThreadState_Clear(tstate); + PyThreadState_DeleteCurrent(); -Note that the ``PyGILState_*`` functions assume there is only one global -interpreter (created automatically by :c:func:`Py_Initialize`). Python -supports the creation of additional interpreters (using -:c:func:`Py_NewInterpreter`), but mixing multiple interpreters and the -``PyGILState_*`` API is unsupported. This is because :c:func:`PyGILState_Ensure` -and similar functions default to :term:`attaching ` a -:term:`thread state` for the main interpreter, meaning that the thread can't safely -interact with the calling subinterpreter. +.. warning:: -Supporting subinterpreters in non-Python threads ------------------------------------------------- + If the interpreter finalized before ``PyThreadState_Swap`` was called, then + ``interp`` will be a dangling pointer! -If you would like to support subinterpreters with non-Python created threads, you -must use the ``PyThreadState_*`` API instead of the traditional ``PyGILState_*`` -API. +.. _gilstate: -In particular, you must store the interpreter state from the calling -function and pass it to :c:func:`PyThreadState_New`, which will ensure that -the :term:`thread state` is targeting the correct interpreter:: +Legacy API +---------- - /* The return value of PyInterpreterState_Get() from the - function that created this thread. */ - PyInterpreterState *interp = ThreadData->interp; - PyThreadState *tstate = PyThreadState_New(interp); - PyThreadState_Swap(tstate); +Another common pattern to call Python code from a non-Python thread is to use +:c:func:`PyGILState_Ensure` followed by a call to :c:func:`PyGILState_Release`. - /* GIL of the subinterpreter is now held. - Perform Python actions here. */ +These functions do not work well when multiple interpreters exist in the Python +process. If no Python interpreter has ever been used in the current thread (which +is common for threads created outside Python), ``PyGILState_Ensure`` will create +and attach a thread state for the "main" interpreter (the first interpreter in +the Python process). + +Additionally, these functions have thread-safety issues during interpreter +finalization. Using ``PyGILState_Ensure`` during finalization will likely +crash the process. + +Usage of these functions look like such:: + + PyGILState_STATE gstate; + gstate = PyGILState_Ensure(); + + /* Perform Python actions here. */ result = CallSomeFunction(); /* evaluate result or handle exception */ - /* Destroy the thread state. No Python API allowed beyond this point. */ - PyThreadState_Clear(tstate); - PyThreadState_DeleteCurrent(); + /* Release the thread. No Python API allowed beyond this point. */ + PyGILState_Release(gstate); .. _fork-and-threads: From 467507a651e351712f18fcafad64d1b5eed89b7d Mon Sep 17 00:00:00 2001 From: Charlie Lin Date: Tue, 10 Mar 2026 11:21:33 -0400 Subject: [PATCH 09/19] gh-145697: Add `.sql` and `.sqlite3` recognition in `mimetypes` (GH-145698) Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Benedikt Johannes --- Doc/whatsnew/3.15.rst | 2 ++ Lib/mimetypes.py | 3 +++ Lib/test/test_mimetypes.py | 2 ++ .../Library/2026-03-09-18-33-16.gh-issue-145697.d6hFmm.rst | 1 + 4 files changed, 8 insertions(+) create mode 100644 Misc/NEWS.d/next/Library/2026-03-09-18-33-16.gh-issue-145697.d6hFmm.rst diff --git a/Doc/whatsnew/3.15.rst b/Doc/whatsnew/3.15.rst index ead4e7cbf2871e..e749ef2a455ea2 100644 --- a/Doc/whatsnew/3.15.rst +++ b/Doc/whatsnew/3.15.rst @@ -825,6 +825,8 @@ mimetypes * Add ``application/node`` MIME type for ``.cjs`` extension. (Contributed by John Franey in :gh:`140937`.) * Add ``application/toml``. (Contributed by Gil Forcada in :gh:`139959`.) +* Add ``application/sql`` and ``application/vnd.sqlite3``. + (Contributed by Charlie Lin in :gh:`145698`.) * Add ``image/jxl``. (Contributed by Foolbar in :gh:`144213`.) * Rename ``application/x-texinfo`` to ``application/texinfo``. (Contributed by Charlie Lin in :gh:`140165`.) diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py index fc916c470a0110..ee66160be63b6f 100644 --- a/Lib/mimetypes.py +++ b/Lib/mimetypes.py @@ -501,6 +501,7 @@ def _default_mime_types(): '.ps' : 'application/postscript', '.eps' : 'application/postscript', '.rtf' : 'application/rtf', + '.sql' : 'application/sql', '.texi' : 'application/texinfo', '.texinfo': 'application/texinfo', '.toml' : 'application/toml', @@ -525,6 +526,8 @@ def _default_mime_types(): '.xlsx' : 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', '.docx' : 'application/vnd.openxmlformats-officedocument.wordprocessingml.document', '.rar' : 'application/vnd.rar', + '.sqlite3': 'application/vnd.sqlite3', + '.sqlite' : 'application/vnd.sqlite3', '.wasm' : 'application/wasm', '.7z' : 'application/x-7z-compressed', '.bcpio' : 'application/x-bcpio', diff --git a/Lib/test/test_mimetypes.py b/Lib/test/test_mimetypes.py index fe7584f1f9d3b3..2d618081521e10 100644 --- a/Lib/test/test_mimetypes.py +++ b/Lib/test/test_mimetypes.py @@ -232,6 +232,7 @@ def check_extensions(): ("application/pdf", ".pdf"), ("application/postscript", ".ps"), ("application/rtf", ".rtf"), + ("application/sql", ".sql"), ("application/texinfo", ".texi"), ("application/toml", ".toml"), ("application/vnd.apple.mpegurl", ".m3u"), @@ -246,6 +247,7 @@ def check_extensions(): ("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", ".xlsx"), ("application/vnd.openxmlformats-officedocument.wordprocessingml.document", ".docx"), ("application/vnd.rar", ".rar"), + ("application/vnd.sqlite3", ".sqlite3"), ("application/x-7z-compressed", ".7z"), ("application/x-debian-package", ".deb"), ("application/x-httpd-php", ".php"), diff --git a/Misc/NEWS.d/next/Library/2026-03-09-18-33-16.gh-issue-145697.d6hFmm.rst b/Misc/NEWS.d/next/Library/2026-03-09-18-33-16.gh-issue-145697.d6hFmm.rst new file mode 100644 index 00000000000000..c3a476df75f136 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2026-03-09-18-33-16.gh-issue-145697.d6hFmm.rst @@ -0,0 +1 @@ +Add ``application/sql`` and ``application/vnd.sqlite3`` into ``mimetypes``. From 2114da976c3d85a85283d1a9437bdf8604626be8 Mon Sep 17 00:00:00 2001 From: Ali Towaiji <145403626+Towaiji@users.noreply.github.com> Date: Tue, 10 Mar 2026 11:48:41 -0400 Subject: [PATCH 10/19] gh-145591: Move slicing note to __getitem__ (GH-145606) --- Doc/reference/datamodel.rst | 31 ++++++++++++++++--------------- 1 file changed, 16 insertions(+), 15 deletions(-) diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst index cf5a0e71a104eb..062d301f6286f7 100644 --- a/Doc/reference/datamodel.rst +++ b/Doc/reference/datamodel.rst @@ -3223,21 +3223,6 @@ through the object's keys; for sequences, it should iterate through the values. .. versionadded:: 3.4 -.. index:: pair: object; slice - -.. note:: - - Slicing is done exclusively with the following three methods. A call like :: - - a[1:2] = b - - is translated to :: - - a[slice(1, 2, None)] = b - - and so forth. Missing slice items are always filled in with ``None``. - - .. method:: object.__getitem__(self, subscript) Called to implement *subscription*, that is, ``self[subscript]``. @@ -3260,6 +3245,22 @@ through the object's keys; for sequences, it should iterate through the values. should raise an :exc:`LookupError` or one of its subclasses (:exc:`IndexError` for sequences; :exc:`KeyError` for mappings). + .. index:: pair: object; slice + + .. note:: + + Slicing is handled by :meth:`!__getitem__`, :meth:`~object.__setitem__`, + and :meth:`~object.__delitem__`. + A call like :: + + a[1:2] = b + + is translated to :: + + a[slice(1, 2, None)] = b + + and so forth. Missing slice items are always filled in with ``None``. + .. note:: The sequence iteration protocol (used, for example, in :keyword:`for` From 2756d56eefe86c4df696d8c65e21e4583ffe7511 Mon Sep 17 00:00:00 2001 From: Alexander Shadchin Date: Tue, 10 Mar 2026 19:02:57 +0300 Subject: [PATCH 11/19] gh-85277: Fix building without `stropts.h` or empty `stropts.h` (#143521) --- ...6-01-08-22-27-07.gh-issue-85277.TotySi.rst | 1 + Modules/posixmodule.c | 4 +- configure | 296 +++++++++--------- configure.ac | 12 +- 4 files changed, 167 insertions(+), 146 deletions(-) create mode 100644 Misc/NEWS.d/next/Build/2026-01-08-22-27-07.gh-issue-85277.TotySi.rst diff --git a/Misc/NEWS.d/next/Build/2026-01-08-22-27-07.gh-issue-85277.TotySi.rst b/Misc/NEWS.d/next/Build/2026-01-08-22-27-07.gh-issue-85277.TotySi.rst new file mode 100644 index 00000000000000..538995538d7da8 --- /dev/null +++ b/Misc/NEWS.d/next/Build/2026-01-08-22-27-07.gh-issue-85277.TotySi.rst @@ -0,0 +1 @@ +Fix building without ``stropts.h`` or empty ``stropts.h`` diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c index aa3d682a19bc9c..8c360ce3b79b8a 100644 --- a/Modules/posixmodule.c +++ b/Modules/posixmodule.c @@ -9397,13 +9397,13 @@ os_openpty_impl(PyObject *module) if (_Py_set_inheritable(master_fd, 0, NULL) < 0) goto posix_error; -#if !defined(__CYGWIN__) && !defined(__ANDROID__) && !defined(HAVE_DEV_PTC) +#if defined(HAVE_STROPTS_H) && !defined(HAVE_DEV_PTC) ioctl(slave_fd, I_PUSH, "ptem"); /* push ptem */ ioctl(slave_fd, I_PUSH, "ldterm"); /* push ldterm */ #ifndef __hpux ioctl(slave_fd, I_PUSH, "ttcompat"); /* push ttcompat */ #endif /* __hpux */ -#endif /* HAVE_CYGWIN */ +#endif /* defined(HAVE_STROPTS_H) && !defined(HAVE_DEV_PTC) */ #endif /* HAVE_OPENPTY */ return Py_BuildValue("(ii)", master_fd, slave_fd); diff --git a/configure b/configure index eca5f03cdcfb2d..95bb6ba4e84ccf 100755 --- a/configure +++ b/configure @@ -2340,6 +2340,60 @@ fi } # ac_fn_c_try_run +# ac_fn_check_decl LINENO SYMBOL VAR INCLUDES EXTRA-OPTIONS FLAG-VAR +# ------------------------------------------------------------------ +# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR +# accordingly. Pass EXTRA-OPTIONS to the compiler, using FLAG-VAR. +ac_fn_check_decl () +{ + as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack + as_decl_name=`echo $2|sed 's/ *(.*//'` + { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5 +printf %s "checking whether $as_decl_name is declared... " >&6; } +if eval test \${$3+y} +then : + printf %s "(cached) " >&6 +else case e in #( + e) as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'` + eval ac_save_FLAGS=\$$6 + as_fn_append $6 " $5" + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +$4 +int +main (void) +{ +#ifndef $as_decl_name +#ifdef __cplusplus + (void) $as_decl_use; +#else + (void) $as_decl_name; +#endif +#endif + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO" +then : + eval "$3=yes" +else case e in #( + e) eval "$3=no" ;; +esac +fi +rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext + eval $6=\$ac_save_FLAGS + ;; +esac +fi +eval ac_res=\$$3 + { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5 +printf "%s\n" "$ac_res" >&6; } + eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno + +} # ac_fn_check_decl + # ac_fn_c_check_type LINENO TYPE VAR INCLUDES # ------------------------------------------- # Tests whether TYPE exists after having included INCLUDES, setting cache @@ -2658,60 +2712,6 @@ printf "%s\n" "$ac_res" >&6; } } # ac_fn_c_check_func -# ac_fn_check_decl LINENO SYMBOL VAR INCLUDES EXTRA-OPTIONS FLAG-VAR -# ------------------------------------------------------------------ -# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR -# accordingly. Pass EXTRA-OPTIONS to the compiler, using FLAG-VAR. -ac_fn_check_decl () -{ - as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack - as_decl_name=`echo $2|sed 's/ *(.*//'` - { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5 -printf %s "checking whether $as_decl_name is declared... " >&6; } -if eval test \${$3+y} -then : - printf %s "(cached) " >&6 -else case e in #( - e) as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'` - eval ac_save_FLAGS=\$$6 - as_fn_append $6 " $5" - cat confdefs.h - <<_ACEOF >conftest.$ac_ext -/* end confdefs.h. */ -$4 -int -main (void) -{ -#ifndef $as_decl_name -#ifdef __cplusplus - (void) $as_decl_use; -#else - (void) $as_decl_name; -#endif -#endif - - ; - return 0; -} -_ACEOF -if ac_fn_c_try_compile "$LINENO" -then : - eval "$3=yes" -else case e in #( - e) eval "$3=no" ;; -esac -fi -rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext - eval $6=\$ac_save_FLAGS - ;; -esac -fi -eval ac_res=\$$3 - { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5 -printf "%s\n" "$ac_res" >&6; } - eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno - -} # ac_fn_check_decl - # ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES # ---------------------------------------------------- # Tries to find if the field MEMBER exists in type AGGR, after including @@ -11461,12 +11461,6 @@ if test "x$ac_cv_header_spawn_h" = xyes then : printf "%s\n" "#define HAVE_SPAWN_H 1" >>confdefs.h -fi -ac_fn_c_check_header_compile "$LINENO" "stropts.h" "ac_cv_header_stropts_h" "$ac_includes_default" -if test "x$ac_cv_header_stropts_h" = xyes -then : - printf "%s\n" "#define HAVE_STROPTS_H 1" >>confdefs.h - fi ac_fn_c_check_header_compile "$LINENO" "sys/audioio.h" "ac_cv_header_sys_audioio_h" "$ac_includes_default" if test "x$ac_cv_header_sys_audioio_h" = xyes @@ -11951,6 +11945,105 @@ fi fi +# On Linux, stropts.h may be empty +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5 +printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; } +if test ${ac_cv_c_undeclared_builtin_options+y} +then : + printf %s "(cached) " >&6 +else case e in #( + e) ac_save_CFLAGS=$CFLAGS + ac_cv_c_undeclared_builtin_options='cannot detect' + for ac_arg in '' -fno-builtin; do + CFLAGS="$ac_save_CFLAGS $ac_arg" + # This test program should *not* compile successfully. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main (void) +{ +(void) strchr; + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO" +then : + +else case e in #( + e) # This test program should compile successfully. + # No library function is consistently available on + # freestanding implementations, so test against a dummy + # declaration. Include always-available headers on the + # off chance that they somehow elicit warnings. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +#include +#include +#include +extern void ac_decl (int, char *); + +int +main (void) +{ +(void) ac_decl (0, (char *) 0); + (void) ac_decl; + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO" +then : + if test x"$ac_arg" = x +then : + ac_cv_c_undeclared_builtin_options='none needed' +else case e in #( + e) ac_cv_c_undeclared_builtin_options=$ac_arg ;; +esac +fi + break +fi +rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;; +esac +fi +rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext + done + CFLAGS=$ac_save_CFLAGS + ;; +esac +fi +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_undeclared_builtin_options" >&5 +printf "%s\n" "$ac_cv_c_undeclared_builtin_options" >&6; } + case $ac_cv_c_undeclared_builtin_options in #( + 'cannot detect') : + { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5 +printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;} +as_fn_error $? "cannot make $CC report undeclared builtins +See 'config.log' for more details" "$LINENO" 5; } ;; #( + 'none needed') : + ac_c_undeclared_builtin_options='' ;; #( + *) : + ac_c_undeclared_builtin_options=$ac_cv_c_undeclared_builtin_options ;; +esac + +ac_fn_check_decl "$LINENO" "I_PUSH" "ac_cv_have_decl_I_PUSH" " + #ifdef HAVE_SYS_TYPES_H + # include + #endif + #include + +" "$ac_c_undeclared_builtin_options" "CFLAGS" +if test "x$ac_cv_have_decl_I_PUSH" = xyes +then : + + +printf "%s\n" "#define HAVE_STROPTS_H 1" >>confdefs.h + +fi + # bluetooth/bluetooth.h has been known to not compile with -std=c99. # http://permalink.gmane.org/gmane.linux.bluez.kernel/22294 SAVE_CFLAGS=$CFLAGS @@ -20608,89 +20701,6 @@ fi fi -{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5 -printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; } -if test ${ac_cv_c_undeclared_builtin_options+y} -then : - printf %s "(cached) " >&6 -else case e in #( - e) ac_save_CFLAGS=$CFLAGS - ac_cv_c_undeclared_builtin_options='cannot detect' - for ac_arg in '' -fno-builtin; do - CFLAGS="$ac_save_CFLAGS $ac_arg" - # This test program should *not* compile successfully. - cat confdefs.h - <<_ACEOF >conftest.$ac_ext -/* end confdefs.h. */ - -int -main (void) -{ -(void) strchr; - ; - return 0; -} -_ACEOF -if ac_fn_c_try_compile "$LINENO" -then : - -else case e in #( - e) # This test program should compile successfully. - # No library function is consistently available on - # freestanding implementations, so test against a dummy - # declaration. Include always-available headers on the - # off chance that they somehow elicit warnings. - cat confdefs.h - <<_ACEOF >conftest.$ac_ext -/* end confdefs.h. */ -#include -#include -#include -#include -extern void ac_decl (int, char *); - -int -main (void) -{ -(void) ac_decl (0, (char *) 0); - (void) ac_decl; - - ; - return 0; -} -_ACEOF -if ac_fn_c_try_compile "$LINENO" -then : - if test x"$ac_arg" = x -then : - ac_cv_c_undeclared_builtin_options='none needed' -else case e in #( - e) ac_cv_c_undeclared_builtin_options=$ac_arg ;; -esac -fi - break -fi -rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;; -esac -fi -rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext - done - CFLAGS=$ac_save_CFLAGS - ;; -esac -fi -{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_undeclared_builtin_options" >&5 -printf "%s\n" "$ac_cv_c_undeclared_builtin_options" >&6; } - case $ac_cv_c_undeclared_builtin_options in #( - 'cannot detect') : - { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5 -printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;} -as_fn_error $? "cannot make $CC report undeclared builtins -See 'config.log' for more details" "$LINENO" 5; } ;; #( - 'none needed') : - ac_c_undeclared_builtin_options='' ;; #( - *) : - ac_c_undeclared_builtin_options=$ac_cv_c_undeclared_builtin_options ;; -esac - ac_fn_check_decl "$LINENO" "dirfd" "ac_cv_have_decl_dirfd" "#include #include " "$ac_c_undeclared_builtin_options" "CFLAGS" diff --git a/configure.ac b/configure.ac index c21024a1e77433..e049f568417335 100644 --- a/configure.ac +++ b/configure.ac @@ -3011,7 +3011,7 @@ AC_CHECK_HEADERS([ \ io.h langinfo.h libintl.h libutil.h linux/auxvec.h sys/auxv.h linux/fs.h linux/limits.h linux/memfd.h \ linux/netfilter_ipv4.h linux/random.h linux/soundcard.h linux/sched.h \ linux/tipc.h linux/wait.h netdb.h net/ethernet.h netinet/in.h netpacket/packet.h poll.h process.h pthread.h pty.h \ - sched.h setjmp.h shadow.h signal.h spawn.h stropts.h sys/audioio.h sys/bsdtty.h sys/devpoll.h \ + sched.h setjmp.h shadow.h signal.h spawn.h sys/audioio.h sys/bsdtty.h sys/devpoll.h \ sys/endian.h sys/epoll.h sys/event.h sys/eventfd.h sys/file.h sys/ioctl.h sys/kern_control.h \ sys/loadavg.h sys/lock.h sys/memfd.h sys/mkdev.h sys/mman.h sys/modem.h sys/param.h sys/pidfd.h sys/poll.h \ sys/random.h sys/resource.h sys/select.h sys/sendfile.h sys/socket.h sys/soundcard.h sys/stat.h \ @@ -3022,6 +3022,16 @@ AC_CHECK_HEADERS([ \ AC_HEADER_DIRENT AC_HEADER_MAJOR +# On Linux, stropts.h may be empty +AC_CHECK_DECL([I_PUSH], [ + AC_DEFINE([HAVE_STROPTS_H], [1], + [Define to 1 if you have the header file.])], [], [ + #ifdef HAVE_SYS_TYPES_H + # include + #endif + #include +]) + # bluetooth/bluetooth.h has been known to not compile with -std=c99. # http://permalink.gmane.org/gmane.linux.bluez.kernel/22294 SAVE_CFLAGS=$CFLAGS From bf4017b16149ba17d723abacfe93aec79b2235fe Mon Sep 17 00:00:00 2001 From: Farhan Saif Date: Tue, 10 Mar 2026 11:23:39 -0500 Subject: [PATCH 12/19] gh-125053: Document that ob_mutex must only be used via critical section API (#144599) Add a warning in the free-threading extensions howto explaining that PyObject.ob_mutex is reserved for the critical section API and must not be locked directly with PyMutex_Lock, as this can cause deadlocks. Extension authors who need their own lock should add a separate PyMutex field to their object struct. Also add an ob_mutex member entry under PyObject in the C API reference (Doc/c-api/structures.rst) with a cross-reference to the howto. Co-authored-by: Victor Stinner --- Doc/c-api/structures.rst | 13 +++++++++++++ Doc/howto/free-threading-extensions.rst | 24 ++++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/Doc/c-api/structures.rst b/Doc/c-api/structures.rst index 70c4de543b7d00..c0d2663adefc6b 100644 --- a/Doc/c-api/structures.rst +++ b/Doc/c-api/structures.rst @@ -48,6 +48,19 @@ under :ref:`reference counting `. Do not use this field directly; use :c:macro:`Py_TYPE` and :c:func:`Py_SET_TYPE` instead. + .. c:member:: PyMutex ob_mutex + + A :ref:`per-object lock `, present only in the :term:`free-threaded ` + build (when :c:macro:`Py_GIL_DISABLED` is defined). + + This field is **reserved for use by the critical section API** + (:c:macro:`Py_BEGIN_CRITICAL_SECTION` / :c:macro:`Py_END_CRITICAL_SECTION`). + Do **not** lock it directly with ``PyMutex_Lock``; doing so can cause + deadlocks. If you need your own lock, add a separate :c:type:`PyMutex` + field to your object struct. + + .. versionadded:: 3.13 + .. c:type:: PyVarObject diff --git a/Doc/howto/free-threading-extensions.rst b/Doc/howto/free-threading-extensions.rst index 83eba8cfea3969..2f089a3d89680a 100644 --- a/Doc/howto/free-threading-extensions.rst +++ b/Doc/howto/free-threading-extensions.rst @@ -384,6 +384,30 @@ Important Considerations internal extension state, standard mutexes or other synchronization primitives might be more appropriate. +.. _per-object-locks: + +Per-Object Locks (``ob_mutex``) +............................... + +In the free-threaded build, each Python object contains a :c:member:`~PyObject.ob_mutex` +field of type :c:type:`PyMutex`. This mutex is **reserved for use by the +critical section API** (:c:macro:`Py_BEGIN_CRITICAL_SECTION` / +:c:macro:`Py_END_CRITICAL_SECTION`). + +.. warning:: + + Do **not** lock ``ob_mutex`` directly with ``PyMutex_Lock(&obj->ob_mutex)``. + Mixing direct ``PyMutex_Lock`` calls with the critical section API on the + same mutex can cause deadlocks. + +Even if your own code never uses critical sections on a particular object type, +**CPython internals may use the critical section API on any Python object**. + +If your extension type needs its own lock, add a separate :c:type:`PyMutex` +field (or another synchronization primitive) to your object struct. +:c:type:`PyMutex` is very lightweight, so there is negligible cost to having +an additional one. + Building Extensions for the Free-Threaded Build =============================================== From 3f33bf83e8496737b86333bc9ec55dc3ccb3faca Mon Sep 17 00:00:00 2001 From: Serhiy Storchaka Date: Tue, 10 Mar 2026 18:29:23 +0200 Subject: [PATCH 13/19] gh-145743: Fix inconsistency after calling Struct.__init__() with invalid format (GH-145744) Only set the format attribute after successful (re-)initialization. --- Lib/test/test_struct.py | 20 ++++++++++++++++++-- Modules/_struct.c | 29 +++++++++++++++-------------- 2 files changed, 33 insertions(+), 16 deletions(-) diff --git a/Lib/test/test_struct.py b/Lib/test/test_struct.py index 4cbfd7ad8b1e48..6904572d095d31 100644 --- a/Lib/test/test_struct.py +++ b/Lib/test/test_struct.py @@ -584,8 +584,24 @@ def test_Struct_reinitialization(self): # Issue 9422: there was a memory leak when reinitializing a # Struct instance. This test can be used to detect the leak # when running with regrtest -L. - s = struct.Struct('i') - s.__init__('ii') + s = struct.Struct('>h') + s.__init__('>hh') + self.assertEqual(s.format, '>hh') + packed = b'\x00\x01\x00\x02' + self.assertEqual(s.pack(1, 2), packed) + self.assertEqual(s.unpack(packed), (1, 2)) + + with self.assertRaises(UnicodeEncodeError): + s.__init__('\udc00') + self.assertEqual(s.format, '>hh') + self.assertEqual(s.pack(1, 2), packed) + self.assertEqual(s.unpack(packed), (1, 2)) + + with self.assertRaises(struct.error): + s.__init__('$') + self.assertEqual(s.format, '>hh') + self.assertEqual(s.pack(1, 2), packed) + self.assertEqual(s.unpack(packed), (1, 2)) def check_sizeof(self, format_str, number_of_codes): # The size of 'PyStructObject' diff --git a/Modules/_struct.c b/Modules/_struct.c index dcc3c7ec63e9e0..c2f7b1fe0e800a 100644 --- a/Modules/_struct.c +++ b/Modules/_struct.c @@ -1620,11 +1620,11 @@ align(Py_ssize_t size, char c, const formatdef *e) /* calculate the size of a format string */ static int -prepare_s(PyStructObject *self) +prepare_s(PyStructObject *self, PyObject *format) { const formatdef *f; const formatdef *e; - formatcode *codes; + formatcode *codes, *codes0; const char *s; const char *fmt; @@ -1634,8 +1634,8 @@ prepare_s(PyStructObject *self) _structmodulestate *state = get_struct_state_structinst(self); - fmt = PyBytes_AS_STRING(self->s_format); - if (strlen(fmt) != (size_t)PyBytes_GET_SIZE(self->s_format)) { + fmt = PyBytes_AS_STRING(format); + if (strlen(fmt) != (size_t)PyBytes_GET_SIZE(format)) { PyErr_SetString(state->StructError, "embedded null character"); return -1; @@ -1711,13 +1711,7 @@ prepare_s(PyStructObject *self) PyErr_NoMemory(); return -1; } - /* Free any s_codes value left over from a previous initialization. */ - if (self->s_codes != NULL) - PyMem_Free(self->s_codes); - self->s_codes = codes; - self->s_size = size; - self->s_len = len; - + codes0 = codes; s = fmt; size = 0; while ((c = *s++) != '\0') { @@ -1757,6 +1751,14 @@ prepare_s(PyStructObject *self) codes->size = 0; codes->repeat = 0; + /* Free any s_codes value left over from a previous initialization. */ + if (self->s_codes != NULL) + PyMem_Free(self->s_codes); + self->s_codes = codes0; + self->s_size = size; + self->s_len = len; + Py_XSETREF(self->s_format, Py_NewRef(format)); + return 0; overflow: @@ -1820,9 +1822,8 @@ Struct___init___impl(PyStructObject *self, PyObject *format) return -1; } - Py_SETREF(self->s_format, format); - - ret = prepare_s(self); + ret = prepare_s(self, format); + Py_DECREF(format); return ret; } From 9e0802330caca51fed7fc0c8c1dcce2daf03d8bd Mon Sep 17 00:00:00 2001 From: bkap123 <97006829+bkap123@users.noreply.github.com> Date: Tue, 10 Mar 2026 12:30:11 -0400 Subject: [PATCH 14/19] gh-145036: Fix data race for list capacity in free-threading (#145365) Co-authored-by: Kumar Aditya --- Lib/test/test_free_threading/test_list.py | 21 +++++++++++++++++++ ...-02-28-18-42-36.gh-issue-145036.70Kbfz.rst | 1 + Objects/listobject.c | 10 +++++++-- 3 files changed, 30 insertions(+), 2 deletions(-) create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-18-42-36.gh-issue-145036.70Kbfz.rst diff --git a/Lib/test/test_free_threading/test_list.py b/Lib/test/test_free_threading/test_list.py index 27ddc9c2d26dfb..0ede4df103f728 100644 --- a/Lib/test/test_free_threading/test_list.py +++ b/Lib/test/test_free_threading/test_list.py @@ -149,6 +149,27 @@ def reader_list(b, l): with threading_helper.start_threads(threads): pass + # gh-145036: race condition with list.__sizeof__() + def test_list_sizeof_free_threaded_build(self): + L = [] + + def mutate_function(): + for _ in range(100): + L.append(1) + L.pop() + + def size_function(): + for _ in range(100): + L.__sizeof__() + + threads = [] + for _ in range(4): + threads.append(Thread(target=mutate_function)) + threads.append(Thread(target=size_function)) + + with threading_helper.start_threads(threads): + pass + if __name__ == "__main__": unittest.main() diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-18-42-36.gh-issue-145036.70Kbfz.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-18-42-36.gh-issue-145036.70Kbfz.rst new file mode 100644 index 00000000000000..2a565c1d02bc2e --- /dev/null +++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-28-18-42-36.gh-issue-145036.70Kbfz.rst @@ -0,0 +1 @@ +In free-threaded build, fix race condition when calling :meth:`!__sizeof__` on a :class:`list` diff --git a/Objects/listobject.c b/Objects/listobject.c index 7fc21907fefd31..62d04ab150a77a 100644 --- a/Objects/listobject.c +++ b/Objects/listobject.c @@ -3582,8 +3582,14 @@ list___sizeof___impl(PyListObject *self) /*[clinic end generated code: output=3417541f95f9a53e input=b8030a5d5ce8a187]*/ { size_t res = _PyObject_SIZE(Py_TYPE(self)); - Py_ssize_t allocated = FT_ATOMIC_LOAD_SSIZE_RELAXED(self->allocated); - res += (size_t)allocated * sizeof(void*); +#ifdef Py_GIL_DISABLED + PyObject **ob_item = _Py_atomic_load_ptr(&self->ob_item); + if (ob_item != NULL) { + res += list_capacity(ob_item) * sizeof(PyObject *); + } +#else + res += (size_t)self->allocated * sizeof(PyObject *); +#endif return PyLong_FromSize_t(res); } From 50f82d062b3b59a09d6b63648df22d46f7f2b010 Mon Sep 17 00:00:00 2001 From: Benedikt Johannes Date: Tue, 10 Mar 2026 17:33:56 +0100 Subject: [PATCH 15/19] gh-145044: avoid calling `Py_DECREF` in `unsafe_object_compare` on immortal objects (#145045) --- Objects/listobject.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Objects/listobject.c b/Objects/listobject.c index 62d04ab150a77a..1fcedd3a28c91b 100644 --- a/Objects/listobject.c +++ b/Objects/listobject.c @@ -2795,11 +2795,12 @@ unsafe_object_compare(PyObject *v, PyObject *w, MergeState *ms) if (PyBool_Check(res_obj)) { res = (res_obj == Py_True); + assert(_Py_IsImmortal(res_obj)); } else { res = PyObject_IsTrue(res_obj); + Py_DECREF(res_obj); } - Py_DECREF(res_obj); /* Note that we can't assert * res == PyObject_RichCompareBool(v, w, Py_LT); From c4333a12708a917d1cfb6418c04be45793ecc392 Mon Sep 17 00:00:00 2001 From: Sergey B Kirpichev Date: Tue, 10 Mar 2026 19:40:51 +0300 Subject: [PATCH 16/19] gh-144173: fix flaky test_complex.test_truediv() (#144355) Previously, component-wise relative error bound was tested. However, such bound can't exist already for complex multiplication as one can be used to perform subtraction of floating-point numbers, e.g. x and y for z0=1+1j and z1=x+yj. ```pycon >>> x, y = 1e-9+1j, 1+1j >>> a = x*y*y.conjugate()/2;a (1.0000000272292198e-09+1j) >>> b = x*(y*y.conjugate()/2);b (1e-09+1j) >>> b == x True >>> (a.real-b.real)/math.ulp(b.real) 131672427.0 ``` --- Lib/test/test_complex.py | 41 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 21 deletions(-) diff --git a/Lib/test/test_complex.py b/Lib/test/test_complex.py index 0c7e7341f13d4e..bee2aceb187027 100644 --- a/Lib/test/test_complex.py +++ b/Lib/test/test_complex.py @@ -72,8 +72,8 @@ def assertAlmostEqual(self, a, b): else: unittest.TestCase.assertAlmostEqual(self, a, b) - def assertCloseAbs(self, x, y, eps=1e-9): - """Return true iff floats x and y "are close".""" + def assertClose(self, x, y, eps=1e-9): + """Return true iff complexes x and y "are close".""" # put the one with larger magnitude second if abs(x) > abs(y): x, y = y, x @@ -82,26 +82,15 @@ def assertCloseAbs(self, x, y, eps=1e-9): if x == 0: return abs(y) < eps # check that relative difference < eps - self.assertTrue(abs((x-y)/y) < eps) - - def assertClose(self, x, y, eps=1e-9): - """Return true iff complexes x and y "are close".""" - self.assertCloseAbs(x.real, y.real, eps) - self.assertCloseAbs(x.imag, y.imag, eps) + self.assertTrue(abs(x-y)/abs(y) < eps) def check_div(self, x, y): """Compute complex z=x*y, and check that z/x==y and z/y==x.""" z = x * y - if x != 0: - q = z / x - self.assertClose(q, y) - q = z.__truediv__(x) - self.assertClose(q, y) - if y != 0: - q = z / y - self.assertClose(q, x) - q = z.__truediv__(y) - self.assertClose(q, x) + if x: + self.assertClose(z / x, y) + if y: + self.assertClose(z / y, x) def test_truediv(self): simple_real = [float(i) for i in range(-5, 6)] @@ -115,10 +104,20 @@ def test_truediv(self): self.check_div(complex(1e200, 1e200), 1+0j) self.check_div(complex(1e-200, 1e-200), 1+0j) + # Smith's algorithm has several sources of inaccuracy + # for components of the result. In examples below, + # it's cancellation of digits in computation of sum. + self.check_div(1e-09+1j, 1+1j) + self.check_div(8.289760544677449e-09+0.13257307440728516j, + 0.9059966714925808+0.5054864708672686j) + # Just for fun. for i in range(100): - self.check_div(complex(random(), random()), - complex(random(), random())) + x = complex(random(), random()) + y = complex(random(), random()) + self.check_div(x, y) + y = complex(1e10*y.real, y.imag) + self.check_div(x, y) self.assertAlmostEqual(complex.__truediv__(2+0j, 1+1j), 1-1j) self.assertRaises(TypeError, operator.truediv, 1j, None) @@ -454,7 +453,7 @@ def test_boolcontext(self): self.assertTrue(1j) def test_conjugate(self): - self.assertClose(complex(5.3, 9.8).conjugate(), 5.3-9.8j) + self.assertEqual(complex(5.3, 9.8).conjugate(), 5.3-9.8j) def test_constructor(self): def check(z, x, y): From f26eca7732ca9d0e6893e3fdfdfd4c25339c7155 Mon Sep 17 00:00:00 2001 From: Sam Gross Date: Tue, 10 Mar 2026 12:47:12 -0400 Subject: [PATCH 17/19] gh-145685: Update find_name_in_mro() to return a _PyStackRef (gh-145693) --- Objects/typeobject.c | 80 +++++++++++++++++++------------------------- 1 file changed, 35 insertions(+), 45 deletions(-) diff --git a/Objects/typeobject.c b/Objects/typeobject.c index 81abb0990eebe9..5dc96bf251b384 100644 --- a/Objects/typeobject.c +++ b/Objects/typeobject.c @@ -5978,15 +5978,16 @@ PyObject_GetItemData(PyObject *obj) } /* Internal API to look for a name through the MRO, bypassing the method cache. - This returns a borrowed reference, and might set an exception. - 'error' is set to: -1: error with exception; 1: error without exception; 0: ok */ -static PyObject * -find_name_in_mro(PyTypeObject *type, PyObject *name, int *error) + The result is stored as a _PyStackRef in `out`. It never set an exception. + Returns -1 if there was an error, 0 if the name was not found, and 1 if + the name was found. */ +static int +find_name_in_mro(PyTypeObject *type, PyObject *name, _PyStackRef *out) { Py_hash_t hash = _PyObject_HashFast(name); if (hash == -1) { - *error = -1; - return NULL; + PyErr_Clear(); + return -1; } /* Look in tp_dict of types in MRO */ @@ -5994,37 +5995,42 @@ find_name_in_mro(PyTypeObject *type, PyObject *name, int *error) if (mro == NULL) { if (!is_readying(type)) { if (PyType_Ready(type) < 0) { - *error = -1; - return NULL; + PyErr_Clear(); + return -1; } mro = lookup_tp_mro(type); } if (mro == NULL) { - *error = 1; - return NULL; + return -1; } } - PyObject *res = NULL; + int res = 0; + PyThreadState *tstate = _PyThreadState_GET(); /* Keep a strong reference to mro because type->tp_mro can be replaced during dict lookup, e.g. when comparing to non-string keys. */ - Py_INCREF(mro); + _PyCStackRef mro_ref; + _PyThreadState_PushCStackRef(tstate, &mro_ref); + mro_ref.ref = PyStackRef_FromPyObjectNew(mro); Py_ssize_t n = PyTuple_GET_SIZE(mro); for (Py_ssize_t i = 0; i < n; i++) { PyObject *base = PyTuple_GET_ITEM(mro, i); PyObject *dict = lookup_tp_dict(_PyType_CAST(base)); assert(dict && PyDict_Check(dict)); - if (_PyDict_GetItemRef_KnownHash((PyDictObject *)dict, name, hash, &res) < 0) { - *error = -1; + Py_ssize_t ix = _Py_dict_lookup_threadsafe_stackref( + (PyDictObject *)dict, name, hash, out); + if (ix == DKIX_ERROR) { + PyErr_Clear(); + res = -1; goto done; } - if (res != NULL) { + if (!PyStackRef_IsNull(*out)) { + res = 1; break; } } - *error = 0; done: - Py_DECREF(mro); + _PyThreadState_PopCStackRef(tstate, &mro_ref); return res; } @@ -6179,11 +6185,11 @@ _PyType_LookupStackRefAndVersion(PyTypeObject *type, PyObject *name, _PyStackRef // We need to atomically do the lookup and capture the version before // anyone else can modify our mro or mutate the type. - PyObject *res; - int error; + int res; PyInterpreterState *interp = _PyInterpreterState_GET(); int has_version = 0; unsigned int assigned_version = 0; + BEGIN_TYPE_LOCK(); // We must assign the version before doing the lookup. If // find_name_in_mro() blocks and releases the critical section @@ -6192,35 +6198,24 @@ _PyType_LookupStackRefAndVersion(PyTypeObject *type, PyObject *name, _PyStackRef has_version = assign_version_tag(interp, type); assigned_version = type->tp_version_tag; } - res = find_name_in_mro(type, name, &error); + res = find_name_in_mro(type, name, out); END_TYPE_LOCK(); /* Only put NULL results into cache if there was no error. */ - if (error) { - /* It's not ideal to clear the error condition, - but this function is documented as not setting - an exception, and I don't want to change that. - E.g., when PyType_Ready() can't proceed, it won't - set the "ready" flag, so future attempts to ready - the same type will call it again -- hopefully - in a context that propagates the exception out. - */ - if (error == -1) { - PyErr_Clear(); - } + if (res < 0) { *out = PyStackRef_NULL; return 0; } if (has_version) { + PyObject *res_obj = PyStackRef_AsPyObjectBorrow(*out); #if Py_GIL_DISABLED - update_cache_gil_disabled(entry, name, assigned_version, res); + update_cache_gil_disabled(entry, name, assigned_version, res_obj); #else - PyObject *old_value = update_cache(entry, name, assigned_version, res); + PyObject *old_value = update_cache(entry, name, assigned_version, res_obj); Py_DECREF(old_value); #endif } - *out = res ? PyStackRef_FromPyObjectSteal(res) : PyStackRef_NULL; return has_version ? assigned_version : 0; } @@ -11709,7 +11704,6 @@ update_one_slot(PyTypeObject *type, pytype_slotdef *p, pytype_slotdef **next_p, int use_generic = 0; int offset = p->offset; - int error; void **ptr = slotptr(type, offset); if (ptr == NULL) { @@ -11725,19 +11719,15 @@ update_one_slot(PyTypeObject *type, pytype_slotdef *p, pytype_slotdef **next_p, assert(!PyErr_Occurred()); do { /* Use faster uncached lookup as we won't get any cache hits during type setup. */ - descr = find_name_in_mro(type, p->name_strobj, &error); - if (descr == NULL) { - if (error == -1) { - /* It is unlikely but not impossible that there has been an exception - during lookup. Since this function originally expected no errors, - we ignore them here in order to keep up the interface. */ - PyErr_Clear(); - } + _PyStackRef descr_ref; + int res = find_name_in_mro(type, p->name_strobj, &descr_ref); + if (res <= 0) { if (ptr == (void**)&type->tp_iternext) { specific = (void *)_PyObject_NextNotImplemented; } continue; } + descr = PyStackRef_AsPyObjectBorrow(descr_ref); if (Py_IS_TYPE(descr, &PyWrapperDescr_Type) && ((PyWrapperDescrObject *)descr)->d_base->name_strobj == p->name_strobj) { void **tptr; @@ -11815,7 +11805,7 @@ update_one_slot(PyTypeObject *type, pytype_slotdef *p, pytype_slotdef **next_p, } } } - Py_DECREF(descr); + PyStackRef_CLOSE(descr_ref); } while ((++p)->offset == offset); void *slot_value; From 9c1c71066e34b11649735e8acb4765a85c76336f Mon Sep 17 00:00:00 2001 From: Sam Gross Date: Tue, 10 Mar 2026 12:55:29 -0400 Subject: [PATCH 18/19] gh-145010: Fix Python.h compilation with -masm=intel (#145011) --- Include/object.h | 6 +++--- Lib/test/test_cppext/__init__.py | 20 ++++++++++++++++--- Lib/test/test_cppext/setup.py | 4 ++++ ...-02-19-18-39-11.gh-issue-145010.mKzjci.rst | 2 ++ 4 files changed, 26 insertions(+), 6 deletions(-) create mode 100644 Misc/NEWS.d/next/C_API/2026-02-19-18-39-11.gh-issue-145010.mKzjci.rst diff --git a/Include/object.h b/Include/object.h index ad452be8405671..3fb28035a50547 100644 --- a/Include/object.h +++ b/Include/object.h @@ -206,11 +206,11 @@ _Py_ThreadId(void) #elif defined(__MINGW32__) && defined(_M_ARM64) tid = __getReg(18); #elif defined(__i386__) - __asm__("movl %%gs:0, %0" : "=r" (tid)); // 32-bit always uses GS + __asm__("{movl %%gs:0, %0|mov %0, dword ptr gs:[0]}" : "=r" (tid)); // 32-bit always uses GS #elif defined(__MACH__) && defined(__x86_64__) - __asm__("movq %%gs:0, %0" : "=r" (tid)); // x86_64 macOSX uses GS + __asm__("{movq %%gs:0, %0|mov %0, qword ptr gs:[0]}" : "=r" (tid)); // x86_64 macOSX uses GS #elif defined(__x86_64__) - __asm__("movq %%fs:0, %0" : "=r" (tid)); // x86_64 Linux, BSD uses FS + __asm__("{movq %%fs:0, %0|mov %0, qword ptr fs:[0]}" : "=r" (tid)); // x86_64 Linux, BSD uses FS #elif defined(__arm__) && __ARM_ARCH >= 7 __asm__ ("mrc p15, 0, %0, c13, c0, 3\nbic %0, %0, #3" : "=r" (tid)); #elif defined(__aarch64__) && defined(__APPLE__) diff --git a/Lib/test/test_cppext/__init__.py b/Lib/test/test_cppext/__init__.py index 1fd01702f64029..5b4c97c181bb6a 100644 --- a/Lib/test/test_cppext/__init__.py +++ b/Lib/test/test_cppext/__init__.py @@ -1,6 +1,7 @@ # gh-91321: Build a basic C++ test extension to check that the Python C API is # compatible with C++ and does not emit C++ compiler warnings. import os.path +import platform import shlex import shutil import subprocess @@ -28,13 +29,16 @@ class BaseTests: TEST_INTERNAL_C_API = False - def check_build(self, extension_name, std=None, limited=False): + def check_build(self, extension_name, std=None, limited=False, + extra_cflags=None): venv_dir = 'env' with support.setup_venv_with_pip_setuptools(venv_dir) as python_exe: self._check_build(extension_name, python_exe, - std=std, limited=limited) + std=std, limited=limited, + extra_cflags=extra_cflags) - def _check_build(self, extension_name, python_exe, std, limited): + def _check_build(self, extension_name, python_exe, std, limited, + extra_cflags=None): pkg_dir = 'pkg' os.mkdir(pkg_dir) shutil.copy(SETUP, os.path.join(pkg_dir, os.path.basename(SETUP))) @@ -48,6 +52,8 @@ def run_cmd(operation, cmd): env['CPYTHON_TEST_LIMITED'] = '1' env['CPYTHON_TEST_EXT_NAME'] = extension_name env['TEST_INTERNAL_C_API'] = str(int(self.TEST_INTERNAL_C_API)) + if extra_cflags: + env['CPYTHON_TEST_EXTRA_CFLAGS'] = extra_cflags if support.verbose: print('Run:', ' '.join(map(shlex.quote, cmd))) subprocess.run(cmd, check=True, env=env) @@ -116,6 +122,14 @@ def test_build_cpp11(self): def test_build_cpp14(self): self.check_build('_testcpp14ext', std='c++14') + # Test that headers compile with Intel asm syntax, which may conflict + # with inline assembly in free-threading headers that use AT&T syntax. + @unittest.skipIf(support.MS_WINDOWS, "MSVC doesn't support -masm=intel") + @unittest.skipUnless(platform.machine() in ('x86_64', 'i686', 'AMD64'), + "x86-specific flag") + def test_build_intel_asm(self): + self.check_build('_testcppext_asm', extra_cflags='-masm=intel') + class TestInteralCAPI(BaseTests, unittest.TestCase): TEST_INTERNAL_C_API = True diff --git a/Lib/test/test_cppext/setup.py b/Lib/test/test_cppext/setup.py index 2d9052a6b879da..14aeafefcaa8f7 100644 --- a/Lib/test/test_cppext/setup.py +++ b/Lib/test/test_cppext/setup.py @@ -86,6 +86,10 @@ def main(): if internal: cppflags.append('-DTEST_INTERNAL_C_API=1') + extra_cflags = os.environ.get("CPYTHON_TEST_EXTRA_CFLAGS", "") + if extra_cflags: + cppflags.extend(shlex.split(extra_cflags)) + # On Windows, add PCbuild\amd64\ to include and library directories include_dirs = [] library_dirs = [] diff --git a/Misc/NEWS.d/next/C_API/2026-02-19-18-39-11.gh-issue-145010.mKzjci.rst b/Misc/NEWS.d/next/C_API/2026-02-19-18-39-11.gh-issue-145010.mKzjci.rst new file mode 100644 index 00000000000000..7f5be699c6348d --- /dev/null +++ b/Misc/NEWS.d/next/C_API/2026-02-19-18-39-11.gh-issue-145010.mKzjci.rst @@ -0,0 +1,2 @@ +Use GCC dialect alternatives for inline assembly in ``object.h`` so that the +Python headers compile correctly with ``-masm=intel``. From 4d0dce0c8ddc4d0321bd590a1a33990edc2e1b08 Mon Sep 17 00:00:00 2001 From: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Date: Tue, 10 Mar 2026 16:57:34 +0000 Subject: [PATCH 19/19] Fix integer overflow for formats "s" and "p" in the struct module (GH-145750) --- Lib/test/test_struct.py | 6 ++++++ .../2026-03-10-14-13-12.gh-issue-145750.iQsTeX.rst | 3 +++ Modules/_struct.c | 8 +++++++- 3 files changed, 16 insertions(+), 1 deletion(-) create mode 100644 Misc/NEWS.d/next/Library/2026-03-10-14-13-12.gh-issue-145750.iQsTeX.rst diff --git a/Lib/test/test_struct.py b/Lib/test/test_struct.py index 6904572d095d31..55e2ce590a2577 100644 --- a/Lib/test/test_struct.py +++ b/Lib/test/test_struct.py @@ -555,6 +555,12 @@ def test_count_overflow(self): hugecount3 = '{}i{}q'.format(sys.maxsize // 4, sys.maxsize // 8) self.assertRaises(struct.error, struct.calcsize, hugecount3) + hugecount4 = '{}?s'.format(sys.maxsize) + self.assertRaises(struct.error, struct.calcsize, hugecount4) + + hugecount5 = '{}?p'.format(sys.maxsize) + self.assertRaises(struct.error, struct.calcsize, hugecount5) + def test_trailing_counter(self): store = array.array('b', b' '*100) diff --git a/Misc/NEWS.d/next/Library/2026-03-10-14-13-12.gh-issue-145750.iQsTeX.rst b/Misc/NEWS.d/next/Library/2026-03-10-14-13-12.gh-issue-145750.iQsTeX.rst new file mode 100644 index 00000000000000..a909bea2caffe9 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2026-03-10-14-13-12.gh-issue-145750.iQsTeX.rst @@ -0,0 +1,3 @@ +Avoid undefined behaviour from signed integer overflow when parsing format +strings in the :mod:`struct` module. Found by OSS Fuzz in +:oss-fuzz:`488466741`. diff --git a/Modules/_struct.c b/Modules/_struct.c index c2f7b1fe0e800a..f8574322b40c8d 100644 --- a/Modules/_struct.c +++ b/Modules/_struct.c @@ -1676,7 +1676,13 @@ prepare_s(PyStructObject *self, PyObject *format) switch (c) { case 's': _Py_FALLTHROUGH; - case 'p': len++; ncodes++; break; + case 'p': + if (len == PY_SSIZE_T_MAX) { + goto overflow; + } + len++; + ncodes++; + break; case 'x': break; default: if (num > PY_SSIZE_T_MAX - len) {