Serhiy Storchaka [Mon, 18 Aug 2025 16:28:56 +0000 (19:28 +0300)]
gh-137044: Make resource.RLIM_INFINITY always positive (GH-137511)
It is now a positive integer larger larger than any limited resource value.
This simplifies comparison of the resource values.
Previously, it could be negative, such as -1 or -3, depending on platform.
Deprecation warning is emitted if the old negative value is passed.
Petr Viktorin [Mon, 18 Aug 2025 12:25:51 +0000 (14:25 +0200)]
gh-135228: Create __dict__ and __weakref__ descriptors for object (GH-136966)
This partially reverts #137047, keeping the tests for GC collectability of the
original class that dataclass adds `__slots__` to.
The reference leaks solved there are instead solved by having the `__dict__` &
`__weakref__` descriptors not tied to (and referencing) their class.
Instead, they're shared between all classes that need them (within
an interpreter).
The `__objclass__` ol the descriptors is set to `object`, since these
descriptors work with *any* object. (The appropriate checks were already
made in the get/set code, so the `__objclass__` check was redundant.)
The repr of these descriptors (and any others whose `__objclass__` is `object`)
now doesn't mention the objclass.
This change required adjustment of introspection code that checks
`__objclass__` to determine an object's “own” (i.e. not inherited) `__dict__`.
Third-party code that does similar introspection of the internals will also
need adjusting.
Removes deprecated behaviors, including support for `PackageMetadata.__getitem__` returning None for missing keys and Distribution subclasses not implementing abstract methods.
Prioritizes valid dists to invalid dists when retrieving by name (python/cpython/#120492). Adds SimplePath to `importlib.metadata.__all__`.
Justin Applegate [Thu, 14 Aug 2025 19:22:37 +0000 (13:22 -0600)]
gh-135241: Make unpickling of booleans in protocol 0 more strict (GH-135242)
The Python pickle module looks for "00" and "01" but _pickle only looked
for 2 characters that parsed to 0 or 1, meaning some payloads like "+0" or
" 0" would lead to different results in different implementations.
Serhiy Storchaka [Thu, 14 Aug 2025 18:13:22 +0000 (21:13 +0300)]
gh-135661: Fix CDATA section parsing in HTMLParser (GH-135665)
"] ]>" and "]] >" no longer end the CDATA section.
Make CDATA section parsing context depending.
Add private method HTMLParser._set_support_cdata() to change the context.
If called with True, "<[CDATA[" starts a CDATA section which ends with "]]>".
If called with False, "<[CDATA[" starts a bogus comments which ends with ">".
Sam Gross [Wed, 13 Aug 2025 18:15:12 +0000 (14:15 -0400)]
gh-137400: Fix thread-safety issues when profiling all threads (gh-137518)
There were a few thread-safety issues when profiling or tracing all
threads via PyEval_SetProfileAllThreads or PyEval_SetTraceAllThreads:
* The loop over thread states could crash if a thread exits concurrently
(in both the free threading and default build)
* The modification of `c_profilefunc` and `c_tracefunc` wasn't
thread-safe on the free threading build.
Jelle Zijlstra [Wed, 13 Aug 2025 13:47:47 +0000 (06:47 -0700)]
gh-137226: Fix behavior of ForwardRef.evaluate with type_params (#137227)
The previous behavior was copied from earlier typing code. It works around the way
typing.get_type_hints passes its namespaces, but I don't think the behavior is logical
or correct.
Petr Viktorin [Wed, 13 Aug 2025 07:03:05 +0000 (09:03 +0200)]
gh-131146: Fall back to `month_name` if `standalone_month_name`s aren't distinct (GH-137674)
Some systems reportedly don't expand '%OB' and '%Ob'.
In this case (and similar theoretically possible ones, like expanding to empty
string or 'OB'), fall back to the month_name & month_abbr.
RafaelWO [Tue, 12 Aug 2025 19:28:27 +0000 (21:28 +0200)]
gh-136672: Docs: Move Enum functions and add examples (GH-136791)
* Docs: Move Enum functions and add examples
When the `Enum` functions `_add_alias_` and `_add_value_alias_` were added in de6bca956432cc852a4a41e2a2cee9cdacd19f35, the documentation for them was done under `EnumType` instead of `Enum`.
This change moves them to the docs of the `Enum` class and adds an example for each function.
Jelle Zijlstra [Tue, 12 Aug 2025 11:16:54 +0000 (04:16 -0700)]
gh-135228: When @dataclass(slots=True) replaces a dataclass, make the original class collectible (take 2) (GH-137047)
Remove the `__dict__` and `__weakref__` descriptors from the original class when creating a dataclass from it.
An interesting hack, but more localized in scope than gh-135230.
This may be a breaking change if people intentionally keep the original class around
when using `@dataclass(slots=True)`, and then use `__dict__` or `__weakref__` on the
original class.
Brett Cannon [Mon, 11 Aug 2025 23:18:54 +0000 (16:18 -0700)]
GH-137426: Remove code deprecation of `importlib.abc.ResourceLoader` (GH-137567)
Enough other classes in `importlib.abc` inherit from the class and the deprecation was to redirect people to `TraversableResources`. The documentation now makes it clear the class only exists for backwards compatibility.
---------
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Sam Gross [Mon, 11 Aug 2025 15:41:44 +0000 (11:41 -0400)]
gh-137400: Fix a crash when disabling profiling across all threads (gh-137471)
The `PyEval_SetProfileAllThreads` function and other related functions
had a race condition on `tstate->c_profilefunc` that could lead to a
crash when disable profiling or tracing on all threads while another
thread is starting to profile or trace a a call.
There are still potential crashes when threads exit concurrently with
profiling or tracing be enabled/disabled across all threads.
gh-137026: Add an explainer guide for asyncio (GH-137215)
* - Add an explainer guide (aka HOWTO, not how-to) for asyncio.
* Fix linter errors.
* - Enforce max line length of roughly 79 chars.
- Start sentences on new lines to minimize disruption of diffs.
* Add reference to subinterpreters.
* - Significantly reduce article size. Remove both example sections & "Which concurrency do I want" section.
* Align section-header lengths with section names.
* - Remove reference to deleted section.
* - Fix a variety of rote style guide items like title-alignment, use of ie and $, and so forth.
- Add links to other parts of the docs for keywords and objects like await, coro, task, future, etc.
* - One last title alignment.
* - Style nit.
* - Rework a variety of I statements.
* Lint fix.
* - Firm up commentary on yield from in corotuines.
Remove private _PyThreadState and _PyInterpreterState C API
functions: move them to the internal C API (pycore_pystate.h and
pycore_interp.h). Don't export most of these functions anymore, but
still export functions used by tests.
Remove _PyThreadState_Prealloc() and _PyThreadState_Init() from the C
API, but keep it in the stable API.
GH-135552: Make the GC clear weakrefs later (GH-136189)
Fix a bug caused by the garbage collector clearing weakrefs too early. The
weakrefs in the ``tp_subclasses`` dictionary are needed in order to correctly
invalidate type caches (for example, by calling ``PyType_Modified()``).
Clearing weakrefs before calling finalizers causes the caches to not be
correctly invalidated. That can cause crashes since the caches can refer to
invalid objects. Defer the clearing of weakrefs without callbacks until after
finalizers are executed.
GH-119085: Move comment in Python/gc.c to correct place.
In GH-116206, the comment about moving reachable objects to next generation
got moved from its original place to a place where there is no code below
it. Put the comment back to where the actual movement of reachable objects
happens.
projects / thirdparty / Python / cpython.git / log
