Import CPython 3.14.5+ stable branch (2026-05-13)

Summary:
Imported python/cpython `3.14.5+` from upstream rev [`2dedb4c`](https://www.github.com/python/cpython/commit/2dedb4c846efe1f461d271ccce353d1521ce83aa) (committed 2026-05-13 16:21:23+00:00).

# Commit Info

Base: (`3.14.5+`) - [`74cca9a`](https://www.github.com/python/cpython/commit/74cca9a92fb7d653e404843a56b8bdc7b0afdbbf) (commit date: 2026-05-11 09:57:50+00:00)
Imported: (`3.14.5+`) - [`2dedb4c`](https://www.github.com/python/cpython/commit/2dedb4c846efe1f461d271ccce353d1521ce83aa) (commit date: 2026-05-13 16:21:23+00:00)

# Noteworthy file changes

- Test files (1 added)
- Low-signal files (4 added) (NEWS.d, docs, .github)

Complete list of added/removed files: https://www.internalfb.com/intern/everpaste/?color=0&handle=GAgz6iD7QKuU_mUDAP8cwiSNH8oybr0LAAAz

Differential Revision: D105034713

fbshipit-source-id: 147b0df3592057108dfe23bd2ce0fa3f5f78189d

Author: itamaro

.github/CODEOWNERS

@@ -213,7 +213,7 @@ Lib/test/test_ast/            @eclips4
 **/*multiprocessing*          @gpshead
 
 # SQLite 3
-**/*sqlite*                   @berkerpeksag @erlend-aasland
+**/*sqlite*                   @erlend-aasland
 
 # subprocess
 /Lib/subprocess.py            @gpshead

.github/workflows/mypy.yml

@@ -68,11 +68,11 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+      - uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
         with:
           python-version: "3.13"
-          cache: pip
-          cache-dependency-path: Tools/requirements-dev.txt
-      - run: pip install -r Tools/requirements-dev.txt
+          activate-environment: true
+          cache-dependency-glob: Tools/requirements-dev.txt
+      - run: uv pip install -r Tools/requirements-dev.txt
       - run: python3 Misc/mypy/make_symlinks.py --symlink
-      - run: mypy --config-file ${{ matrix.target }}/mypy.ini
+      - run: mypy --num-workers 4 --config-file ${{ matrix.target }}/mypy.ini

Doc/data/python3.14.abi

@@ -497,7 +497,8 @@ Module contents
 .. function:: is_dataclass(obj)
 
    Return ``True`` if its parameter is a dataclass (including subclasses of a
-   dataclass) or an instance of one, otherwise return ``False``.
+   dataclass, but not including :ref:`generic aliases <types-genericalias>`)
+   or an instance of one, otherwise return ``False``.
 
    If you need to know if a class is an instance of a dataclass (and
    not a dataclass itself), then add a further check for ``not

Doc/library/dataclasses.rst

@@ -399,6 +399,9 @@ attributes (see :ref:`import-mod-attrs` for module attributes):
    Return ``True`` if the object is a class, whether built-in or created in Python
    code.
 
+   This function returns ``False`` for :ref:`generic aliases <types-genericalias>` of classes,
+   such as ``list[int]``.
+
 
 .. function:: ismethod(object)
 

Doc/library/inspect.rst

@@ -214,7 +214,7 @@ Basic Usage
       a string (such as ``"\t"``) is used to indent each level.
       If zero, negative, or ``""`` (the empty string),
       only newlines are inserted.
-      If ``None`` (the default), the most compact representation is used.
+      If ``None`` (the default), no newlines are inserted.
    :type indent: int | str | None
 
    :param separators:

Doc/library/json.rst

@@ -59,7 +59,7 @@ The :mod:`!pickle` module differs from :mod:`marshal` in several significant way
 * :mod:`marshal` cannot be used to serialize user-defined classes and their
   instances.  :mod:`!pickle` can save and restore class instances transparently,
   however the class definition must be importable and live in the same module as
-  when the object was stored.
+  when the object was pickled.
 
 * The :mod:`marshal` serialization format is not guaranteed to be portable
   across Python versions.  Because its primary job in life is to support
@@ -696,7 +696,10 @@ or both.
    If a string is returned, the string should be interpreted as the name of a
    global variable.  It should be the object's local name relative to its
    module; the pickle module searches the module namespace to determine the
-   object's module.  This behaviour is typically useful for singletons.
+   object's module: for a given ``obj`` to be pickled, the ``__module__``
+   attribute is looked up on ``obj`` directly, which falls back to a lookup
+   on the type of ``obj`` if no ``__module__`` instance attribute is set.
+   This behaviour is typically useful for singletons.
 
    When a tuple is returned, it must be between two and six items long.
    Optional items can either be omitted, or ``None`` can be provided as their

Doc/library/pickle.rst

@@ -5783,7 +5783,8 @@ type and the :class:`bytes` data type:
 
 ``GenericAlias`` objects are instances of the class
 :class:`types.GenericAlias`, which can also be used to create ``GenericAlias``
-objects directly.
+objects directly. Specializations of user-defined :ref:`generic classes <generic-classes>`
+may not be instances of :class:`types.GenericAlias`, but they provide similar functionality.
 
 .. describe:: T[X, Y, ...]
 

Doc/library/stdtypes.rst

@@ -3480,14 +3480,27 @@ Introspection helpers
 
    Determine if a type is a :class:`Protocol`.
 
-   For example::
+   For example:
+
+   .. testcode::
 
       class P(Protocol):
           def a(self) -> str: ...
           b: int
 
-      is_protocol(P)    # => True
-      is_protocol(int)  # => False
+      assert is_protocol(P)
+      assert not is_protocol(int)
+
+   This function only returns true for ``Protocol`` classes, not for
+   :ref:`generic aliases <types-genericalias>` of them:
+
+   .. testcode::
+
+      class GenericP[T](Protocol):
+          def a(self) -> T: ...
+          b: int
+
+      assert not is_protocol(GenericP[int])
 
    .. versionadded:: 3.13
 
@@ -3510,6 +3523,17 @@ Introspection helpers
       # not a typed dict itself
       assert not is_typeddict(TypedDict)
 
+   This function only returns true for ``TypedDict`` classes, not for
+   :ref:`generic aliases <types-genericalias>` of them:
+
+   .. testcode::
+
+      class GenericFilm[T](TypedDict):
+          title: str
+          year: T
+
+      assert not is_typeddict(GenericFilm[int])
+
    .. versionadded:: 3.10
 
 .. class:: ForwardRef

Doc/library/typing.rst

@@ -1237,10 +1237,10 @@ Test cases
    | :meth:`assertNotEndsWith(a, b)        | ``not a.endswith(b)``          | 3.14         |
    | <TestCase.assertNotEndsWith>`         |                                |              |
    +---------------------------------------+--------------------------------+--------------+
-   | :meth:`assertHasAttr(a, b)            | ``hastattr(a, b)``             | 3.14         |
+   | :meth:`assertHasAttr(a, b)            | ``hasattr(a, b)``              | 3.14         |
    | <TestCase.assertHasAttr>`             |                                |              |
    +---------------------------------------+--------------------------------+--------------+
-   | :meth:`assertNotHasAttr(a, b)         | ``not hastattr(a, b)``         | 3.14         |
+   | :meth:`assertNotHasAttr(a, b)         | ``not hasattr(a, b)``          | 3.14         |
    | <TestCase.assertNotHasAttr>`          |                                |              |
    +---------------------------------------+--------------------------------+--------------+