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gh-76595: Add note on PyCapsule_Import behavior #134022

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Jun 28, 2025
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gh-76595: Add note on PyCapsule_Import behavior #134022

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gh-76595: Add note on `PyCapsule_Import` behavior
NicolasT May 14, 2025
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NicolasT May 15, 2025
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Merge branch 'main' into document-pycapsule-import-attr-lookup
ZeroIntensity Jun 27, 2025
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8 changes: 8 additions & 0 deletions Doc/c-api/capsule.rst
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Expand Up @@ -108,6 +108,14 @@ Refer to :ref:`using-capsules` for more information on using these objects.
Return the capsule's internal *pointer* on success. On failure, set an
exception and return ``NULL``.

.. note::

:c:func:`PyCapsule_Import` splits *name* on the ``.`` character, and
imports the first element. It then processes further elements using
attribute lookups. As a result, if *name* points to an attribute in
some submodule or subpackage, this submodule or subpackage must be
previously imported using other means (e.g. by using :c:func:`PyImport_ImportModule`).

.. versionchanged:: 3.3
*no_block* has no effect anymore.

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