github-actions released this 04 Jan 13:13

· 204 commits to master since this release

3.2.4

21bda42

3.2.4 (2026-01-04)

==================

Features added
--------------

* In preparation of Cython 3.3, a new decorator ``@collection_type(tname)`` can be used
  to advertise an extension type as being a ``'sequence'`` or ``'mapping'``.  This currently
  only has the effect of setting the ``Py_TPFLAGS_SEQUENCE`` flag on the type or not, but
  is provided for convenience to allow using the new decorator already in Cython 3.2 code.

* Several C++ exception declarations were added to ``libcpp.exceptions``.
  (Github issue :issue:`7389`)

Bugs fixed
----------

* Pseudo-literal default values of function arguments like ``arg=str()`` could generate
  invalid C code when internally converted into a real literal.
  (Github issue :issue:`6192`)

* The pickle serialisation of extension types using the ``auto_pickle`` feature was
  larger than necessary since 3.2.0 for types without Python object attributes.
  It is now back to the state before 3.2.0 again.
  (Github issue :issue:`7443`)

* Constants are now only made immortal on freethreading Python if they are not shared.
  (Github issue :issue:`7439`)

* ``PyDict_SetDefaultRef()`` is now used when available to avoid temporary borrowed references.
  (Github issue :issue:`7347`)

* Includes all fixes as of Cython 3.1.8.