cpython/Doc/library/chunk.rst

:mod:`!chunk` --- Read IFF chunked data
=======================================

.. module:: chunk
   :synopsis: Removed in 3.13.
   :deprecated:

.. deprecated-removed:: 3.11 3.13

This module is no longer part of the Python standard library.
It was :ref:`removed in Python 3.13 <whatsnew313-pep594>` after
being deprecated in Python 3.11.  The removal was decided in :pep:`594`.

The last version of Python that provided the :mod:`!chunk` module was
`Python 3.12 <https://docs.python.org/3.12/library/chunk.html>`_.