cpython/Doc/library/asyncore.rst

:mod:`!asyncore` --- Asynchronous socket handler
================================================

.. module:: asyncore
   :synopsis: Removed in 3.12.
   :deprecated:

.. deprecated-removed:: 3.6 3.12

This module is no longer part of the Python standard library.
It was :ref:`removed in Python 3.12 <whatsnew312-removed>` after
being deprecated in Python 3.6.  The removal was decided in :pep:`594`.

Applications should use the :mod:`asyncio` module instead.

The last version of Python that provided the :mod:`!asyncore` module was
`Python 3.11 <https://docs.python.org/3.11/library/asyncore.html>`_.