PEP 594 – Removing dead batteries from the standard library [1] removes asyncore and asynchat in 3.12 with the following note:

> The asyncore module is also used in stdlib tests. The tests for ftplib, logging, smptd, smtplib, and ssl are partly based on asyncore. These tests must be updated to use asyncio or threading.

(Note: the tests for `os` module are not mentioned and smtpd will be removed in 3.12 along with its tests anyway)

I'm performing the update now to avoid keeping asynchat and asyncore as private subpackages of `test` package.

[1] https://peps.python.org/pep-0594/