[issue44498] move deprecated asynchat, asyncore and smtpd from the stdlib to test.support

[Christian Heimes]

Christian Heimes <lists at cheimes.de> added the comment:

I'm with Petr, please follow PEP 4 and PEP 387. At a bare minimum you should have one minor Python version with deprecation warnings. You could ask Pablo if he allows to add deprecation warnings to Python 3.10 beta.

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nosy: +christian.heimes

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