commit a80a38ee9a7b2e26dba848793cc298d8435fddd5
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Thu Jun 24 12:57:55 2021 -0700
committer GitHub <noreply@github.com> Thu Jun 24 12:57:55 2021 -0700
tree 23543b6fdfb11076b6db2393cb27701d1bec3dcc
parent 11f1a30cdb59f9da0209798d2057f7afacbd9547

[3.10] bpo-44498: Issue a deprecation warning on asynchat, asyncore and smtpd import (GH-26882) (GH-26904)



* Issue a deprecation warning on smtpd import

* Also issue DeprecationWarnings for asynchat and asyncore

* Fix some tests

* test___all__ requires the word 'module' or 'package' in the deprecation
  warning text, so add those to smtpd, asynchat, and asyncore.
* In test_support, use pprint now instead of asyncore as the landmark.

* Add What's New

* Use ..deprecated::

* Use ..deprecated::

* Update Lib/smtpd.py

Co-authored-by: Miro Hrončok <miro@hroncok.cz>

* Update Doc/library/smtpd.rst

Co-authored-by: Miro Hrončok <miro@hroncok.cz>

* Import async{hat,ore} after the DeprecationWarning for this module

Co-authored-by: Miro Hrončok <miro@hroncok.cz>
(cherry picked from commit 8488b85c6397fe58f17fc00e047044c959ac0b04)


Co-authored-by: Barry Warsaw <barry@python.org>

Automerge-Triggered-By: GH:warsaw

Lib/asynchat.py

diff --git a/Lib/asynchat.py b/Lib/asynchat.py
index f4ba361..de26ffa 100644
--- a/Lib/asynchat.py
+++ b/Lib/asynchat.py
@@ -48,6 +48,14 @@
 import asyncore
 from collections import deque
 
+from warnings import warn
+warn(
+    'The asynchat module is deprecated. '
+    'The recommended replacement is asyncio',
+    DeprecationWarning,
+    stacklevel=2)
+
+
 
 class async_chat(asyncore.dispatcher):
     """This is an abstract class.  You must derive from this class, and add