gh-91217: deprecate telnetlib (GH-91958)

Doc/whatsnew/3.11.rst

@@ -1069,6 +1069,7 @@ Deprecated
   * :mod:`sndhdr`
   * :mod:`spwd`
   * :mod:`sunau`
+  * :mod:`telnetlib`
 
   (Contributed by Brett Cannon in :issue:`47061`.)
 

Lib/telnetlib.py

@@ -37,6 +37,9 @@ import sys
 import socket
 import selectors
 from time import monotonic as _time
+import warnings
+
+warnings._deprecated(__name__, remove=(3, 13))
 
 __all__ = ["Telnet"]
 

Lib/test/test_telnetlib.py

@@ -1,15 +1,16 @@
 import socket
 import selectors
-import telnetlib
 import threading
 import contextlib
 
 from test import support
-from test.support import socket_helper
+from test.support import socket_helper, warnings_helper
 import unittest
 
 support.requires_working_socket(module=True)
 
+telnetlib = warnings_helper.import_deprecated('telnetlib')
+
 HOST = socket_helper.HOST
 
 def server(evt, serv):

Misc/NEWS.d/next/Library/2022-04-17-12-41-52.gh-issue-91217.3wnHSX.rst

@@ -0,0 +1 @@
+Deprecate the telnetlib module.