add patch

Author: ynir3

Lib/test/test_smtplib.py

@@ -23,7 +23,7 @@
 from test.support import threading_helper
 from test.support import asyncore
 from test.support import smtpd
-from unittest.mock import Mock
+from unittest.mock import Mock, patch
 
 
 support.requires_working_socket(module=True)