Add missing sys import to socket_helper.py (GH-19791)

diff --git a/Lib/test/support/socket_helper.py b/Lib/test/support/socket_helper.py
index b09c248cfccdfa98ee89c40bab2428261ddc7877..0ac844556292634c2bf2de507a3e642624912656 100644 (file)
--- a/Lib/test/support/socket_helper.py
+++ b/Lib/test/support/socket_helper.py
@@ -2,6 +2,7 @@ import contextlib
 import errno
 import socket
 import unittest
+import sys
 
 from .. import support