Issue #18200: Update the stdlib (except tests) to use
ModuleNotFoundError.
diff --git a/Lib/socket.py b/Lib/socket.py
index 96f8ed0..db28b4b 100644
--- a/Lib/socket.py
+++ b/Lib/socket.py
@@ -51,7 +51,7 @@
 
 try:
     import errno
-except ImportError:
+except ModuleNotFoundError:
     errno = None
 EBADF = getattr(errno, 'EBADF', 9)
 EAGAIN = getattr(errno, 'EAGAIN', 11)