Issue #18200: Update the stdlib (except tests) to use
ModuleNotFoundError.
diff --git a/Lib/xmlrpc/client.py b/Lib/xmlrpc/client.py
index ff42265..55546e4 100644
--- a/Lib/xmlrpc/client.py
+++ b/Lib/xmlrpc/client.py
@@ -139,7 +139,7 @@
 from io import BytesIO
 try:
     import gzip
-except ImportError:
+except ModuleNotFoundError:
     gzip = None #python can be built without zlib/gzip support
 
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