Issue #18200: Update the stdlib (except tests) to use
ModuleNotFoundError.
diff --git a/Lib/optparse.py b/Lib/optparse.py
index 37764d3..3812258 100644
--- a/Lib/optparse.py
+++ b/Lib/optparse.py
@@ -87,7 +87,7 @@
 
 try:
     from gettext import gettext, ngettext
-except ImportError:
+except ModuleNotFoundError:
     def gettext(message):
         return message