patch

--- o.py    2021-02-22 16:27:39.639010000 +0100
+++ werror.py   2021-02-22 16:27:18.388751000 +0100
@@ -56,5 +56,5 @@

     set_warning('shadow')

-if __name__ == '__main__':
+#if __name__ == '__main__':
     main()