--- a/eric6/Utilities/ClassBrowsers/pyclbr.py	Thu Apr 08 17:27:12 2021 +0200
+++ b/eric6/Utilities/ClassBrowsers/pyclbr.py	Thu Apr 08 18:27:47 2021 +0200
@@ -705,7 +705,7 @@
     if '__all__' in dictionary:
         # set visibility of all top level elements
         pubs = dictionary['__all__']
-        for key in dictionary.keys():
+        for key in dictionary:
             if key == '__all__' or key.startswith("@@"):
                 continue
             if key in pubs.identifiers: