--- a/eric6/Graphics/ClassItem.py	Sat Apr 10 18:31:17 2021 +0200
+++ b/eric6/Graphics/ClassItem.py	Sat Apr 10 18:38:27 2021 +0200
@@ -29,7 +29,7 @@
         @param attributes list of attribute names of the class
             (list of strings)
         """
-        super(ClassModel, self).__init__(name)
+        super().__init__(name)
         
         self.methods = [] if methods is None else methods[:]
         self.attributes = [] if attributes is None else attributes[:]