Geoffrey Gerrietts discovered that a KeyError was caught that probably

gvanrossum · gvanrossum · commit e13be40b8896 · 2001-01-15T16:53:58.000Z
should have been a NameError.  I'm checking in a change that catches
both, just to be sure -- I can't be bothered trying to understand this
code any more. :-)
diff --git a/Demo/metaclasses/Meta.py b/Demo/metaclasses/Meta.py
@@ -30,7 +30,7 @@ def __getattr__(self, name):
         except AttributeError:
             try:
                 ga = self.__formalclass__.__getattr__('__usergetattr__')
-            except KeyError:
+            except (KeyError, AttributeError):
                 raise AttributeError, name
             return ga(self, name)
         if type(raw) != types.FunctionType:
