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I don't think it is a bug.
The posted code completely breaks the expected behavior of __getattribute__. With a such implementation, there is nothing we can do with this object as we cannot introspect it.
Use the following if you really need this kind of behaviour:
class E(dict):
 def __getattribute__(self,name):
 try:
 return self[name]
 except KeyError:
 return dict.__getattribute__(self, name)