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Message: [QUOTE="Steven Bethard, post: 1789242"] Just the same[1] =) .... def __getattr__(self, name): .... d = {} .... setattr(self, name, d) .... return d .... def __repr__(self): .... items = self.__dict__.items() .... items.sort() .... return '\n'.join(['%s -> %r' % item for item in items]) .... a -> {1: 99} b -> {2: 42, 3: 11} I believe that __getattr__ works just the same (but to check for yourself, see [URL]http://docs.python.org/ref/attribute-access.html[/URL]). I think what you're thinking of is __getattribute__ which new-style classes offer *in addition* to __getattr__. While __getattr__ is called only if an attribute is not found, __getattribute__ is called unconditionally for every attribute access. Steve [1] modulo my preference for list comprehensions/generator expressions instead of map [/QUOTE]