extending the built in dictionary type

[Robin Becker]

I'm interested in extending the built in dictionary. It's fairly simple
to wrap, but seems incredibly hard to chain the methods. Is there any
obvious way to use most of the built in methods whilst modifying a few.

Seems that although it exists I can't chain the original mapp_methods of
dictobject as that is not visible outside pythonxx.dll. So is there an
easier way to get at these internal types?
-- 
Robin Becker