default behavior

Christian Heimes lists at
Wed Aug 4 02:16:32 CEST 2010

> Perhaps punctuation will help clarify my intent:
> __missing__ is *not* part of (dict)s, as shown by dir(dict()):

Indeed, that's correct. Can we agree, that __missing__ is an optional
feature of the dict interface, that can be implemented in subclasses of


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