Sorry if this is a repost -- it didn't appear for me the first time.
So I was looking at the Language Reference's discussion about emulating container types[1], and nowhere in it does it mention that .keys() is part of the container protocol. Because of this, I would assume that to use UserDict.DictMixin correctly, a class would only need to define __getitem__, __setitem__, __delitem__ and __iter__. So why does UserDict.DictMixin require keys() to be defined?
Because it's a DictMixin, not a ContainerMixin?
.keys() is definitely part of the standard dictionary interface, and not something the mixin can derive from the generic container methods.
Cheers, Nick.
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Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia
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