Py2.3: Feedback on Sets

[Skip Montanaro]

    Gary> I get what you mean, but let me point out that "iterable" does not
    Gary> appear in the index of either the Language Reference or Library
    Gary> Reference, nor do I see it in the introduction.  

That's a documentation bug then.  The concrete notion of an "iterable"
arrived on the Python scene relatively recently, and the docs apparently
haven't quite caught up in that respect.

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