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[Python-Dev] iter.index()

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Hi,

I wanted to do something like

    i = itertools.chain(list1, list2).index(elem)

but that gave me 

    ...
    AttributeError: 'itertools.chain' object has no attribute 'index'

If I use the operator module it works just fine.

    i = operator.indexOf(itertools.chain(list1, list2), elem)

Why not add the index method to iterator objects?  Of course, internally
only next() is used by the default implementation.

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