inverse of izip

Steven Bethard steven.bethard at gmail.com
Thu Aug 19 08:07:50 CEST 2004


So I know that zip(*) is the inverse of zip(), e.g.:

>>> zip(*zip(range(10), range(10)))
[(0, 1, 2, 3, 4, 5, 6, 7, 8, 9), (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)]

What's the inverse of izip?  Of course, I could use zip(*) or izip(*),
e.g.:

>>> zip(*itertools.izip(range(10), range(10)))
[(0, 1, 2, 3, 4, 5, 6, 7, 8, 9), (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)]
>>> x, y = itertools.izip(*itertools.izip(range(10), range(10)))
>>> x, y
((0, 1, 2, 3, 4, 5, 6, 7, 8, 9), (0, 1, 2, 3, 4, 5, 6, 7, 8, 9))

But then I get a pair of tuples, not a pair of iterators.  Basically,
I want to convert an iterator of tuples into a tuple of iterators.

Steve



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