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andrix/iunzip.py

Created July 4, 2011 13:33
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python iterable unzip
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iunzip.py
import itertools
from operator import itemgetter
def iunzip(iterable):
"""Iunzip is the same as zip(*iter) but returns iterators, instead of
expand the iterator. Mostly used for large sequence"""
_tmp, iterable = itertools.tee(iterable, 2)
iters = itertools.tee(iterable, len(_tmp.next()))
return (itertools.imap(itemgetter(i), it) for i, it in enumerate(iters))
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