[docs] [issue23695] idiom for clustering a data series into n-length groups

[Ethan Furman]

Ethan Furman added the comment:

I think an example should suffice:

>>> s = [1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> n = 3
>>> zip(*[iter(s)]*n)
[(1, 2, 3), (4, 5, 6), (7, 8, 9)]

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nosy: +ethan.furman
versions:  -Python 3.2, Python 3.3

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<http://bugs.python.org/issue23695>
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