iterating over a list as if it were a circular list

[Chris Rebert]

On Mar 7, 2013 1:24 AM, "Sven" <svenito at gmail.com> wrote:
>
> I was wondering what the best approach for the following might be.
>
> Say you have a list P of points and another list N of other items. You
can always assume that
>
> len(N) <= len(P)
>
> Now I would like to iterate over P and place one N at each point. However
if you run out of N I'd like to restart from N[0] and carry on until all
the points have been populated.

Untested due to the late hour:

import itertools

for p, n in itertools.izip(P, itertools.cycle(N)):
    # do whatever
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