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iterating over a list as if it were a circular list

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  iterating over a list as if it were a circular list Sven <svenito@gmail.com> - 2013-03-07 09:23 +0000
    Re: iterating over a list as if it were a circular list Roy Smith <roy@panix.com> - 2013-03-07 08:37 -0500

#40726 — iterating over a list as if it were a circular list

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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.
So far I've got

for point in points:


-- 
./Sven

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#40763

In article <mailman.2993.1362648214.2939.python-list@python.org>,
 Sven <svenito@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.
> So far I've got
> 
> for point in points:

I'm not completely following what you're trying to do, but I think what 
you're looking for is some combination of zip() and itertools.cycle().

pairs = zip(P, cycle(N))

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