Pairwise circular Python 'for' loop

Question

Is there a nice Pythonic way to loop over a list, retuning a pair of elements? The last element should be paired with the first.

So for instance, if I have the list

Answer 1

this seems like combinations would do the job.

from itertools import combinations
x=combinations([1,2,3],2)

this would yield a generator. this can then be iterated over as such

for i in x:
  print i

the results would look something like

(1, 2)
(1, 3)
(2, 3)