Python multiple for loops

Question

I am wondering if the 3 for loops in the following code can be written in a better way:

   Nc = 10     # number of points for (0, pi)
   cc1 = linspace(0,pi,Nc)
   cc2 = linspace(0,pi/2,Nc/2)
   cc3 = linspace(0,pi/2,Nc/2)
   for c1 in cc1:
       for c2 in cc2:
           for c3 in cc3:
               print c1,c2,c3

possible duplicate of [Nested for loops in Python](http://stackoverflow.com/questions/7164162/nested-for-loops-in-python) — BrenBarn, Aug 20 '12 at 04:12
it is not a duplicate. The answer based on `numpy.meshgrid()` or similar is not appropriate for the other question. — jfs, Aug 20 '12 at 04:21
related: [itertools product speed up](http://stackoverflow.com/q/4709510/4279) — jfs, Aug 20 '12 at 04:44
Better in what way? Faster? More memory efficient? Prettier? — bchurchill, Aug 20 '12 at 05:48

score 28 · Accepted Answer · answered Aug 20 '12 at 04:13

28

import itertools

for a,b,c in itertools.product(cc1, cc2, cc3):
    print a,b,c

answered Aug 20 '12 at 04:13

Amber

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Should be : print( (a,b,c) – Camilo Sep 14 '21 at 23:46
This is Python 2. – Glatinis Jun 17 '22 at 19:06

score 7 · Answer 2 · answered Aug 20 '12 at 04:13

7

try this :)

[(c1, c2, c3) for c1 in cc1 for c2 in cc2 for c3 in cc3]

answered Aug 20 '12 at 04:13

blueiur

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Python multiple for loops

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