Combine nested for loops in python

Question

Suppose I have a nested loop of the form:

for i in List1:
    for j in List2:
        DoSomething(i,j)

Can it be done as follows:

for i,j in combine(List1, List2):
    DoSomething(i,j)

Thanks in advance

So to clarify the combine function would do something as follows:

List1 = range(5)
List2 = range(5)
combine(List1, List2,)
>>> (0,0)
>>> (0,1)
>>> (0,2)
.
.
.
>>> (2,4)
>>> (3,0)
.
.
.

The itertools.product works perfectly

what is you actual problem you are trying to solve? Yes you can combine lists, but the nested loop works like a 2 dimensional array. How would like the combine function to behave? Please update your post to narrow your question. — Jeroen
– Jeroen, Commented Apr 19, 2017 at 14:51
I would say he wants to DoSomething in a nested-loop without explicitly nesting loops. IMO the question is not very verbose, but clear in this extent. And the perfect answer has already been given: stackoverflow.com/a/43498876/6525140 — Michael Hoff
– Michael Hoff, Commented Apr 19, 2017 at 22:42

Cory Kramer · Accepted Answer · 2017-04-19 14:38:31Z

5

You can use itertools.product

import itertools
for i,j in itertools.product(List1, List2):
    DoSomething(i,j)

answered Apr 19, 2017 at 14:38

Cory Kramer

119k19 gold badges176 silver badges233 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1