Generate all possible lists from the sublist in python

Question

Suppose I have list [['a', 'b', 'c'], ['d', 'e'], ['1', '2']]

I want to generate list where on the first place is any value from first sublist, on the second - from second etc.

So, a couple of examples:

['a', 'd', '1']
['b', 'd', '1']
['c', 'd', '1']
['a', 'e', '1']
['a', 'e', '2']
['b', 'e', '1']
['b', 'e', '2']

etc.

Why not just generate a random number (index) for each of the sublists and appending that character to a new list? — rishran, Nov 28 '16 at 21:28

score 2 · Answer 1 · answered Nov 28 '16 at 21:29

You need itertools.product() which return cartesian product of inpur iterables:

>>> from itertools import product
>>> my_list = [['a', 'b', 'c'], ['d', 'e'], ['1', '2']]

#                v Unwraps the list
>>> list(product(*my_list))
[('a', 'd', '1'), 
 ('a', 'd', '2'), 
 ('a', 'e', '1'), 
 ('a', 'e', '2'), 
 ('b', 'd', '1'), 
 ('b', 'd', '2'), 
 ('b', 'e', '1'), 
 ('b', 'e', '2'), 
 ('c', 'd', '1'), 
 ('c', 'd', '2'), 
 ('c', 'e', '1'), 
 ('c', 'e', '2')]

Generate all possible lists from the sublist in python

1 Answers1

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