How to permutate two lists in Python [duplicate]

Question

Here are two examples of lists

list = [["mo", "thu"], ["we", "fri"], ["mo", "mo"]]
list2 = [["mo", "fri", "fri"], ["we", "we"]]

So these lists come in random order. I've given two examples here. What I want to do is compute all possible ways these lists can be permutated. On the level where it's list[1] * list[2] * list[3]. All possible combinations. A smaller example what I would like to reach is this:

list3 = [["we", "thu"],["fri", "thu"]]

-->

[["we", "fri"], ["we", "thu"], ["thu", "fri"], ["thu", "thu"]]

Also, the lists are random so the amount of elements in the list or the nested lists can vary. I can python this out by alot of code but I was hoping there is an easier way to this.

Cheers

Based on your list3 example, I assume order doesn't matter? — tblznbits
– tblznbits, Commented Nov 17, 2015 at 12:49

Julien Spronck · Accepted Answer · 2015-11-17 13:04:11Z

8

What you want is unclear but maybe what you want is the cartesian product of your list? If so, it is very simple:

list3 = [["we", "thu"],["fri", "thu"]]
import itertools
final_list = [list(v) for v in itertools.product(*list3)]
## [['we', 'fri'], ['we', 'thu'], ['thu', 'fri'], ['thu', 'thu']]

answered Nov 17, 2015 at 13:04

Julien Spronck

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1 Comment

Jan Klaas Over a year ago

That's exactly what I wanted. Thanks alot!

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