Question

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How to generate all permutations of a list in Python

I want to find all the permutations of a the elements in a list.
but then with some conditions imposed.. umm..
Probably an example will help me explain better.

I have four lists

["1"],["0"],["a","b","c],["d","e","f"]

Now I want to have the permutations in following way:

 "10ad" ,"10bd","10cd","10ae", "10be"
 ,"10bf"..

and so on..

So basically every element (with every element)??
Now I know the very naive way to do this.
But what is the pythonic way to do this?
if there is any??
Any suggestions

Thanks

Answer 1

I think you want to use the itertools module, which is part of the standard Python distribution.

For example:

import itertools

a = ["1"]
b = ["0"]
c = ["a","b","c"]
d = ["d","e","f"]

for item in itertools.product(a, b, c, d): 
    print(item)

Edit: To be clear, the itertools.product function provides all combinations for all items in the inputted lists, not permutations. But based on OP’s wording, I think this is what he/she actually wants.