字母列表的组合

Question

What is the fastest way to get a list of the combinations of a list of lists of letters? I understand that if the list is full of numbers, I can just do this:

randomList = [[1,2,3],[4,5,6],[7,8,9]]
for el in itertools.product(*randomList):
        print(el)

This would print [1,4,7],[1,4,8]...[3,6,8],[3,6,9] But when I try this with letters, the function just doesn't work. Is there anyway for this to work with letters, or is there another approach to this. I would prefer not to have a function defined. In short, need something that gives all combinations of randomList = [[A,B,C],[D,E,F],[G,H,I]]

[EDIT]-Thanks to the people who answered, I didn't realize that it was registering as variables instead of strings

Answer 1

It wont work maybe because the randomList you have defined doesnt have alphabets but variables listed as A, B, ...

randomList = [['A','B','C'],['D','E','F'],['G','H','I']]

Try this.

Answer 2

It works, I think you have not given the single quotes for the letters.

import itertools

randomList = [[1,2,3],[4,5,6],[7,8,9]]
randomList = [['A','B','C'],['D','E','F'],['G','H','I']]
for el in itertools.product(*randomList):
        print(el)