I have a list of n letters as strings such as:
input: ["A", "B", "C", "D"]
What I need to do is create all possible combinations of these letters with given length, for example if:
L = 2
output: ["A", "B"], ["A", "C"], ["A", "D"], ["B", "C"], ["B", "D"], ["C", "D"]
L = 3
output: ["A", "B", "C"], ["A", "B", "D"], ["A", "C", "D"], ["B", "C", "D"]
You can use itertools.permutations to get permutations of a specified length.
from itertools import permutations
print(list(permutations(my_list, L)))