如何仅过滤排列中的唯一对，python？

Question

from itertools import permutations
list0 = [1, 2, 3]
for el1, el2 in permutations(list0, r=2):
    print(el1, el2)

Output:

1 2
1 3
2 1
2 3
3 1
3 2

This output contains all possible permutations, I need unique combinations of numbers, how should I filter them, maybe I should use another code. I need

1 2
1 3
2 3

Answer 1

You can use combinations instead of permutations to achieve that

from itertools import combinations
list0 = [1, 2, 3]
for combination in combinations(list0, 2):
    print(combination)

Answer 2

Are you probably looking for combinations