Python: Iterating through a list and returning a tuple permutation for all strings in the list?

Question

I have a list of elements: list = ['A','B',C']. How do I iterate through this list and return the following: [AB, AC, BC]?

note: I only want unique pairs, not [AA, BB, CC...] or [AB, BA, BC, CB...]

Answer 1

You need itertools.combinations:

In [1]: from itertools import combinations

In [2]: for c in combinations(['A', 'B', 'C'], 2):
   ...:     print(c)
   ...: 
('A', 'B')
('A', 'C')
('B', 'C')