What I'd need is to create combinations for two elements a time. If a list contains: seq = ['A', 'B', 'C'] the output would be com = [['A', 'B'], ['A', 'C'], ['B', 'C']] all this without itertools.combinations method. I used the following code for the permutations. But how could I modify it to make it work with the combinations? def permute(seq): if len(seq) <= 1: perms = [seq] else: perms = [] for i in range(len(seq)): sub = permute(seq[:i]+seq[i+1:]) for p in sub: perms.append(seq[i:i+1]+p) return perms Continue reading...
