kj <no.email at please.post> writes: > Is there a sequence-oriented equivalent to the sum built-in? E.g.: > seq_sum(((1, 2), (5, 6))) --> (1, 2) + (5, 6) --> (1, 2, 5, 6) use itertools.chain for this. A few people have mentioned that sum will also work, but I think for that purpose it could have O(n**2) complexity.