I have two lists of lists that have equivalent numbers of items. The two lists look like this:
L1 = [[1, 2], [3, 4], [5, 6]] L2 =[[a, b], [c, d], [e, f]] >
>>> map(list.__add__, L1, L2) [[1, 2, 'a', 'b'], [3, 4, 'c', 'd'], [5, 6, 'e', 'f']]