Lists aggregation

[bearophileHUGS at lycos.com]

mattia:
> Now, some ideas (apart from the double loop to aggregate each element of
> l1 with each element of l2):

>>> from itertools import product
>>> list(product([1,2,3], [4,5]))
[(1, 4), (1, 5), (2, 4), (2, 5), (3, 4), (3, 5)]

Bye,
bearophile