This lambda function zips two lists into a single one:
zipped = lambda L1, L2: [L[i]
for i in range(min(len(L1), len(L2)))
for L in (L1, L2)]
Example:
>>> f = [x for x in range(5)]
>>> g = [x*10 for x in range(5)]
>>> zipped(f, g)
[0, 0, 1, 10, 2, 20, 3, 30, 4, 40]