Using list comprehension in Python to do something similar to zip()?

Question

I\'m a Python newbie and one of the things I am trying to do is wrap my head around list comprehension. I can see that it\'s a pretty powerful feature that\'s worth learning.

Answer 1

This takes zip's output and converts all tuples to lists:

map(list, zip(cities, airports))

As for the performance of each:

$ python -m timeit -c '[ [a, b] for a, b in zip(xrange(100), xrange(100)) ]'
10000 loops, best of 3: 68.3 usec per loop

$ python -m timeit -c 'map(list, zip(xrange(100), xrange(100)))'
10000 loops, best of 3: 75.4 usec per loop

$ python -m timeit -c '[ list(x) for x in zip(range(100), range(100)) ]'
10000 loops, best of 3: 99.9 usec per loop