Question

Let’s say I have two or more lists of same length. What’s a good way to iterate through them?

a, b are the lists.

 for i, ele in enumerate(a):
    print ele, b[i]

or

for i in range(len(a)):
   print a[i], b[i]

or is there any variant I am missing?

Is there any particular advantages of using one over other?

Answer 1

The usual way is to use zip():

for x, y in zip(a, b):
    # x is from a, y is from b

This will stop when the shorter of the two iterables a and b is exhausted. Also worth noting: itertools.izip() (Python 2 only) and itertools.izip_longest() (itertools.zip_longest() in Python 3).