Enumerate two python lists simultaneously?

Question

How do I enumerate two lists of equal length simultaneously? I am sure there must be a more pythonic way to do the following:

for index, value1 in enumerate(         


        

Answer 1

for i, (x, y) in enumerate(zip(data1, data2)):

In Python 2.x, you might want to use itertools.izip instead of zip, esp. for very long lists.