Interleave multiple lists of the same length in Python

Question

In Python, is there a good way to interleave two lists of the same length?

Say I\'m given [1,2,3] and [10,20,30]. I\'d like to transform th

Answer 1

[el for el in itertools.chain(*itertools.izip_longest([1,2,3], [4,5])) if el is not None]

As long as you don't have None that you want to keep