Fast matrix transposition in Python

Question

Is there any fast method to make a transposition of a rectangular 2D matrix in Python (non-involving any library import).?

Say, if I have an array

Answer 1

>>> X = [1,2,3], [4,5,6]]
>>> zip(*X)
[(1,4), (2,5), (3,6)]
>>> [list(tup) for tup in zip(*X)]
[[1,4], [2,5], [3,6]]

If the inner pairs absolutely need to be lists, go with the second.