How to convert a matrix of strings into a matrix of integers using comprehensions

Question

I have a matrix [[\'1\', \'2\'], [\'3\', \'4\']] which I want to convert to a matrix of integers. Is there is a way to do it using comprehensions?

Answer 1

In the general case:

int_matrix = [[int(column) for column in row] for row in matrix]

Answer 2

   [map(int, thing) for thing in matrix]

Answer 3

You could do it like:

>>> test = [['1', '2'], ['3', '4']]
>>> [[int(itemInner) for itemInner in itemOuter] for itemOuter in test]
[[1, 2], [3, 4]]

As long as all the items are integer, the code could work.

Hope it be helpful!

Answer 4

[ [int(a), int(b)] for a, b in matrix ]