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?

Have you tried anything?? Here is a link which might be helpful http://stackoverflow.com/questions/20639180/python-list-comprehension-explained — Narendra, Apr 24 '14 at 03:05

score 2 · Answer 1 · answered Apr 24 '14 at 02:38

2

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

answered Apr 24 '14 at 02:38

user590028

score 2 · Answer 2 · answered Apr 24 '14 at 02:38

2

In the general case:

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

answered Apr 24 '14 at 02:38

aruisdante

score 1 · Answer 3 · answered Apr 24 '14 at 02:38

1

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!

answered Apr 24 '14 at 02:38

Sheng

score 0 · Answer 4 · answered Apr 24 '14 at 03:15

0

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

answered Apr 24 '14 at 03:15

wwii

4 Answers4