How to convert 2D string list to 2D int list python? [duplicate]

Answer 1

Python has a function called int() that will make strings into integers. Try that out.

Answer 2

Python 3.x

print ( [list( map(int,i) ) for i in l] )

Output :

[[1, 1, 3], [2, 3, 5], [3], [4, 5], [5, 1], [6, 6], [7]]

Answer 3

Do with list comprehension,

In [24]: l =  [['1', ' 1', ' 3'], ['2', ' 3', ' 5'], ['3'], ['4', ' 5'], ['5', ' 1'], ['6', ' 6'], ['7']]

In [25]: result = [map(int,i) for i in l]

Result

In [26]: print result
[[1, 1, 3], [2, 3, 5], [3], [4, 5], [5, 1], [6, 6], [7]]