Converting elements of list into integers

Asked Nov 09 '18 at 18:33

Active Nov 09 '18 at 18:34

Viewed 30 times

I want to take a list that contains smaller lists which contain strings, to convert the strings inside the smaller lists into integers. For example:

lst=[["1","2"],["3","4"]]

and return

[[1,2],[3,4]].

This is what I have but it returns the exact same list. I'm not sure where to go from here.

 a=0
 for i in lst:
    while a<len(i):
        for j in lst[a]:
            j=int(j)
        a=a+1
 print(lst)

edited Nov 09 '18 at 18:34

dawg

asked Nov 09 '18 at 18:33

Cam

Well you never *change* the list itself, you only construct an `int(j)`, and assign that to `j`. – Willem Van Onsem Nov 09 '18 at 18:34
4

You can do this with `[[int(j) for j in row] for row in lst]`. – Willem Van Onsem Nov 09 '18 at 18:34

0 Answers0