How to change elements from dictionary using split()?

I have the following dictionary:

things = { 0: ["32 64 43 12 67", "14 35 61 46 89"] 1: ["23 54 11 59 90", "56 6 91 11 19"] }

I want to iterate through the numbers and in order to do that I need to transform them into integers. I tried splitting the strings using

for z in range(len(things)):
 for c in things[z]:
    c = c.split(" ")

but it doesn’t change anything

>Solution :

You can transform your input to the required output using nested comprehensions.

output = {k: [[int(x) for x in s.split()] for s in v] for k, v in things.items()}