How to turn a string into a multidimensional array?

Question

Python

There is a line

1 2 3
2 3 4
3 4 5
4 5 6

How to turn it into a multidimensional array of the form

Answer 1

s is your multiline string
then
a = [x.split( ' ') for x in s.split('\n')]

Answer 2

Split first by the newline character (\n), then split each piece by space. Google the .split() and .splitlines()
line methods . Well, convert to int or float at the end.