Matrix in list formate

Question

How to represent matrix in list formate

Answer 1

With lists in lists:

m = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

You can reformat for easier reading:

m = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]
]