How to to read a matrix from a given file?

Question

I have a text file which contains matrix of N * M dimensions.

For example the input.txt file contains the following:

Answer 1

You can simply use numpy.loadtxt. Easy to use, and you can also specify your delimiter, datatypes etc.

specifically, all you need to do is this:

import numpy as np
input = np.loadtxt("input.txt", dtype='i', delimiter=',')
print(input)

And the output would be:

[[0 0 0 0 0 0 0 0 0 0]
 [0 0 0 0 0 0 0 0 0 0]
 [0 0 0 0 0 0 0 0 0 0]
 [0 0 0 0 0 0 0 0 0 0]
 [0 0 0 0 0 0 0 0 0 0]
 [0 0 0 0 0 0 0 0 0 0]
 [0 0 2 1 0 2 0 0 0 0]
 [0 0 2 1 1 2 2 0 0 1]
 [0 0 1 2 2 1 1 0 0 2]
 [1 0 1 1 1 2 1 0 2 1]]