TrustyDistortedExecutable created by acwoss - https://repl.it/@acwoss/TrustyDistortedExecutable

main.py

import numpy

dimensions = input('Dimensões da matriz NxM: ').split()
N, M = [int(value) for value in dimensions]

matrix = []

for i in range(N):
    row = input(f'Linha {i+1}: ').split()

    if len(row) != M:
        raise Exception(f'Você precisa informar {M} valores por linha')

    numbers = [int(number) for number in row]
    matrix.append(numbers)

matrix = numpy.matrix(matrix)

print(matrix)