matDiff

import numpy as np

eps = 1e-9


def diff(a, b):
    if a.shape != b.shape:
        raise Exception("Incompatible Matrices!")
    c = abs(a - b)
    return c.max() > eps


if __name__ == "__main__":
    a = [[4, 3, 2], [1, 9, 8]]
    a = np.mat(a)
    b = [[12, 34, 19], [-9, 0, 1]]
    b = np.mat(b)

    if diff(a, b):
        print("OK!")
    else:
        print("NOT OK!")