invMatrix.py

import numpy as np

matrix1 = np.array([[3, 4], 
                   [1, 1]])
matrix1_inv = np.linalg.inv(matrix1)
print(matrix1_inv)
print(np.dot(matrix1,matrix1_inv))

matrix2 = np.array([[1, 1, 2], 
                   [3, -1, 2],
                   [2, 1, 1]])
matrix2_inv = np.linalg.inv(matrix2)
print(matrix2_inv)
print(np.dot(matrix2,matrix2_inv))