# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import numpy as np
A = np.mat('11 12 13 14; 20 21 22 15; 19 18 17 16')
print(A)
#B = np.linalg.inv(A)
B = np.linalg.pinv(A)
print(B)
print(A * B)
print(A.I)
