2.29

import numpy as np
a = np.arange(16).reshape(4, 4)
b = np.vsplit(a, 2)
print('行分割: \n', b[0], '\n', b[1])
c = np.hsplit(a, 4)
print('列分割：: \n', c[0], '\n', c[1], '\n', c[2], '\n', c[3])