请写出执行下面代码的运行结果:

Question

import numpy as np
x= np.array([[1.0,2.0],[3.0,4.0]]) y= np.array([[5.0,6.0],[7.0,8.0]]) print (x. shape, y.shape)
z =np.concatenate((x,y),axis =0) z1 = np.concatenate((x,y), axis = 1) print(z,'\n’,z1,’\n' , z. shape, z1. shape) z[0,:]=np.pi print (z)
z1[0:2,0:2]=0 print(z1)

Answer 1