shape[0]:为矩阵的行数
shape[1]:为矩阵的列数
import numpy as np
k = np.matrix([[1,2,3],
[4,5,6],
[7,8,9]
[10,11,12])
print(np.shape(k)) # 输出(4,3)表示矩阵为3行4列
print(k.shape[0]) # shape[0]输出4,为矩阵的行数
print(k.shape[1]) # 同理shape[1]输出3,为矩阵的列数

![python中shape[0]、shape[1] python中shape[0]、shape[1]](http://www.mshxw.com/aiimages/31/926037.png)
