numpy resize

import numpy as np

a = np.array([[1,2,3],[4,5,6]])

print(a)

print(a.shape)

[[1 2 3]
 [4 5 6]]

(2, 3)

b= np.resize(a,(3,3))

[[1 2 3]
 [4 5 6]
 [1 2 3]]

自动向右扩展(自动向右增加)

自动向下扩展(复制第一行)