python numpy.array插入一行或一列

numpy.array插入一行或一列

import numpy as np
a = np.array([[1,2,3],[4,5,6],[7,8,9]])
b = np.array([[0,0,0]])
c = np.insert(a, 0, values=b, axis=0)
d = np.insert(a, 0, values=b, axis=1)
print(c)
print(d)

结果：

>>c
[[0 0 0]
[1 2 3]
[4 5 6]
[7 8 9]]


>>d
[[0 1 2 3]
[0 4 5 6]
[0 7 8 9]]
 

场景：df的字段名和数据添加到excel表