[numpy]这个什么意思

[110male]

import numpy as np

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

An example of integer array indexing.

The returned array will have shape (3,) and

print a[[0, 1, 2], [0, 1, 0]] # Prints "[1 4 5]" 这什么意思，我怎么不懂 给解释一下

[110male]

a = np.array([[1,2], [3, 4], [5, 6]])
print a[[0, 1, 2], [0, 1, 0]]

结果是： "[1 4 5]"
什么意思？

[z0z]

import numpy as np
a = np.array([[1,2],[3,4],[5,6]])
print(a[[0,1,2]])
print("=========")
print(a[[0,1,0]])
print("=========")
print(a[[0,1,2],[0,1,0]])





[[1 2]
[3 4]
[5 6]]
=========
[[1 2]
[3 4]
[1 2]]
=========
[1 4 5]

Process finished with exit code 0

[ProkillerJ]

a[[x1, x2, x3], [y1, y2, y3]] 相当于[a[x1,y1],a[x2,y2],a[x3,y3]]