从基于索引的numpy数组中获取子数组 [英] Get a subarray from a numpy array based on index

问题描述

我有一个numpy数组向量，我想基于索引获取一个子集:

I have a numpy array vector, and I want to get a subset based on the indexes:

import numpy as np
input=np.array([1,2,3,4,5,6,7,8,9,10])
index=np.array([0,1,0,0,0,0,1,0,0,1])

什么是python输出输出= [2,7,10]的方法?

what is a pythonic way to get out output=[2,7,10]?

推荐答案

output = input[index.astype(np.bool)]

或

output = input[np.where(index)[0]]

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