让我用一个例子这样一个问题:如何使用二维布尔数组在numpy中以行为单位从一维数组中选择?
import numpy
matrix = numpy.identity(5, dtype=bool) #Using identity as a convenient way to create an array with the invariant that there will only be one True value per row, the solution should apply to any array with this invariant
base = numpy.arange(5,30,5) #This could be any 1-d array, provided its length is the same as the length of axis=1 of matrix from above
result = numpy.array([ base[line] for line in matrix ])
result
现在拥有了想要的结果,但我敢肯定有这样做避免了显式迭代特定numpy的法。它是什么?