Question

How would I use Numpy in python to search in arr2 with arr1 and return the string value.
arr1=[0,a],[1,b],[2,c]

arr2=[2],[1],[0]

Expected outcome is =[c],[b],[a]

Answer 1

import numpy as np
a1=np.array([[0,'a'],[1,'b'],[2,'c']])
a2=np.array(([[2],[1],[0]]))
a2=np.squeeze(a2) .....# to make use to search
out= a1[a2][:,1] ...#to get string
out

output:-

[c],[b],[a]

To get the desired result we need to squeeze the a2 to search in a2 with a1