Replace values in array of indexes corresponding to another array

Question

I have an array A of size [1, x] of values and an array B of size [1, y] (y > x) of indexes corresponding to array

Answer 1

Once you're using numpy.array you're able to do exactly what you want with syntax you expect:

>>> a = array([6, 7, 8])
>>> b = array([0, 2, 0, 0, 1])
>>> a[b]
array([6, 8, 6, 6, 7])