Python: How to get values of an array at certain index positions?

Question

I have a numpy array like this:

a = [0,88,26,3,48,85,65,16,97,83,91]

How can I get the values at certain index positions in ONE step? For e

Answer 1

You can use index arrays, simply pass your ind_pos as an index argument as below:

a = np.array([0,88,26,3,48,85,65,16,97,83,91])
ind_pos = np.array([1,5,7])

print(a[ind_pos])
# [88,85,16]

Index arrays do not necessarily have to be numpy arrays, they can be also be lists or any sequence-like object (though not tuples).