Numpy slice from beginning and from end

Question

array = numpy.array([1,2,3,4,5,6,7,8,9,10])
array[-1:3:1]
>> []

I want this array indexing to return something like this:

[10,1,2,3]

Answer 1

np.roll lets you wrap an array which might be useful

import numpy as np

a = np.array([1,2,3,4,5,6,7,8,9,10])

b = np.roll(a,1)[0:4]

results in

>>> b
array([10  1  2  3])

Answer 2

Use np.roll to:

Roll array elements along a given axis. Elements that roll beyond the last position are re-introduced at the first.

>>> np.roll(x, 1)[:4]
array([10,  1,  2,  3])