>>> import numpy as np
>>> a = np.arange(60).reshape([3,4,5])
>>> a
array([[[ 0, 1, 2, 3, 4],
[ 5, 6, 7, 8, 9],
[10, 11, 12, 13, 14],
[15, 16, 17, 18, 19]],
[[20, 21, 22, 23, 24],
[25, 26, 27, 28, 29],
[30, 31, 32, 33, 34],
[35, 36, 37, 38, 39]],
[[40, 41, 42, 43, 44],
[45, 46, 47, 48, 49],
[50, 51, 52, 53, 54],
[55, 56, 57, 58, 59]]])
>>> a[...,::-1]
array([[[ 4, 3, 2, 1, 0],
[ 9, 8, 7, 6, 5],
[14, 13, 12, 11, 10],
[19, 18, 17, 16, 15]],
[[24, 23, 22, 21, 20],
[29, 28, 27, 26, 25],
[34, 33, 32, 31, 30],
[39, 38, 37, 36, 35]],
[[44, 43, 42, 41, 40],
[49, 48, 47, 46, 45],
[54, 53, 52, 51, 50],
[59, 58, 57, 56, 55]]])