numpy move columns

1>>> import numpy as np
2>>> a = np.array([[10, 20, 30, 40, 50],
3...               [ 6,  7,  8,  9, 10]])
4>>> permutation = [0, 4, 1, 3, 2]
5>>> idx = np.empty_like(permutation)
6>>> idx[permutation] = np.arange(len(permutation))
7>>> a[:, idx]  # return a rearranged copy
8array([[10, 30, 50, 40, 20],
9       [ 6,  8, 10,  9,  7]])
10>>> a[:] = a[:, idx]  # in-place modification of a