Trastorno de la matriz

features = [[12, 23, 12, 23, 2, 12],
            [22, 23, 12, 23, 2, 12],
            [32, 23, 12, 23, 2, 12],
            [42, 23, 12, 23, 2, 12],
            [52, 23, 12, 23, 2, 12],
            [62, 23, 12, 23, 2, 12],
            [72, 23, 12, 23, 2, 12]]
features = np.array(features)
test_idx_reorder = [2, 5, 1, 3, 6, 4]

test_idx_range = np.sort(test_idx_reorder)
features[test_idx_reorder, :] = features[test_idx_range, :]
print(features)

resultado:

[[12 23 12 23  2 12]
 [42 23 12 23  2 12]
 [22 23 12 23  2 12]
 [52 23 12 23  2 12]
 [72 23 12 23  2 12]
 [32 23 12 23  2 12]
 [62 23 12 23  2 12]]