`numpy:fliplr`

Signature

def fliplr(m)

Reverse the order of elements along axis 1 (left/right).

For a 2-D array, this flips the entries in each row in the left/right direction. Columns are preserved, but appear in a different order than before.

f : ndarray: A view of m with the columns reversed. Since a view is returned, this operation is $O (1)$ .

Equivalent to m[:,::-1] or np.flip(m, axis=1). Requires the array to be at least 2-D.

import numpy as np
A = np.diag([1.,2.,3.])

✓

A
np.fliplr(A)

✗

array([[0., 0., 1.],
       [0., 2., 0.],
       [3., 0., 0.]])

rng = np.random.default_rng()
A = rng.normal(size=(2,3,5))

✓

np.all(np.fliplr(A) == A[:,::-1,...])

✗

np.True_