t direction.
flip : Flip array in one or more dimensions.
rot90 : Rotate array counterclockwise.

Notes
-----
Equivalent to ``m[::-1, ...]`` or ``np.flip(m, axis=0)``.
Requires the array to be at least 1-D.

Examples
--------
>>> import numpy as np
>>> A = np.diag([1.0, 2, 3])
>>> A
array([[1.,  0.,  0.],
       [0.,  2.,  0.],
       [0.,  0.,  3.]])
>>> np.flipud(A)
array([[0.,  0.,  3.],
       [0.,  2.,  0.],
       [1.,  0.,  0.]])

>>> rng = np.random.default_rng()
>>> A = rng.normal(size=(2,3,5))
>>> np.all(np.flipud(A) == A[::-1,...])
True

>>> np.flipud([1,2])
array([2, 1])

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