NumPy

numpy.random.Generator.shuffle

method

Generator.shuffle(x, axis=0)

Modify a sequence in-place by shuffling its contents.

The order of sub-arrays is changed but their contents remains the same.

Parameters
xarray_like

The array or list to be shuffled.

axisint, optional

The axis which x is shuffled along. Default is 0. It is only supported on ndarray objects.

Returns
None

Examples

>>> rng = np.random.default_rng()
>>> arr = np.arange(10)
>>> rng.shuffle(arr)
>>> arr
[1 7 5 2 9 4 3 6 0 8] # random
>>> arr = np.arange(9).reshape((3, 3))
>>> rng.shuffle(arr)
>>> arr
array([[3, 4, 5], # random
       [6, 7, 8],
       [0, 1, 2]])
>>> arr = np.arange(9).reshape((3, 3))
>>> rng.shuffle(arr, axis=1)
>>> arr
array([[2, 0, 1], # random
       [5, 3, 4],
       [8, 6, 7]])

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