`numpy.random:RandomState.permutation`

Signature

def permutation ( x )

Randomly permute a sequence, or return a permuted range.

If x is a multi-dimensional array, it is only shuffled along its first index.

x : int or array_like: If x is an integer, randomly permute np.arange(x). If x is an array, make a copy and shuffle the elements randomly.

np.random.permutation(10)

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np.random.permutation([1, 4, 9, 12, 15])

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arr = np.arange(9).reshape((3, 3))

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np.random.permutation(arr)

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