[Numpy-discussion] array of random numbers fails to construct

Stephan Hoyer shoyer at gmail.com
Tue Dec 8 19:40:12 EST 2015

On Sun, Dec 6, 2015 at 3:55 PM, Allan Haldane <allanhaldane at gmail.com>

> I've also often wanted to generate large datasets of random uint8 and
> uint16. As a workaround, this is something I have used:
> np.ndarray(100, 'u1', np.random.bytes(100))
> It has also crossed my mind that np.random.randint and np.random.rand
> could use an extra 'dtype' keyword. It didn't look easy to implement though.

Another workaround that avoids creating a copy is to use the view method,
np.random.randint(np.iinfo(int).min, np.iinfo(int).max,
size=(1,)).view(np.uint8)  # creates 8 random bytes

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