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

On 12/08/2015 07:40 PM, Stephan Hoyer wrote:

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

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, e.g., np.random.randint(np.iinfo(int).min, np.iinfo(int).max, size=(1,)).view(np.uint8) # creates 8 random bytes

Just to note, the line I pasted doesn't copy either, according to the OWNDATA flag.

Cheers, Allan