Add NumPy Stubs

[WillAyd]

We use ndarray often in our annotations, but it always just resolves to Any since it doesn't have any annotations natively. It looks like numpy has a separate Numpy-stubs repo under development:

https://github.com/numpy/numpy-stubs

Might be worth considering that as a development dependency. Certainly would like to find issues with ndarray usage sooner than later

@shoyer

[jbrockmendel]

MIght be a pipedream, but it would be nice if we could have numpy annotations consistent with the existing cython syntax, e.g. ndarray[np.float64, ndim=1]. Both for the consistency and the specificity.

[shoyer]

Yes, it's much bigger project to figure out a type system from multidimensional arrays. Some of the mypy devs are working on it. . Right now numpy-stubs could use some love. It would be great to get some contributions there.

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On Mon, Jul 29, 2019 at 8:07 AM jbrockmendel ***@***.***> wrote: MIght be a pipedream, but it would be nice if we could have numpy annotations consistent with the existing cython syntax, e.g. ndarray[np.float64, ndim=1]. Both for the consistency and the specificity. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#27589?email_source=notifications&email_token=AAJJFVWS2Q6SFVOUM3JDU3LQB4BSZA5CNFSM4IG4OGPKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD3BAIKA#issuecomment-516031528>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAJJFVTIPFJ2WCQS5NUBP3TQB4BSZANCNFSM4IG4OGPA> .

[simonjayhawkins]

@WillAyd With numpy types imminent, I think we can now close this issue. feel free to reopen if disagree.