feat: adding support for numpy.real, imag, round, angle,

[tcawlfield]

Closes #2917

This issue does not mention round explicitly. and it does mention around which I have not duplicated yet.
I could additionally implement numpy.fix and real_if_close.

There is an error in my attempt to support the out=<array> optional argument -- see discussion.

[tcawlfield]

Are there automatic code formatters and formatting checks? I guess I'll find out! Oh, I did find out and there are indeed.

[ianna]

Are there automatic code formatters and formatting checks? I guess I'll find out! Oh, I did find out and there are indeed.

Indeed, they are. You can run pre-commit run --all and fix the warnings before pushing then you will not need to pull the automatically updated branch from remote.

[jpivarski]

We don't yet have automatic code formatting on C++, but black ruff auto-formats Python. (And some other things in pre-commit format YAML and TOML.) We've talked about formatting C++ (#34, #1865, #2902), but never converged.

I agree with @ianna that it's more convenient to run pre-commit locally, since formatting changes can automatically write new commits to the PR, and then if you commit on your local clone, you've got a conflict to manage.

[jpivarski]

This implements real, imag, angle, and round as NEP-18 overloads, since they're not ufuncs like np.floor:

>>> np.real
<function real at 0x70646be60d70>
>>> np.imag
<function imag at 0x70646be613f0>
>>> np.angle
<function angle at 0x7063e9b4ac30>
>>> np.round
<function round at 0x70646bfd3eb0>
>>> np.floor
<ufunc 'floor'>

Overall, it looks good; I just have a few inline requested changes.

[jpivarski]

Let me know when you want me to re-review this!

[jpivarski]

Great, thanks! This one is done and I'll merge it.

[jpivarski]

@all-contributors please add @tcawlfield for code

[allcontributors]

@jpivarski

I've put up a pull request to add @tcawlfield! 🎉