Add attrs to future swath definition

[mraspaud]

This PR adds attrs to the future swath definition.

• Tests passed
• Passes git diff origin/main **/*py | flake8 --diff
• Fully documented

[djhoese]

You brought up nprocs on slack, do we want to deprecate that with a warning in the old class?

[mraspaud]

I don't know. On one hand, we should encourage users to go over to dask, but on the other hand, maybe that's a showstopper for some (I have not heard of such myself though)?

[djhoese]

I think it is more of the nprocs on __init__ being a problem. Having it in other places is fine (although could be refactored to be presented differently). For example, getting coordinates or reprojecting or whatever, then nprocs makes sense as a convenience to say "do it with multiple cores, whatever that means". I don't think dask is usually a show stopper, but it may be an unnecessary dependency in some users eyes. Especially if it becomes a hard requirement when users are totally fine doing everything in numpy land.

Side note: nprocs could maybe be a global setting in pyresample.config to hide it away.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (eaf8367) 94.05% compared to head (5b05353) 94.01%.
Report is 42 commits behind head on main.

Files	Patch %	Lines
pyresample/future/geometry/swath.py	95.45%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #578      +/-   ##
==========================================
- Coverage   94.05%   94.01%   -0.04%     
==========================================
  Files          90       92       +2     
  Lines       13575    13836     +261     
==========================================
+ Hits        12768    13008     +240     
- Misses        807      828      +21     

Flag	Coverage Δ
unittests	94.01% <98.07%> (-0.04%)	⬇️

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[coveralls]

coverage: 93.676% (+0.03%) from 93.649%
when pulling 5b05353 on mraspaud:add-attrs-to-swath-def
into eaf8367 on pytroll:main.

[djhoese]

Please remove nprocs. The commit message says "for backwards compatibility". There is no backwards compatibility in the future modules...at least let's try really hard to avoid it. If it is going to be here then it at least needs a warning or something about it being deprecated. But I'd rather have a create_swath_def pytest fixture that excludes nprocs from the kwargs when creating the new version of the swath class.

[mraspaud]

Sorry, I didn't understand the gist of your previous comments obviously. Removing.

[mraspaud]

done, ready for rereview :)

[djhoese]

Thanks for going back and forth with me. Looks good. It's giving me a lot of ideas on where we could take this, but we'll have to get to that later.