sunset_angle uses `numpy.clip` that is not compatible with numpy 2

[deltamarnix]

Describe the bug
When calling sunset_angle with an xarray object, I receive an error. I have mentioned it here: pydata/xarray#7848 (comment).

The problem is the compatibility of numpy and xarray in numpy 2.
It's likely the best way to solve this by checking for the type of data (xarray.DataArray), and then explicitly calling da.clip(-1,1), instead of numpy.clip(da, -1, 1).

This is the line of code that goes wrong:

pyet/pyet/meteo_utils.py

Line 326 in ff41178

return arccos(clip(-tan(sol_dec.values) * tan(lat).T, -1, 1)).T

The error is: TypeError: DataWithCoords.clip() got an unexpected keyword argument 'out'.

numpy version: 2.1.3
xarray version: 2025.1.2
pyet version: 1.3.1

[deltamarnix]

rad_utils.py also has a call to clip that will need fixing:

pyet/pyet/rad_utils.py

Line 202 in ff41178

solar_rat = clip(rs / rso, 0.3, 1)

[raoulcollenteur]

Thanks for reporting @deltamarnix ! We'll work on this over the next couple of weeks to fix this. Or, if you want, feel free to open a PR with the suggested changes :)

Cheers,
Raoul

[deltamarnix]

I've looked a little deeper into this and reported the issue to xarray. pydata/xarray#10103. It seems that the TypeError happens as part of a DeprecationWarning and I had my warnings as errors enabled in pytest.

To avoid the DeprecationWarning, it's still possible to do a type check, but it might be up to xarray to fix the issue.