filterwarnings("ignore:invalid value encountered in sqrt") ?

[cyschneck]

What is your issue?

I am cleaning up some deprecation warnings on a repo and encountered:

dask/core.py:127: RuntimeWarning: invalid value encountered in sqrt

I believe the issue is arising within xarray, even though dask is triggering it. I noticed that in the xarray tests, the same warning is being filtered out to be ignored.

Do you know where this issue is arising and why is it being filtered?

Simple reproducible form: (Python 3.12, Linux)

import xarray as xr
import numpy as np
from geocat.comp import *

t1 = np.array([80, 80, 60, 30])
rh1 = np.array([40, 75, 90, 50])

t = xr.DataArray(t1).chunk(3)
rh = xr.DataArray(rh1).chunk(3)
out = heat_index(t, rh)
print(out.values)

Output

/home/user/miniconda3/envs/geocat_comp_build/lib/python3.12/site-packages/dask/core.py:127: RuntimeWarning: invalid value encountered in sqrt
  return func(*(_execute_task(a, cache) for a in args))
[79.79      83.5751104 59.965     30.       ]

[dcherian]

Unfortunately there's not much we can do with dask: dask/dask#3245

aside from setting np.errstate inside dask (#5151 dask/dask#8125)