'xarray.core' has no attribute 'ops' in xarray 2025.03.0

[jensdebruijn]

Setup Information

• Xclim version: 0.55.1
• Python version: python 3.13.2
• Operating System: linux

Description

When running standardized_precipitation_evapotranspiration_index xclim runs into the error

File ".../.venv/lib/python3.13/site-packages/xclim/indices/generic.py", line 282, in get_op
return xr.core.ops.get_op(binary_op) # noqa
^^^^^^^^^^^
AttributeError: module 'xarray.core' has no attribute 'ops'

The error does not occur with the previous version of xarray 2025.01.2

I believe xr.computation.ops.get_op should become xr.core.ops.get_op. My suggested fix would be:

    if xr.__version__ <= "2025.1.2":
        return xr.core.ops.get_op(binary_op)
    else:
        return xr.computation.ops.get_op(binary_op)  # noqa

Steps To Reproduce

import xarray as xr
import xclim.indices as xci

wb = xr.DataArray(
    data=range(100),
    coords={"time": xr.cftime_range("2000-01-01", periods=100, freq="M")},
    dims=["time"],
    attrs={"units": "kg m-2 s-1"},
)

xci.standardized_precipitation_evapotranspiration_index(wb=wb)

Additional context

No response

Contribution

• I would be willing/able to open a Pull Request to address this bug.

Code of Conduct

• I agree to follow this project's Code of Conduct

[aulemahal]

Thanks for the issue @jensdebruijn ! This should have been detected by the upstream CI... I just realized it's been failing (for another reason) for the last week but the automatic issue maker seems not to have been triggered.

If we can solve this without using "private" modules from xarray, it would be better I guess.

[coxipi]

Hmm, weird. This error was triggerred in the current PR #2112 though

[jensdebruijn]

@aulemahal I made a suggestion to solve this without the private modules, see: #2114