Fix issue with xr.core.ops renamed in versions of xarray>=2025.3.0

.zenodo.json

@@ -163,6 +163,11 @@
       "name": "Wong, Jack Kit-tai",
       "affiliation": "University of Toronto, Toronto, Ontario, Canada",
       "orcid": "0000-0003-1408-1502"
+    },
+    {
+      "name": "de Bruijn, Jens",
+      "affiliation": "Vrije Universiteit, Amsterdam, The Netherlands",
+      "orcid": "0000-0003-3961-6382"
     }
   ],
   "keywords": [

AUTHORS.rst

@@ -50,3 +50,4 @@ Contributors
 * Sebastian Lehner <[email protected]> `@seblehner <https://github.com/seblehner>`_
 * Baptiste Hamon <[email protected]> `@baptistehamon <https://github.com/baptistehamon>`_
 * Jack Kit-tai Wong <[email protected]> `@jack-ktw <https://github.com/jack-ktw>`_
+* Jens de Bruijn <[email protected]> `@jensdebruijn <https://github.com/jensdebruijn>`_

CHANGELOG.rst

@@ -4,12 +4,13 @@ Changelog
 
 v0.56.0 (unreleased)
 --------------------
-Contributors to this version: Trevor James Smith (:user:`Zeitsperre`), Hui-Min Wang (:user:`Hem-W`), Jack Kit-tai Wong(:user:`jack-ktw`), Adrien Lamarche (:user:`LamAdr`), Éric Dupuis (:user:`coxipi`).
+Contributors to this version: Trevor James Smith (:user:`Zeitsperre`), Hui-Min Wang (:user:`Hem-W`), Jack Kit-tai Wong(:user:`jack-ktw`), Adrien Lamarche (:user:`LamAdr`), Éric Dupuis (:user:`coxipi`), Jens de Bruijn (:user:`jensdebruijn`).
 
 Bug fixes
 ^^^^^^^^^
 * Fix installation instructions in the Contributing guide (:issue:`2088`, :pull:`2089`).
 * Fixed parameter order in typing.cast() causing intermittent errors in solar_zenith_angle calculation. (:issue:`2097`, :pull:`2098`)
+* `xclim` now uses directly `operator` instead of using `xarray`'s derived `get_op` function. A refactoring in `xarray` had changed the position of `get_op` which caused a bug.  (:issue:`2113`, :pull:`2114`).
 * Fixed an issue with star-annotated call signatures to maintain Python 3.10 compatibility. (:pull:`2116`).
 
 Breaking changes

src/xclim/indices/generic.py

@@ -7,6 +7,7 @@
 
 from __future__ import annotations
 
+import operator
 import warnings
 from collections.abc import Callable, Sequence
 
@@ -278,7 +279,7 @@ def get_op(op: str, constrain: Sequence[str] | None = None) -> Callable:
         if op not in constraints:
             raise ValueError(f"Operation `{op}` not permitted for indice.")
 
-    return xr.core.ops.get_op(binary_op)  # noqa
+    return getattr(operator, f"__{binary_op}__")
 
 
 def compare(