Ignore ruff/Pylint rule PLR0124

PLR0124 Name compared with itself

Author: DimitriPapadopoulos

pyproject.toml

@@ -293,6 +293,8 @@ ignore = [
 [tool.ruff.lint.per-file-ignores]
 # don't enforce absolute imports
 "asv_bench/**" = ["TID252"]
+# comparison with itself in tests
+"xarray/tests/**" = ["PLR0124"]
 # looks like ruff bugs
 "xarray/core/_typed_ops.py" = ["PYI034"]
 "xarray/namedarray/_typing.py" = ["PYI018", "PYI046"]

xarray/core/duck_array_ops.py

@@ -193,7 +193,7 @@ def isnull(data):
         # types. For full consistency with pandas, we should accept None as
         # a null value as well as NaN, but it isn't clear how to do this
         # with duck typing.
-        return data != data
+        return data != data  # noqa: PLR0124
 
 
 def notnull(data):