Remove mypy exclusion for test_dataarray #10761
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This commit removes test_dataarray from the mypy exclusions list and fixes all resulting type errors: - Add type ignores for intentional test cases that verify error handling - Add type ignore for scipy import fallback to object - Split test_astype_attrs to handle Variable separately from DataArray/Dataset due to different method signatures (Variable.astype doesn't have keep_attrs) - Add type ignores for MultiIndex.get_level_values calls where names may be None All tests continue to pass after these changes. Co-authored-by: Claude <noreply@anthropic.com>
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This email format is more likely to be recognized by GitHub for bot/AI co-authorship attribution. Co-authored-by: Claude <noreply@anthropic.com>
Use the established pattern of including unused-ignore in the type ignore comments for cases where the ignore necessity varies by environment: - scipy_.py: scipy import is optional, so ignore is unused when scipy is installed - test_dataarray.py: pandas-stubs versions vary in their MultiIndex.names typing Co-authored-by: Claude <noreply@anthropic.com>
Illviljan
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Sep 18, 2025
xarray/tests/test_dataarray.py
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| # Variable has different astype signature without keep_attrs parameter | ||
| va = self.va.copy() | ||
| va.attrs["foo"] = "bar" | ||
| assert va.attrs == va.astype(float).attrs | ||
| assert not va.astype(float, keep_attrs=False).attrs |
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revert, no code difference. But maybe look in to Variable.astype?
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I tried to clarify the comment
The split is required for mypy type checking, not due to API differences. Variable, DataArray, and Dataset don't share a common base class that mypy recognizes, so when they're in the same list, mypy infers the type as 'object', which lacks the attrs and astype methods. Co-authored-by: Claude <noreply@anthropic.com>
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From Claude:
Summary
This PR removes
xarray.tests.test_dataarrayfrom the mypy exclusions list, enabling type checking for this test file.Changes Made
test_dataarrayfrom the mypycheck_untyped_defs = falseexclusion list inpyproject.tomltype: ignorecomments for test cases that intentionally test error conditionstype: ignorefor the scipy import fallback patterntest_astype_attrsto handleVariableseparately fromDataArray/Datasetdue to different method signaturestype: ignoreforMultiIndex.get_level_valuescalls where level names could theoretically beNoneTest Plan
test_dataarray.pycontinue to passdmypy runshows no type errorsThis is part of the ongoing effort to improve type coverage in the xarray test suite.