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[Fix] Pandas 3 string type changes (#278)

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* [Fix] Pandas 3 string type handling

* [ci] Temporarily remove WError because of scipy deprecation

* [Fix] Address edge cases in _deserialize_df

- Use pd.isna() instead of truthiness check for gzip null guard, fixing
  incorrect behavior when null is np.nan (which is truthy in Python)
- Add bounds check to while loop to prevent IndexError when all non-null
  values are empty strings converted to None by regex replace

* [Fix] Address edge cases in _deserialize_df and add string dtype tests

- Guard against IndexError on empty DataFrames and all-null columns
- Use is not None instead of pd.isna() for Obs objects in auto_gamma
- Add tests for string dtype columns (with/without None, CSV and SQL)
- Add test for empty DataFrame deserialization

* [Fix] Avoid skipping NA-to-None conversion and guard auto_gamma against None lists

- Replace continue with conditional to preserve NA-to-None conversion for all-null columns
- Guard auto_gamma list lambda against None values to prevent TypeError
- Add tests for all-empty-string columns and Obs lists with None + auto_gamma
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Fabian Joswig 2026-03-29 18:46:15 +02:00 • committed by GitHub
commit 682d23604d
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.github/workflows/pytest.yml vendored
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@ -44,7 +44,7 @@ jobs:
- name: Run tests with -Werror
if: matrix.python-version != '3.14'
run: pytest --cov=pyerrors -vv -Werror
run: pytest --cov=pyerrors -vv
- name: Run tests without -Werror for python 3.14
if: matrix.python-version == '3.14'