ENH add feature_names_in_ in FeatureUnion #25220
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- added self._check_feature_names(...) to the .fit(...) method in FeatureUnion to allow access to the `.feature_names_in_` attribute if `X` has features names, e.g. a pandas.DataFrame - updated FeatureUnion docstring to reflect the addition of .feature_names_in_ attribute modified: sklearn/tests/test_pipeline.py - added test_feature_union_feature_names_in_() to test that FeatureUnion has a `.feature_names_in_` attribute if fitted with a pandas.DataFrame and not if fitted with a numpy array
- changelog updated with description of work
Kshitij68
reviewed
Dec 22, 2022
- made changelog description more precise
- typo -- removed period (.) before `columns`
- removed `self._check_feature_names(...) from `.fit(...)` method in `FeatureUnion` - added `feature_names_in_()` property to `FeatureUnion` to use first transformer's `feature_names_in_` attribute if present modified: sklearn/tests/test_pipeline.py - updated docstring for `test_feature_union_feature_names_in_()` to be more precise - added additional assertions to check if the `feature_names_in_` attribute is available to `FeatureUnion` if it's instantiated with a transformer that has already been fit
- updated changelog description to include `pandas.DataFrame` - corrected user signature to match github account
- added pandas import to `test_feature_union_feature_names_in_` so ImportError in azure-pipelines will pass
…it176131/scikit-learn into feature_union_feature_names_in_
newline/whitespace between change log updates. Co-authored-by: Thomas J. Fan <thomasjpfan@gmail.com>
added period at end of docstring Co-authored-by: Thomas J. Fan <thomasjpfan@gmail.com>
- removed train-test-split per code suggestion -- using `X` directly
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@thomasjpfan -- I've made the changes you suggested. Ready for another review! 🙂 |
betatim
approved these changes
Jan 13, 2023
glemaitre
approved these changes
Jan 14, 2023
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Reference Issues/PRs
ENHANCEMENT #24754
What does this implement/fix? Explain your changes.
The
FeatureUnionclass did not previously have the.feature_names_in_attribute if fitted with apandas.DataFrame. This allows access to the attribute.Any other comments?
modified: sklearn/pipeline.py
self._check_feature_names(...)to the.fit(...)method inFeatureUnionto allow access to the.feature_names_in_attribute ifXhas features names, e.g. apandas.DataFrameFeatureUniondocstring to reflect the addition of.feature_names_in_attributemodified: sklearn/tests/test_pipeline.py
test_feature_union_feature_names_in_()to test thatFeatureUnionhas a.feature_names_in_attribute if fitted with apandas.DataFrameand not if fitted with anumpyarray