FIX FunctionTransformer overwrite column names if not consistent#28241
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The failure will be solved by merging #28262 |
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As I mentioned before, my pull-request in pycaret to have scikit-learn 1.4 support failed, but now I have just modified the scikit-learn code on my laptop with the modifications in this PR, so far, I have run the scikit-learn test again pycaret that failed because of get_feature_names_out and now the test passed! For more context, I refer to my Pycaret pr with failing tests because of get_feature_names_out, it's here: pycaret/pycaret#3857 |
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closes #28232
This make the
FunctionTransformermore lenient by overwriting columns if the output is not consistent with the behaviour ofget_feature_names_out. We were previously raising an error instead but we used this inconsistency within theColumnTransformer.It remains one question: do we want to trigger a copy when setting the columns? I think it is weird that the input
Xget modified once passed in theFunctionTransformer.