DOC add set_output custom transformer example#34141
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Maisha2001
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May 28, 2026
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Reference Issues/PRs
Closes #26460.
What does this implement/fix? Explain your changes.
Adds a small custom transformer example to the developer
set_outputAPI docs. The example shows how a transformer with one-to-one input/output features can inherit fromOneToOneFeatureMixin,TransformerMixin, andBaseEstimatorso thatset_output(transform="pandas")preserves the input feature names in the pandas output.AI usage disclosure
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Any other comments?
Local checks run:
git diff --checkcodespell doc/developers/develop.rstscikit-learnpackage and confirmed it returns a pandasDataFramewith['height', 'weight']columns.I did not run a full local documentation build because the cloned source tree is not built in this environment and the Sphinx documentation dependencies were not installed.