BUG: Ensure dataframe preserves categorical indices with categorial series#57635

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jmarintur wants to merge 11 commits intopandas-dev:mainfrom

jmarintur:ensure-df-series-categorical

Commits on Feb 26, 2024

Ensure dataframe preserves categorical index in constructor with categorical series
jmarin
committed

Commits on Mar 2, 2024

Modify union to properly handle categoricalIndex
jmarin
committed

Commits on Mar 3, 2024

Modify union to properly handle categoricalIndex
jmarin
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merge branch
jmarin
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Handling properly all cases and adapt tests accordingly
jmarin
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Type: ignore[attr-define] when self and other are CategoricalIndex
jmarin
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Commits on Mar 6, 2024

Use union_categoricals instead of union1d from numpy
jmarin
committed

Commits on Mar 7, 2024

Commits on Mar 27, 2024

Improve code to handle it in the original conditional
jmarin
committed