CategoricalIndex + and - should not be set operations? #10039
Labels
API Design
Categorical
Categorical Data Type
Indexing
Related to indexing on series/frames, not to indexes themselves
Milestone
Related with the issue I just opened (#10038), I relooked at the set operation deprecation issues we had before (xref #8227, #9095, #9630).
To make a summary:
But now, for the CategoricalIndex added, it is a set operation again (but with a warning):
As this is a new index, we should at once use the correct behaviour?
(Which is raising a TypeError I think?)
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