pandas.CategoricalIndex.join

CategoricalIndex.join(other, how='left', level=None, return_indexers=False)

this is an internal non-public method

Compute join_index and indexers to conform data structures to the new index.

Parameters:	other : Index how : {‘left’, ‘right’, ‘inner’, ‘outer’} level : int or level name, default None return_indexers : boolean, default False
Returns:	join_index, (left_indexer, right_indexer)