# 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)