pandas.Index.join

Index.join(self, other, how='left', level=None, return_indexers=False, sort=False) [source]

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 sort : boolean, default False Sort the join keys lexicographically in the result Index. If False, the order of the join keys depends on the join type (how keyword) New in version 0.20.0.
Returns:	join_index, (left_indexer, right_indexer)