pandas.Index.map — pandas 0.24.0rc1 documentation (original) (raw)
Index. map(mapper, na_action=None)[source]¶
Map values using input correspondence (a dict, Series, or function).
| Parameters: | mapper : function, dict, or Series Mapping correspondence. na_action : {None, ‘ignore’} If ‘ignore’, propagate NA values, without passing them to the mapping correspondence. |
|---|---|
| Returns: | applied : Union[Index, MultiIndex], inferred The output of the mapping function applied to the index. If the function returns a tuple with more than one element a MultiIndex will be returned. |