pandas.Index.map¶

Index.map(self, mapper, na_action=None)[source]¶

Map values using input correspondence (a dict, Series, or function).

Parameters

mapperfunction, dict, or Series: Mapping correspondence.
na_action{None, ‘ignore’}: If ‘ignore’, propagate NA values, without passing them to the mapping correspondence.

Returns

appliedUnion[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.

pandas.Index.join pandas.Index.max