mars.dataframe.Index.map¶
- Index.map(mapper, na_action=None, dtype=None, memory_scale=None)¶
Map values using input correspondence (a dict, Series, or function).
- 参数
mapper (function, dict, or Series) – Mapping correspondence.
na_action ({None, 'ignore'}) – If ‘ignore’, propagate NA values, without passing them to the mapping correspondence.
dtype (np.dtype, default None) – Specify return type of the function. Must be specified when we cannot decide the return type of the function.
memory_scale (float) – Specify the scale of memory uses in the function versus input size.
- 返回
applied – 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.
- 返回类型
Union[Index, MultiIndex], inferred