pandas.CategoricalIndex.add_categories¶
-
CategoricalIndex.add_categories(self, *args, **kwargs)[source]¶ Add new categories.
new_categories will be included at the last/highest place in the categories and will be unused directly after this call.
- Parameters
- new_categoriescategory or list-like of category
The new categories to be included.
- inplacebool, default False
Whether or not to add the categories inplace or return a copy of this categorical with added categories.
- Returns
- catCategorical with new categories added or None if inplace.
- Raises
- ValueError
If the new categories include old categories or do not validate as categories