Add new categories.

new_categories will be included at the last/highest place in the categories and will be unused directly after this call.

param new_categories
category or list-like of category

The new categories to be included.

param inplace
bool, default False

Whether or not to add the categories inplace or return a copy of this categorical with added categories.


cat : Categorical with new categories added or None if inplace.


If the new categories include old categories or do not validate as categories


This feature is currently unsupported by Intel Scalable Dataframe Compiler