pandas.CategoricalIndex.add_categories¶
- CategoricalIndex.add_categories(*args, **kwargs)¶
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_categories : category or list-like of category
The new categories to be included.
inplace : boolean (default: False)
Whether or not to add the categories inplace or return a copy of this categorical with added categories.
Returns: cat : Categorical with new categories added or None if inplace.
Raises: ValueError
If the new categories include old categories or do not validate as categories