# pandas.Series.cat.add_categories¶

Series.cat.add_categories(*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_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. cat : Categorical with new categories added or None if inplace. ValueError If the new categories include old categories or do not validate as categories
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