Classe « Categorical »

Méthode pandas.Categorical.add_categories

Signature de la méthode add_categories

def add_categories(self, new_categories, inplace=False) 

Description

add_categories.__doc__

        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 : bool, default False
           Whether or not to add the categories inplace or return a copy of
           this categorical with added categories.

        Returns
        -------
        cat : Categorical or None
            Categorical with new categories added or None if ``inplace=True``.

        Raises
        ------
        ValueError
            If the new categories include old categories or do not validate as
            categories

        See Also
        --------
        rename_categories : Rename categories.
        reorder_categories : Reorder categories.
        remove_categories : Remove the specified categories.
        remove_unused_categories : Remove categories which are not used.
        set_categories : Set the categories to the specified ones.