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Classe « Categorical »

Méthode pandas.Categorical.add_categories

Signature de la méthode add_categories

def add_categories(self, new_categories) -> 'Self' 

Description

help(Categorical.add_categories)

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.

Returns
-------
Categorical
    Categorical with new categories added.

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.

Examples
--------
>>> c = pd.Categorical(['c', 'b', 'c'])
>>> c
['c', 'b', 'c']
Categories (2, object): ['b', 'c']

>>> c.add_categories(['d', 'a'])
['c', 'b', 'c']
Categories (4, object): ['b', 'c', 'd', 'a']

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