Classe « Categorical »

Méthode pandas.Categorical.unique

Signature de la méthode unique

def unique(self) 

Description

unique.__doc__

        Return the ``Categorical`` which ``categories`` and ``codes`` are
        unique. Unused categories are NOT returned.

        - unordered category: values and categories are sorted by appearance
          order.
        - ordered category: values are sorted by appearance order, categories
          keeps existing order.

        Returns
        -------
        unique values : ``Categorical``

        See Also
        --------
        pandas.unique
        CategoricalIndex.unique
        Series.unique : Return unique values of Series object.

        Examples
        --------
        An unordered Categorical will return categories in the
        order of appearance.

        >>> pd.Categorical(list("baabc")).unique()
        ['b', 'a', 'c']
        Categories (3, object): ['b', 'a', 'c']

        >>> pd.Categorical(list("baabc"), categories=list("abc")).unique()
        ['b', 'a', 'c']
        Categories (3, object): ['b', 'a', 'c']

        An ordered Categorical preserves the category ordering.

        >>> pd.Categorical(
        ...     list("baabc"), categories=list("abc"), ordered=True
        ... ).unique()
        ['b', 'a', 'c']
        Categories (3, object): ['a' < 'b' < 'c']