Classe « MultiIndex »

Méthode pandas.MultiIndex.set_levels

Signature de la méthode set_levels

def set_levels(self, levels, level=None, inplace=None, verify_integrity=True) 

Description

set_levels.__doc__

        Set new levels on MultiIndex. Defaults to returning new index.

        Parameters
        ----------
        levels : sequence or list of sequence
            New level(s) to apply.
        level : int, level name, or sequence of int/level names (default None)
            Level(s) to set (None for all levels).
        inplace : bool
            If True, mutates in place.

            .. deprecated:: 1.2.0
        verify_integrity : bool, default True
            If True, checks that levels and codes are compatible.

        Returns
        -------
        new index (of same type and class...etc) or None
            The same type as the caller or None if ``inplace=True``.

        Examples
        --------
        >>> idx = pd.MultiIndex.from_tuples(
        ...     [
        ...         (1, "one"),
        ...         (1, "two"),
        ...         (2, "one"),
        ...         (2, "two"),
        ...         (3, "one"),
        ...         (3, "two")
        ...     ],
        ...     names=["foo", "bar"]
        ... )
        >>> idx
        MultiIndex([(1, 'one'),
            (1, 'two'),
            (2, 'one'),
            (2, 'two'),
            (3, 'one'),
            (3, 'two')],
           names=['foo', 'bar'])

        >>> idx.set_levels([['a', 'b', 'c'], [1, 2]])
        MultiIndex([('a', 1),
                    ('a', 2),
                    ('b', 1),
                    ('b', 2),
                    ('c', 1),
                    ('c', 2)],
                   names=['foo', 'bar'])
        >>> idx.set_levels(['a', 'b', 'c'], level=0)
        MultiIndex([('a', 'one'),
                    ('a', 'two'),
                    ('b', 'one'),
                    ('b', 'two'),
                    ('c', 'one'),
                    ('c', 'two')],
                   names=['foo', 'bar'])
        >>> idx.set_levels(['a', 'b'], level='bar')
        MultiIndex([(1, 'a'),
                    (1, 'b'),
                    (2, 'a'),
                    (2, 'b'),
                    (3, 'a'),
                    (3, 'b')],
                   names=['foo', 'bar'])

        If any of the levels passed to ``set_levels()`` exceeds the
        existing length, all of the values from that argument will
        be stored in the MultiIndex levels, though the values will
        be truncated in the MultiIndex output.

        >>> idx.set_levels([['a', 'b', 'c'], [1, 2, 3, 4]], level=[0, 1])
        MultiIndex([('a', 1),
            ('a', 2),
            ('b', 1),
            ('b', 2),
            ('c', 1),
            ('c', 2)],
           names=['foo', 'bar'])
        >>> idx.set_levels([['a', 'b', 'c'], [1, 2, 3, 4]], level=[0, 1]).levels
        FrozenList([['a', 'b', 'c'], [1, 2, 3, 4]])