pandas.CategoricalIndex.set_names¶
- CategoricalIndex.set_names(names, level=None, inplace=False)¶
Set new names on index. Defaults to returning new index.
Parameters: names : str or sequence
name(s) to set
level : int or level name, or sequence of int / level names (default None)
If the index is a MultiIndex (hierarchical), level(s) to set (None for all levels) Otherwise level must be None
inplace : bool
if True, mutates in place
Returns: new index (of same type and class...etc) [if inplace, returns None]
Examples
>>> Index([1, 2, 3, 4]).set_names('foo') Int64Index([1, 2, 3, 4], dtype='int64') >>> Index([1, 2, 3, 4]).set_names(['foo']) Int64Index([1, 2, 3, 4], dtype='int64') >>> idx = MultiIndex.from_tuples([(1, u'one'), (1, u'two'), (2, u'one'), (2, u'two')], names=['foo', 'bar']) >>> idx.set_names(['baz', 'quz']) MultiIndex(levels=[[1, 2], [u'one', u'two']], labels=[[0, 0, 1, 1], [0, 1, 0, 1]], names=[u'baz', u'quz']) >>> idx.set_names('baz', level=0) MultiIndex(levels=[[1, 2], [u'one', u'two']], labels=[[0, 0, 1, 1], [0, 1, 0, 1]], names=[u'baz', u'bar'])