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MultiIndex.set_names(names, level=None, inplace=False)[source] -
Set new names on index. Defaults to returning new index.
Parameters: names : str or sequence
name(s) to set
level : int, 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
123456789101112131415>>> 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'])
MultiIndex.set_names()
2025-01-10 15:47:30
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