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pandas.MultiIndex.swaplevel — pandas 2.3.1 documentation

pandas.MultiIndex.swaplevel#
MultiIndex.swaplevel(i=-2, j=-1)[source]#

Swap level i with level j.

Calling this method does not change the ordering of the values.

Parameters:
iint, str, default -2

First level of index to be swapped. Can pass level name as string. Type of parameters can be mixed.

jint, str, default -1

Second level of index to be swapped. Can pass level name as string. Type of parameters can be mixed.

Returns:
MultiIndex

A new MultiIndex.

Examples

>>> mi = pd.MultiIndex(levels=[['a', 'b'], ['bb', 'aa']],
...                    codes=[[0, 0, 1, 1], [0, 1, 0, 1]])
>>> mi
MultiIndex([('a', 'bb'),
            ('a', 'aa'),
            ('b', 'bb'),
            ('b', 'aa')],
           )
>>> mi.swaplevel(0, 1)
MultiIndex([('bb', 'a'),
            ('aa', 'a'),
            ('bb', 'b'),
            ('aa', 'b')],
           )

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