pandas.DataFrame.sortlevel
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DataFrame.sortlevel(level=0, axis=0, ascending=True, inplace=False, sort_remaining=True)[source]
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DEPRECATED: use DataFrame.sort_index()Sort multilevel index by chosen axis and primary level. Data will be lexicographically sorted by the chosen level followed by the other levels (in order) Parameters: level : int axis : {0 or ‘index’, 1 or ‘columns’}, default 0 ascending : boolean, default True inplace : boolean, default False Sort the DataFrame without creating a new instance sort_remaining : boolean, default True Sort by the other levels too. Returns: sorted : DataFrame See also 
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Licensed under the 3-clause BSD License.
    https://pandas.pydata.org/pandas-docs/version/0.20.3/generated/pandas.DataFrame.sortlevel.html