pandas.MultiIndex.truncate
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MultiIndex.truncate(before=None, after=None)[source]
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Slice index between two labels / tuples, return new MultiIndex Parameters: before : label or tuple, can be partial. Default None None defaults to start after : label or tuple, can be partial. Default None None defaults to end Returns: truncated : MultiIndex 
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Licensed under the 3-clause BSD License.
    https://pandas.pydata.org/pandas-docs/version/0.20.3/generated/pandas.MultiIndex.truncate.html