MultiIndex.droplevel(level=0)

MultiIndex.to_hierarchical(n_repeat, n_shuffle=1)

MultiIndex.reorder_levels(order)

MultiIndex.get_duplicates()

MultiIndex.size return the number of elements in the underlying data

classmethod MultiIndex.from_arrays(arrays, sortorder=None, names=None)

MultiIndex.duplicated(*args, **kwargs)

MultiIndex.format(space=2, sparsify=None, adjoin=True, names=False, na_rep=None, formatter=None)

MultiIndex.is_unique = None

MultiIndex.searchsorted(key, side='left', sorter=None)