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

MultiIndex.order(return_indexer=False, ascending=True)

MultiIndex.flags

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

MultiIndex.has_duplicates

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

MultiIndex.is_unique = None

MultiIndex.droplevel(level=0)

MultiIndex.asof(label)

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