Index.is_(other)

Index.isin(values, level=None)

Index.memory_usage(deep=False)

Index.fillna(value=None, downcast=None)

Index.item()

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

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

Index.drop_duplicates(*args, **kwargs)

Index.is_integer()

Index.nunique(dropna=True)