Index.factorize(sort=False, na_sentinel=-1)

Index.T return the transpose, which is by definition self

Index.get_value(series, key)

Index.is_(other)

Index.is_unique = None

Index.insert(loc, item)

Index.name = None

Index.is_monotonic alias for is_monotonic_increasing (deprecated)

Index.slice_indexer(start=None, end=None, step=None, kind=None)

Index.to_datetime(dayfirst=False)