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

Index.intersection(other)

Index.all(*args, **kwargs)

Index.argsort(*args, **kwargs)

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

Index.difference(other)

Index.shift(periods=1, freq=None)

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

Index.to_native_types(slicer=None, **kwargs)

Index.insert(loc, item)