Index.nlevels

Index.asof_locs(where, mask)

Index.format(name=False, formatter=None, **kwargs)

Index.asof(label)

Index.set_names(names, level=None, inplace=False)

Index.map(mapper)

Index.get_duplicates()

Index.flags

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

Index.ndim return the number of dimensions of the underlying data, by definition 1