code: def select_as_coordinates(
              self, key, where=None, start=None, stop=None, **kwargs):
          
          where = _ensure_term(where, scope_level=1)
          return self.get_storer(key).read_coordinates(where=where, start=start,
                                                       stop=stop, **kwargs)
docs: return the selection as an Index
  
          Parameters
          ----------
          key : object
          where : list of Term (or convertible) objects, optional
          start : integer (defaults to None), row number to start selection
          stop  : integer (defaults to None), row number to stop selection