code: def get_super_assignment(pyname):
      
      try:
          pyclass, attr_name = get_class_with_attr_name(pyname)
      except TypeError:
          return
      else:
          for super_pyclass in get_mro(pyclass)[1:]:
              if attr_name in super_pyclass:
                  return super_pyclass[attr_name]
docs: :type pyname: rope.base.pynamesdef.AssignedName
      :type: rope.base.pynamesdef.AssignedName