cooperative multiple inheritance paradigm in python

cooperative.py

class Vehicle:
  def __init__(self, color: str) -> None:
    self._color = color


class ConstructionMachine:
  def __init__(self) -> None:
    super().__init__()

  def rumble(self) -> str:
    return 'zzz' + super().__str__()


class Tractor(ConstructionMachine, Vehicle):
  def __init__(self, color: str) -> None:
    Vehicle.__init__(self, color)
    ConstructionMachine.__init__(self)


if __name__ == '__main__':
  Tractor('yellow')