I build most of my classes that way in python. class Motor: def __init__(self): self.max_speed = 10.0 self.clockwise = True

I build most of my classes that way in python. class Motor: def __init__(self): self.max_speed = 10.0 self.clockwise = True self.controller = Controller() def set_max_speed(self, max_speed: float=10.0) -> 'Self': self.max_speed = max(0.0, max_speed) return self def start(self) -> 'Self': self.controller.start() return self etc.. Then you can use it as follows: motor = Motor().set_max_speed(5.0).start() There is nothing stopping you from building iterators that work the same way