林 的博客

# -*- coding: utf-8 -*-class Observer: def __init__(self,observer_id): self.observer_id = observer_id def update(self,subject): print(f'{self.observer_id}: subject updated to...

# -*- coding: utf-8 -*-# 假定有一个类Computer依赖于类Cpuclass Cpu: def __init__(self,brand): self.brand = brand def __str__(self): return f"CPU: <{self.brand}>"class Computer...