class Observer(object): def __init__(self,subject): self.subject = subject self.weather = self.subject.weather self.subject.add_observer(self) def update(self,weather,temperature,tips): self.weather = weather self.temperature = temperature self.tips = tips self.display() def display(self): return ("今日天氣：{} \n今日氣溫： {} \n今日建議：{}").format(self.weather,self.temperature,self.tips) class Weather(object): def __init__(self): self.observers = [] self.weather = "" self.temperature = "" self.tips = "" def add_observer(self,observer): self.observers.append(observer) def delete_observer(self,observer): if observer in self.observers: self.observers.remove(observer) def notify(self): for observer in self.observers: observer.update(self.weather,self.temperature,self.tips) def add_data(self,weather,temperature,tips): self.weather = weather self.temperature = temperature self.tips = tips self.notify() if name=='main': subject= Weather() observer = Observer(subject) subject.add_data('多云轉(zhuǎn)陰','10~23℃','請(qǐng)注意別感冒！') subject.add_observer('張三') subject.add_observer('李四') subject.add_observer('Ben') def Print(): ox = subject.observers for o in ox: weather_data = observer.display() print("{}你好，以下是今日的天氣播報(bào)：\n{}\n").format(o,weather_data) Print() 初學(xué)Python，在做觀察者模式的時(shí)候發(fā)現(xiàn)print會(huì)打印出多余的東西 <main.Observer object at 0x0224F3B0>你好，以下是今日的天氣播報(bào)： 今日天氣：多云轉(zhuǎn)陰 今日氣溫： 10~23℃ 今日建議：請(qǐng)注意別感冒！ 請(qǐng)問(wèn)這是什么原因，以及解決之道