49 lines
1.2 KiB
Python
49 lines
1.2 KiB
Python
"""
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实例
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汤宝宝家有一台咖啡机，他会自动给美式咖啡加奶和糖...
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"""
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from abc import ABC, abstractmethod
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class Drink(ABC):
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price: float
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name: str
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@abstractmethod
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def cost(self) -> None:
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pass
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class Coffee(Drink):
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def __init__(self, name: str, price: float) -> None:
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self.name = name
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self.price = price
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def cost(self) -> None:
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print(f"一杯{self.name}咖啡，价格{self.price:.2f}元")
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class Maker:
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def __init__(self, drink: Drink, milk_price: float, sugar_price: float) -> None:
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self.drink = drink
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self.milk_price = milk_price
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self.sugar_price = sugar_price
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def cost(self) -> None:
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self.drink.cost()
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print(
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f"加了奶和糖，总价{self.drink.price + self.milk_price + self.sugar_price:.2f}元。"
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)
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if __name__ == "__main__":
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print("============= 装饰器模式 =============")
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print("自己泡杯咖啡")
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coffee = Coffee("美式", 10.0)
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coffee.cost()
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print("\n用咖啡机泡杯咖啡")
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new_coffee = Maker(coffee, milk_price=1.0, sugar_price=1.0)
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new_coffee.cost()
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print("\n=========== 装饰器模式结束 ===========")
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