Python：设计模式之工厂模式

# -*- coding: utf-8 -*-
from abc import ABC, abstractmethod
class Animal(ABC):
    @abstractmethod
    def say_hi(self):
        pass
class Dog(Animal):
    def say_hi(self):
        print("汪汪汪...")
class Cat(Animal):
    def say_hi(self):
        print("喵喵喵...")
class Factory(object):
    def make_sound(self, animal):
        eval(animal)().say_hi()
if __name__ == '__main__':
    factory = Factory()
    factory.make_sound("Dog")
    factory.make_sound("Cat")
    """
    汪汪汪...
    喵喵喵...
    """

# -*- coding: utf-8 -*-
from abc import ABC, abstractmethod
# 组件部分
class Section(ABC):
    @abstractmethod
    def describe(self):
        pass
class PersonalSection(Section):
    def describe(self):
        print("PersonalSection")
class AlbumSection(Section):
    def describe(self):
        print("AlbumSection")
class PatentSection(Section):
    def describe(self):
        print("PatentSection")
class PublicationSection(Section):
    def describe(self):
        print("PublicationSection")
# 工厂部分
class Profile(ABC):
    def __init__(self):
        self.sections = []
        self.create_profile()
    @abstractmethod
    def create_profile(self):
        pass
    def show_sections(self):
        for section in self.sections:
            section.describe()
    def add_section(self, section):
        self.sections.append(section)
class LinkedIn(Profile):
    def create_profile(self):
        self.add_section(PersonalSection())
        self.add_section(PatentSection())
        self.add_section(PublicationSection())
class FaceBook(Profile):
    def create_profile(self):
        self.add_section(PersonalSection())
        self.add_section(AlbumSection())
if __name__ == '__main__':
    linkedin = LinkedIn()
    linkedin.show_sections()
    """
    PersonalSection
    PatentSection
    PublicationSection
    """
    facebook = FaceBook()
    facebook.show_sections()
    """
    PersonalSection
    AlbumSection
    """

# -*- coding: utf-8 -*-
from abc import ABC, abstractmethod
class FruitPizza(ABC):
    @abstractmethod
    def prepare(self):
        pass
class MeatPizza(ABC):
    @abstractmethod
    def serve(self):
        pass
class ApplePizza(FruitPizza):
    def prepare(self):
        print("ApplePizza")
class PeachPizza(FruitPizza):
    def prepare(self):
        print("PeachPizza")
class PorkPizza(MeatPizza):
    def serve(self):
        print("PorkPizza")
class BeefPizza(MeatPizza):
    def serve(self):
        print("BeefPizza")
# 抽象工厂
class PizzaFactory(ABC):
    @abstractmethod
    def create_meat_pizza(self):
        pass
    @abstractmethod
    def create_fruit_pizza(self):
        pass
class IndianPizzaFactory(PizzaFactory):
    def create_meat_pizza(self):
        return PorkPizza()
    def create_fruit_pizza(self):
        return ApplePizza()
class USPizzaFactory(PizzaFactory):
    def create_meat_pizza(self):
        return BeefPizza()
    def create_fruit_pizza(self):
        return PeachPizza()
class PizzaStore(object):
    def make_pizza(self):
        for factory in [IndianPizzaFactory(), USPizzaFactory()]:
            meat_pizza = factory.create_meat_pizza()
            fruit_pizza = factory.create_fruit_pizza()
            meat_pizza.serve()
            fruit_pizza.prepare()
if __name__ == '__main__':
    pizza_store = PizzaStore()
    pizza_store.make_pizza()
    """
    PorkPizza
    ApplePizza
    BeefPizza
    PeachPizza
    """