\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\uff08Simple Factory Pattern\uff09\u662f\u4e00\u79cd\u521b\u5efa\u578b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u901a\u8fc7\u4e13\u95e8\u5b9a\u4e49\u4e00\u4e2a\u5de5\u5382\u7c7b\u6765\u8d1f\u8d23\u521b\u5efa\u5176\u4ed6\u7c7b\u7684\u5b9e\u4f8b\uff0c\u800c\u4e0d\u662f\u5728\u5ba2\u6237\u7aef\u4ee3\u7801\u4e2d\u76f4\u63a5\u5b9e\u4f8b\u5316\u5bf9\u8c61\u3002\u8fd9\u6837\u53ef\u4ee5\u5c06\u5bf9\u8c61\u521b\u5efa\u7684\u8fc7\u7a0b\u4e0e\u4f7f\u7528\u5bf9\u8c61\u7684\u8fc7\u7a0b\u5206\u79bb\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n\n\n\n
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\u5de5\u5382\u7c7b\uff08Factory\uff09\uff1a\u8d1f\u8d23\u521b\u5efa\u5bf9\u8c61\u7684\u7c7b\u3002\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\uff0c\u5b9e\u4f8b\u5316\u5e76\u8fd4\u56de\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\u3002
\u4ea7\u54c1\u7c7b\uff08Product\uff09\uff1a\u7531\u5de5\u5382\u521b\u5efa\u7684\u5bf9\u8c61\uff0c\u6240\u6709\u521b\u5efa\u7684\u5bf9\u8c61\u5e94\u5b9e\u73b0\u76f8\u540c\u7684\u63a5\u53e3\u6216\u7ee7\u627f\u76f8\u540c\u7684\u57fa\u7c7b\u3002
\u5ba2\u6237\u7aef\uff08Client\uff09\uff1a\u4f7f\u7528\u5de5\u5382\u7c7b\u6765\u83b7\u53d6\u4ea7\u54c1\u5bf9\u8c61\uff0c\u800c\u4e0d\u76f4\u63a5\u5b9e\u4f8b\u5316\u4ea7\u54c1\u7c7b\u3002
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class Animal:\n def speak(self):\n pass\n\nclass Dog(Animal):\n def speak(self):\n return \"Woof!\"\n\nclass Cat(Animal):\n def speak(self):\n return \"Meow!\"<\/code><\/pre>\n\n\n\n\u5b9a\u4e49\u5de5\u5382\u7c7b<\/p>\n\n\n\n
class AnimalFactory:\n @staticmethod\n def create_animal(animal_type: str) -> Animal:\n if animal_type == 'dog':\n return Dog()\n elif animal_type == 'cat':\n return Cat()\n else:\n raise ValueError(f\"Unknown animal type: {animal_type}\")\n<\/code><\/pre>\n\n\n\n\u4f7f\u7528\u5de5\u5382\u7c7b<\/p>\n\n\n\n
def main():\n factory = AnimalFactory()\n\n dog = factory.create_animal('dog')\n print(dog.speak()) # \u8f93\u51fa\uff1aWoof!\n\n cat = factory.create_animal('cat')\n print(cat.speak()) # \u8f93\u51fa\uff1aMeow!\n\n try:\n unknown = factory.create_animal('bird')\n except ValueError as e:\n print(e) # \u8f93\u51fa\uff1aUnknown animal type: bird\n\nif __name__ == \"__main__\":\n main()<\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
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\u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/blog.csdn.net\/weixin_55252589\/article\/details\/139070003<\/p>\n\n\n\n
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<\/p>\n","protected":false},"excerpt":{"rendered":"
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