继承与父类特化

huangapple
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英文:

inheritance with parent class specialization

问题

对不起，如果我很难理解，英语不是我的母语。

我正在尝试创建一个从专门化的父类派生的小狗类，但不知道它将继承哪个父类。同时，给小狗类提供一组要实现的抽象方法。

  1. from abc import ABC, abstractmethod
  3. class DogSkillSet(ABC):
  4.     @abstractmethod
  5.     def bark(self):
  6.         raise NotImplementedError
  8.     @abstractmethod
  9.     def chase(self):
  10.         raise NotImplementedError
  12.     @abstractmethod
  13.     def fetch(self):
  14.         raise NotImplementedError
  16. class Dog:
  17.     def __new__(cls, race, **kwargs):
  18.         if race == 'sheperd':
  19.             return GermanSheperd()
  20.         elif race == 'rott':
  21.             return Rottweiller()
  23. class GermanSheperd:
  24.     def __init__(self):
  25.         self.race = "sheperd"
  27. class Rottweiller:
  28.     def __init__(self):
  29.         self.race = "rott"
  31. class Puppy(Dog, DogSkillSet):
  32.     def __init__(self, race):
  33.         super().__init__(race)
  35.     def bark(self):
  36.         print("small woof")
  38.     def chase(self):
  39.         print("stare into the air")
  41.     def fetch(self):
  42.         print("stare into the air")
  44.     def play(self):
  45.         print('playing')
  47. if __name__ == '__main__':
  48.     my_dog = Puppy('berger')
  49.     my_dog.bark()

但在专门化之后继承不会发生。你能告诉我我做错了什么吗？

英文:

I'm sorry if I'm hard to understand, English is not my first language.

I'm trying to have a Puppy class derived from a specialize parent class, but without knowing which parent class it will inherit. And at the same time, give the Puppy class a set of abstract methods to implement.

  1. from abc import ABC, abstractmethod
  4. class DogSkillSet(ABC):
  5.     @abstractmethod
  6.     def bark(self):
  7.         raise NotImplementedError
  9.     @abstractmethod
  10.     def chase(self):
  11.         raise NotImplementedError
  13.     @abstractmethod
  14.     def fetch(self):
  15.         raise NotImplementedError
  18. class Dog:
  19.     def __new__(cls, race, **kwargs):
  20.         if race == 'sheperd':
  21.             return GermanSheperd()
  22.         elif race == 'rott':
  23.             return Rottweiller()
  26. class GermanSheperd:
  27.     def __init__(self):
  28.         self.race = "sheperd"
  31. class Rottweiller:
  32.     def __init__(self):
  33.         self.race = "rott"
  36. class Puppy(Dog, DogSkillSet):
  37.     def __init__(self, race):
  38.         super().__init__(race)
  40.     def bark(self):
  41.         print("small woof")
  43.     def chase(self):
  44.         print("stare into the air")
  46.     def fetch(self):
  47.         print("stare into the air")
  49.     def play(self):
  50.         print('playing')
  53. if __name__ == '__main__':
  54.     my_dog = Puppy('berger')
  55.     my_dog.bark()

But the inheritance doesn't happen after the specialization. Could you tell me what I am doing wrong.

答案1

得分: 1

以下是已翻译的内容：

你的 Dog.__new__，被 Puppy 继承，返回 GermanShepherd 或 Rottweiler 的实例，它们都不继承自 DogSkillSet（或者说不继承自 Dog）。

英文:

Your Dog.__new__ which is inherited by Puppy, returns instances of GermanShepherd or Rottweiler, neither of which inherit from DogSkillSet (or Dog for that matter)

huangapple
  • 本文由 发表于 2023年6月29日 23:23:48
  • 转载请务必保留本文链接：https://go.coder-hub.com/76582480.html
  • inheritance
  • python
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