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  1. class BaseRegistry:
  2.     registered = {}
  3.  
  4.     @classmethod
  5.     def add(cls, name):
  6.         def decorator(function):
  7.             cls.registered[name] = function
  8.             return function
  9.  
  10.         return decorator
  11.  
  12.     def __new__(cls, name):
  13.         return cls.registered[name]
  14.  
  15.     def __init_subclass__(cls):
  16.         cls.registered = {}
  17.  
  18.  
  19. class RegistryOne(BaseRegistry):
  20.     pass
  21.  
  22.  
  23. class RegistryTwo(BaseRegistry):
  24.     pass
  25.  
  26.  
  27. @RegistryOne.add("the_one")
  28. class Example1:
  29.     def __init__(self, scale_factor=1):
  30.         self.scale_factor = scale_factor
  31.  
  32.  
  33. @RegistryOne.add("the_two")
  34. class Example2:
  35.     def __init__(self, scale_factor=2):
  36.         self.scale_factor = scale_factor
  37.  
  38.  
  39. if __name__ == "__main__":
  40.     the_one = RegistryOne("the_one")()
  41.     print(f"{the_one.scale_factor=}")
  42.  
  43.     assert RegistryOne.registered != RegistryTwo.registered
Success #stdin #stdout 0.04s 9596KB
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the_one.scale_factor=1
https://ideone.com/6SaHG3
language:
Python 3 (python  3.12)
created:
1 year ago
visibility:
secret

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