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  1. class at_time:
  2.     actions = {}
  3.  
  4.     def __init__(self, time_of_day):
  5.         self.time_of_day = time_of_day
  6.  
  7.     def __call__(self, func):
  8.         self.actions.setdefault(func.__qualname__, {})[self.time_of_day] = func
  9.         return self
  10.  
  11.     def __set_name__(self, owner, name):
  12.         self.name = name
  13.         for time_of_day, func in self.actions.pop(
  14.                 '.'.join((owner.__qualname__, name))).items():
  15.             setattr(owner, f'_{name}_{time_of_day}', func)
  16.  
  17.     def __get__(self, obj, objtype):
  18.         def wrapper(time_of_day):
  19.             try:
  20.                 return getattr(obj, f'_{self.name}_{time_of_day}')()
  21.             except AttributeError:
  22.                 raise ValueError(f'No {self.name} found in the {time_of_day} time')
  23.         return wrapper
  24.  
  25. class PersonalChef():
  26.     @at_time('morning')
  27.     def cook(self):
  28.         print("Cooking breakfast")
  29.  
  30.     @at_time('evening')
  31.     def cook(self):
  32.         print("Cooking dinner")
  33.  
  34. class PersonalChefUK(PersonalChef):
  35.     @at_time('evening')
  36.     def cook(self):
  37.         print("Cooking supper")
  38.  
  39. PersonalChef().cook('morning')
  40. PersonalChef().cook('evening')
  41. PersonalChefUK().cook('morning')
  42. PersonalChefUK().cook('evening')
Success #stdin #stdout 0.04s 9596KB
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Cooking breakfast
Cooking dinner
Cooking breakfast
Cooking supper
https://ideone.com/Mvg2My
language:
Python 3 (python  3.12)
created:
1 year ago
visibility:
secret

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