In [125]: from abc import ABC, abstractmethod
     ...: class C(ABC):
     ...:     def __init__(self):
     ...:         self._x = None
     ...:     @property
     ...:     def x(self):
     ...:         """I'm the 'x' property"""
     ...:         return self._x
     ...:     @x.setter
     ...:     @abstractmethod
     ...:     def x(self, value):
     ...:         self._x = value
     ...:     @x.deleter
     ...:     def x(self):
     ...:         del self._x
     ...: class D(C):
     ...:     pass