如何實現Porperty裝飾器？

今天簡單的實現下Porperty裝飾器
demo:

class Porperty:
    def __init__(self, fget= None, fset= None, fdel = None):
        self.fget= fget
        self.fset = fset
        self.fdel = fdel
    def __get__(self, instance, cls):
        if instance is None:
            return self
        if not callable(self.fget):
            raise AttributeError
        return self.fget(instance)
    def __set__(self, instance, value):
        if not callable(self.fset):
            raise AttributeError
        return self.fset(instance, value)
    def __delete__(self, instance):
        if not callable(self.fdel):
            raise AttributeError
        return self.fdel(instance)
    def setter(self, fset):
        self.fset = fset
        return self.fset
    def deleter(self, fdel):
        self.fdel = fdel
        return self.fdel
class A:
    def __init__(self,x):
        self._x = x
    @Porperty
    def x(self):
        return self._x

a =A(4)
a.x
a.x = 123

class A:
    def __init__(self,x):
        self._x = x
    @Porperty
    def x(self):
        return self._x
    @x.setter
    def set_x(self, value):
        self._x = value
a = A(5)
a.x
a.x = 7