Question

使用描述符管理属性：

class Geeks:
    def __init__(self,value):
        self.age = value
    def __getattribute__(self,attr):
        return  object.__getattribute__(self,attr)
    def __setattr__(self,attr,value):
        return  object.__setattr__(self, attr,value)

初始化具有真实属性age10的Geeks类：

boy = Geeks(10)
boy.age
10
boy.__dict__
{ age : 10}

The instance boy contains a real attribute age.
In almost every book,use property class to mange the age attribute(some in the form of self.__age or self.age_ or self._age ,it does not matter):

class Geeks:
     def __init__(self,value):
          self._age = value  
     def get_age(self):
         return self._age       
     def set_age(self, value):
         self._age = value 
     age = property(get_age, set_age)

显示属性：

boy = Geeks(10)
boy.age
10
boy.__dict__
{ _age : 10}

真实属性是_age，而不是age。_ageage属性（get_age，set_age）创建真实的age属性时，我遇到了RecursionError。

class Geeks:
     def __init__(self,value):
          self.age = value  
     def get_age(self):
         return self.age       
     def set_age(self, value):
         return self.age = value 
     age = property(get_age, set_age)

相同错误：

class Geeks:
     def __init__(self,value):
          self.age = value  
     def get_age(self):
         return  object.__getattribute__(self, age )       
     def set_age(self, value):
         object.__setattr__(self,  age ,value)
     age = property(get_age, set_age)

如何使属性（get_age，set_age）创建真正的属性age，而不是_age或类似的属性？

Answer 1

class Geeks:
     def __init__(self,value):
         self.age = value  
     def get_age(self):
         return self.__dict__[ age ]       
     def set_age(self, value):
         self.__dict__[ age ] = value
     age = property(get_age, set_age)

类Geeks可以创建一个真实属性，属性名称与__dict__中的属性名称相同。

boy = Geeks(10)
in set
boy.age
in get
10
boy.__dict__
{ age : 10}

友情链接