>[success] # property 修飾的方法 ~~~ 1.第一種方法案例一，當繼承setter或者deleter 修飾的方法子類使用super時候，里面兩個參數填寫子類的類 名，然后繼承的 屬性名字，后面接著對應的魔法方法，例如super(SubPerson, SubPerson).name.__set__(self, value) 2.如果直接不使用下面的第二個案例模式去定義，或是不像第一個全部重寫，就會出現異常錯誤例如案例三 ~~~ >[danger] ##### 案例 ~~~ class Person: def __init__(self, name): self.name = name # Getter function @property def name(self): return self._name # Setter function @name.setter def name(self, value): if not isinstance(value, str): raise TypeError('Expected a string') self._name = value # Deleter function @name.deleter def name(self): raise AttributeError("Can't delete attribute") class SubPerson(Person): @property def name(self): print('Getting name') return super().name @name.setter def name(self, value): print('Setting name to', value) super(SubPerson, SubPerson).name.__set__(self, value) @name.deleter def name(self): print('Deleting name') super(SubPerson, SubPerson).name.__delete__(self) s = SubPerson('Guido') print(s.name) ~~~ >[danger] ##### 如果只想擴展其中的一個方法 ~~~ class SubPerson(Person): @Person.name.getter def name(self): print('Getting name') return super().name ~~~ 或者，你只想修改setter方法，就這么寫： ~~~ class SubPerson(Person): @Person.name.setter def name(self, value): print('Setting name to', value) super(SubPerson, SubPerson).name.__set__(self, value) ~~~ >[danger] ##### 直接定義報錯 ~~~ class SubPerson(Person): @property # Doesn't work def name(self): print('Getting name') return super().name ~~~ 如果你試著運行會發現setter函數整個消失了： ~~~ >>> s = SubPerson('Guido') Traceback (most recent call last): File "<stdin>", line 1, in <module> File "example.py", line 5, in __init__ self.name = name AttributeError: can't set attribute >>> ~~~