物件導向——property裝飾器

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property裝飾器

property裝飾器的作用，其實就是將將函數屬性偽裝成為屬性的的裝飾器

class People:    def __init__(self,name,weight,height):        self.name = name        self.weight =weight        self.height=height    @property    def bmi(self):        return self.weight/(self.height**2)msj = People(‘msj‘,82,1.84)print(msj.bmi)#24.22022684310019

但是這這隻是偽裝成屬性的，修改並不像屬性一樣能被修改

解決方案一：

class People:    def __init__(self,name,weight,height):        self.name = name        self.__weight =weight        self.__height=height    #介面顯示身高    @property    def height(self):         print(self.__height)    #介面修改身高屬性    @height.setter    def height(self,h):        self.__height = h    #介面刪除身高屬性    @height.deleter    def height(self):        del self.__heightp2 = People(‘egon‘,70,182)p2.heightp2.height=183p2.heightdel p2.heightprint(p2.__dict__)“”“182183{‘name‘: ‘egon‘, ‘_People__weight‘: 70}”“”

方案二

class People:    def __init__(self,name,weight,height):        self.name = name        self.__weight =weight        self.__height=height    #介面顯示身高    def tell_height(self):         print(self.__height)    #介面修改身高屬性    def set_height(self,h):        self.__height = h    #介面刪除身高屬性    def del_height(self):        del self.__height    height = property(tell_height,set_height,del_height)p2 = People(‘egon‘,70,182)p2.heightp2.height=183p2.heightdel p2.heightprint(p2.__dict__)

 

物件導向——property裝飾器