Python Basic Learning 1-descriptors

#!/usr/bin/env python#-*-coding:utf-8-*-#描述符就是将某种特殊类型的类的实例指派给另一个类的属性 # Special type means implemented # __get__ (Self,instance,owner), # __ Set__ (Self,instance,value), # __delete__ (Self,instance) Three methods at least one class Mydecriptor: #描述符类 def __get__ (self, instance, Owner): Print ("__get__", self, instance, owner) def __set__ (self, instance, value): Print ("__set__", Self, instance, value) def __delete__ (self, Instance): Print ("__delete__", Self, Instance) class Test:x=mydecriptor ( ) t1= Test () print (t1.x) t1.x= "X-man" #===== instance the temperature conversion of Fahrenheit class Celsius:def __init__ (self,value=26) according to the set degree Celsius: self.        Value=value def __get__ (self, instance, owner): Return Self.value def __set__ (self, instance, value): Self.value = Valueclass fahrenheit:def __get__ (self, instance, owner): Return instance.cel*1.8+32 def __se    T__ (self, instance, value): instance.cel= (float) (value-32)/1.8class temperature: #温度类的两个属性分别设置的摄氏度标识符类和华氏度标识符类 Cel=celsius (Fah=fahrenheit)() tem = temperature () print (tem.cel) print (Tem.fah) 

Python Basic Learning 1-descriptors