1 import time as t 2  3 class Record: 4     def __init__(self,value= None,name = None): 5         self.value = value 6         self.name = name 7  8     def __get__(self,instance,owner): 9         with open('D://record.txt','a') as f:10             f.write('%s变量于北京时间%s被读取,%s = %d'%\11                     (self.name,t.ctime(),self.name,self.value)12 13         return self.value14 15     def __set__(self,instance,value):16         self.value = value17         with open('D://record.txt','a') as f:18             f.write('%s变量于北京时间%s被修改,%s = %d'%\19                     (self.name,t.ctime(),self.name,self.value)  20 21         22 class Test:23     x = Record(10,'x')24     y = Record(8,'y')