>>> class pro():
def __init__(self):
'''初始化,步长,以及改变'''
self.l=0
self.h=0
self.s=self.l*self.h
def sety(self,key):
'''huode item'''
self.l,self.h=key
def gety(self):
return self.l,self.h,self.s
key=property(gety,sety)
>>> a=pro()
>>> a.key
(0, 0, 0)
>>> a.key=(12,13)
>>> a.key
(12, 13, 0)