python----特性003

#!/usr/local/bin/python3.5

class MyNumber(object):
def __init__(self,number):
self.number=number
def get_number(self):
####对于返回值可以有计算
return self.number*2
def set_number(self,number):
self.number=number
def del_number(self):
del self.number
Number=property(get_number,set_number,del_number,'Number property ...')

if __name__=="__main__":
n=MyNumber(100)
print(n.Number)