@property 用法

import datetimeimport time

class PK(object):    def __init__(self,name,attack=0.0,defence=0.0):        self.name = name        self.attack = attack        self.defence = defence        self._obtain_time = datetime.datetime.now()

@property    def defence(self):        return self._defence

@defence.setter    def defence(self,value):        if value < 0 :            print("防御值小于0设置为0")            self._defence = 0        elif value > 1000:            print("防御值大于1000被设置为1000")            self._defence = 1000        else:            self._defence = value

@property    def age(self):        return (datetime.datetime.now() - self._obtain_time).seconds

a = PK("铠甲",defence=10000)print(a.defence)a.defence = -100print(a.age)time.sleep(1)print(a.age)

@property 是把方法变为属性，_one_underline 标识这个是私有不应该直接被访问，不属于API，但可以通过defence 这个实例属性来访问  

原文地址：https://www.cnblogs.com/wudeng/p/9299377.html