Python面向对象的类的操作

import random
import time

class ElectronicCoupon():
    def __init__(self):
        self.__ecid=time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))
        self.__ecprice=None
        self.__validity=None
        self.__passcode=None

        @property
        def ecid(self):
            return self.__ecid
        @ecid.setter
        def ecid(self,value):
            self.__ecid=value
        @ecid.getter
        def ecid(self):
            return self.__ecid

        @property
        def ecprice(self):
            return self.__ecprice
        @ecprice.setter
        def ecprice(self, value):
            self.__ecprice = value
        @ecprice.getter
        def ecprice(self):
            return self.__ecprice

        @property
        def validity(self):
            return self.__validity
        @validity.setter
        def validity(self, value):
            self.__validity = value
        @validity.getter
        def validity(self):
            return self.__validity

        @property
        def passcdoe(self):
            return self.__passcode
        @passcdoe.setter
        def passcode(self, value):
            self.__passcode = value
        @passcdoe.getter
        def passcode(self):
            return self.__passcode

    def shengcheng(self):
        print('电子券生成')
        a=[]  #四位领取码
        ecprice = input('请输入抵券面值:')
        validity = input('请输入有效期:')
        self.__ecprice=ecprice
        self.__validity=validity
        if self.__ecprice!='' and self.__validity!='':
            asc="1234567890qwertyuiopasdfghjklzxcvbnm"
            for i in range(4):
                a.append(random.choice(asc))
            passcode=''.join(a)
        self.__passcode=passcode
        print('验证码为:%s'%self.__passcode)
        #print(self.__passcode)
        print('*'*25)

    def lingyong(self):
        print('电子券领用')
        count=1
        while count<4:
            count+=1
            num = (input('请输入电子券领用码:'))
            if num!='':
                if num==self.__passcode:
                    print('200:验证通过')
                    print('电子券的编号为:%s' % self.__ecid)
                    print('电子券的面值为:%s' % self.__ecprice)
                    print('电子券的有效期为:%s' % self.__validity)
                    exit()
                else:
                    print('202:验证失败')
                    #exit()

if __name__=='__main__':
    obj = ElectronicCoupon()
    #obj.ecprice=input('请输入抵券面值:')
    #obj.validity=input('请输入有效期:')
    obj.shengcheng()
    obj.lingyong()