1 # Author : Mamba

 2

 3 #python基础一之课后作业：编写登录接口

 4

 5 # 输入用户名密码

 6 # 认证成功后显示欢迎信息

 7 # 用户名3次输入错误后，退出程序

 8 # 密码3次输入错误后，锁定用户名

 9 print("------mamba_login------")

10 user = input("please input your username :")

11

12 pwd  = 0

13 user_count = 0

14 pwd_count =0

15 isEnd = False

16

17 while user_count  < 3 : #当输入的用户名数据小于3次时

18     if isEnd:

19         break

20     if user == "mamba":

21        pwd = input("please input your password :")

22        while pwd_count < 3:  #当输入的密码小于3次时

23            if pwd == "":

24                print("welcome mamba come back")

25                isEnd = True

26                break

27            else:

28                pwd_count += 1

29                if 3 != pwd_count:

30                     print('{0} {1} {2} {3}'.format('Password  is wrong!!!', 'you have', (3 - pwd_count), 'chances.'))

31                     pwd = input("please input your password again:")

32     else:            #当用户名不对

33        user_count += 1

34        if 3 != user_count:

35              print('{0} {1} {2} {3}'.format('Username  is wrong!!!', 'you have', (3 - user_count), 'chances.'))

36              user = input("please input your username again: ")

37 if user_count > 3 or pwd_count > 3 or isEnd == False :  #当用户名或密码的次数超过3次

38     print("Wrong!!sorry.")

39     print("you have tried too many times ,game over")