2018.09.20python作业

用户登入，永久锁定锁定，3次黑名单

name=input(‘please your name: ‘)
# pwd=input(‘please your password: ‘)
with open(‘黑名单.txt‘,mode=‘rt‘,encoding=‘utf-8‘) as a :##

    for msg in a:

        if name==msg.strip(‘\n‘):
            print(‘该用户已经被锁定‘)
            break

        with open("用户数据库.txt",mode=‘rt‘,encoding=‘utf-8‘) as b:
            for info in b:
                n,p=info.strip(‘\n‘).split(‘:‘)
                if name == n:
                    count=0
                    while True:
                        pwd = input(‘please your password: ‘)
                        if pwd==p:
                            print("login successful")
                            break
                        if count==2:
                            print(‘用户锁定‘)

                            with open(‘黑名单.txt‘,mode=‘at‘,encoding=‘utf-8‘)as x:
                                x.write(name)
                            break
                        else:
                            print("密码错误")
                            count+=1



    else:
        print("用户不存在")

2018.09.20python作业

原文：https://www.cnblogs.com/hello-yuanjing/p/9684028.html