python第一天作业：用户登陆

作业二：编写登陆接口

• 输入用户名密码
• 认证成功后显示欢迎信息
• 输错三次后锁定

#!/usr/bin/env python3


import  sys
account_file = 'a.txt'
locked_file = 'b.txt'

def deny_account(username):
    print("user is locked!")
    with open(locked_file,'a+') as  lff:
        lff.readlines(username,'
')

def main():
    try_count = 0
    try_limit = 3
    while try_count < try_limit:
        username = input("pls input your name:")
        with open(locked_file,'r') as lf:
            for line in lf.readlines():
                if len(line) == 0:
                    continue
                if username == line.strip():
                    sys.exit("your user %s is out" % username)
        if len(username) == 0:
            print("not allow empty!")
            continue
        password = input("pls input password:")
        with open(account_file,'r') as af:
            flag = False
            for line in af.readlines():
                user,passwd = line.strip().split()
                if username == user and password == passwd :
                    flag =True
                    print("succes！")
                    break
            if flag == False:
                if try_count <2:
                    print("user or passwd error!")
                    try_count +=1
            else:
                print("welcome")
                break

    else:
        deny_account(username)

if __name__ == '__main__':
    main()