登录验证，错误三次锁定帐号

Posted 2020-08-20 喻丰

需求：用户的登录验证，登录错误三次锁定用户，用户名和密码保存在文件中

编译环境：python3

 

流程图如下:

 

 

 

代码如下：

file = open(\'lock.txt\').readlines()
name = input("username:\\n>>").strip()
lock = []
for i in file:
    line = i.strip(\'\\n\')
    lock.append(line)
if name in lock:
    print(name, "已经被锁定")
else:
    i = 1
    while i <= 3:
        i += 1
        print(\'...........\')
        username = name
        print(username)
        password = input(\'password:\\n>>\').strip()
        f = open(\'user.txt\', encoding=\'utf-8\').readlines()
        login = False
        if len(username) != 0 and len(password) != 0:  # 判断是否为合法输入
            for line in f:
                if username == line.split()[0] and password == line.split()[1]:  # 用户名和密码匹配正确
                    print(\'欢迎登录\')
                    login = True
                    break
                else:
                    continue
        if login is False:
            print(u\'帐号或密码错误\')
        if login is True:
                    break
    else:
        f = open(\'lock.txt\', \'a\')
        f.write(name)
        f.write(\'\\n\')
        f.close()
        print(\'您的密码输入错误已达三次,帐号锁定，退出\')