import hashlibdef md5(arg):#这是加密函数    md5_pwd = hashlib.md5(bytes('meac',encoding='utf-8'))    md5_pwd.update(bytes(arg,encoding='utf-8'))    return md5_pwd.hexdigest()#返回加密的数据def log(user,pwd):    try:        with open('login','r',encoding='utf-8') as f:            for line in f:                u,p=line.strip().split('|')                if u ==user and p == md5(pwd):#登陆的时候验证用户名以及加密的密码跟之前保存的是否一样                    return True                return  False    except:        return  Falsedef register(user,pwd):#注册的时候把用户名和加密的密码写进文件，保存起来    with open('login','a',encoding='utf-8') as f:        temp = user+'|'+md5(pwd)        f.write(temp)while 1:    m=input('请您输入序号：1。代表登录，2.代表注册')    if m=='1':        user=input('请输入登录账号:')        pasw=input('请输入登录账号密码：')        if log(user,pasw) ==False:            print('登录失败，系统推出')            break        else:            print('登录成功')    elif m=='2':        user = input('请输入注册账号:')        pasw = input('请输入注册账号密码：')        register(user,pasw)        print('注册成功')    else:        print('不存在你要的功能')        break