简单登录注册 加三次验证

username= input('请输入你要注册的用户名：')
password= input('请输入你要注册的密码')
with open('list of info',mode='w',encoding='utf-8') as f:
    f.write('{}\n{}'.format(username,password))
print('恭喜您，注册成功')
i=0
lis=[]
while i<3:
    uname=input('请输入您的用户名')
    upass=input('请输入您的密码')
    with open('list of info', mode='r+', encoding='utf-8') as f:
        for line in f:
            lis.append(line)
    if uname==lis[0].strip() and upass==lis[1].strip():
        print('登录成功')
        break
    else:
        print('账号或密码错误')
    i+=1