python文件操作 （注册登录3次练习）

username = input(‘请输入你要注册的用户名‘)
password = input("请输入您用户名的密码")
with open(‘信息‘, mode=‘w‘, encoding=‘utf-8‘) as f:
    f.write(‘{}\n{}‘.format(username, password))
print(‘恭喜您注册完成‘)
li = []
i = 0
while i < 3:
    uname = input(‘请输入您的用户名‘)
    pword = input(‘请输入您的密码‘)
    with open(‘信息‘, mode=‘r+‘, encoding=‘utf-8‘) as f1:
        for line in f1:
            li.append(line)
            print(line)
    if uname == li[0].strip() and pword == li[1]:
        print(‘登录成功‘)
        break
    else:
        print(‘用户名或密码输入错误，请重新输入‘)
        i +=1