账号登录系统

from_db_username = 'jason'
from_db_password = 123
i = 0
flag = True
while flag:
    while i < 3:
        username = input('请输入用户名：')
        password = int(input('请输入密码：'))
        if from_db_username == username and from_db_password == password:
            print('登录成功')
            flag = False
            break
        else:
            i += 1
            print('登录失败，您还有%s次机会' % (3 - i))
    else:
        answer = input('是否继续，是输入y，否输入q：')
        if answer == 'y':
            i = 0
        elif answer == 'q':
            break