第二题

import hashlib
db = {
    'michael': 'e10adc3949ba59abbe56e057f20f883e',
    'bob': '878ef96e86145580c38c87f0410ad153',
    'alice': '99b1c2188db85afee403b1536010c2c9'
}
def register(username,password):
    db[username]=get_md5(password+username+'the-Salt')
def get_md5(password):
    a=hashlib.md5()
    a.update(password.encode('utf-8'))
    return a.hexdigest()
def login(username,password):
    return db[username]==get_md5(password+username+'the-Salt')
register('root','root')
if login('root','root'):
    print('登录成功！')
else:
    print('登录失败！')