import hashlib

md5 = hashlib.md5()

md5.update('123456'.encode('utf-8'))

print(md5.hexdigest())

#模拟用户登录

db= {}

def get_md5(str):

md5 = hashlib.md5()

md5.update(str.encode('utf-8'))

return md5.hexdigest()

def calc_md5(username,password):

return get_md5(username+password+'centanet')

def register(username,password):

db[username] = calc_md5(username, password)

def login(username,password):

pwd = db.get(username)

if not pwd:

print('user is not defind')

else:

if calc_md5(username, password) == pwd:

print('login success')

else:

print('login fail. may be password is error')

register('chens', '12345678')

login('chens', '12345678')

login('chens1', '12345')

login('chens', '1234')