使用hashlib进行登录校验 注册登录和密码验证

import hashlib     # 导入模块 
def md5(username,password):    #  加密函数
    md5 = hashlib.md5(username[::-1].encode('utf-8')) # 加盐加密，加密方式md5
    md5.update(password.encode('utf-8'))
    return md5.hexdigest()

def get_line():
    with open('userinfo', encoding='utf-8') as f:   #  登录验证
        for line in f:
            user, pwd = line.strip().split(',')
            yield user,pwd

def register():
    flag = True         # 账号注册函数
    while flag:
        username = input('user :')
        password = input('passwd :')
        for user,pwd in get_line():
            if user == username:
                print('您输入的用户名已经存在')
                break
        else:
            flag = False
    password = md5(username,password)
    with open('userinfo',encoding='utf-8',mode='a') as f:       #  文件写入
        f.write('%s,%s
'%(username,password))

def login():
    username = input('user :')
    password = input('passwd :')
    for user,pwd in get_line():　　　　　　　　# 登录验证，调用get_line函数
        if username == user and pwd == md5(username,password):
            return True


ret = login()
if ret:
    print('登陆成功')