用户登录以及锁定

dic={'egon1':'123','egon2':'123','egon3':'123'}
tag=True
while True:
    name=input('输入用户名：')
    if name not in dic:
        print('用户名不存在')
        continue
    else:
        with open('db.txt','r') as p:
            lock_uesers=p.read().split('|')
            if name in lock_uesers:
                print('用户%s已经被锁定,'%name)
                continue
            else:
                x=0
                while tag:
                    sky = input('输入密码：')
                    if x==2:
                        print('用户锁定')
                        with open('db.txt','a') as p:
                            p.write('%s|'%name)
                            break
                    if sky == dic[name]:
                        print('登陆成功！')
                        break
                    else:
                        print('密码错误，请重新输入')
                        x+=1