Python作业之三次登录

d:\\consumer_login.txt
zhangsan:123
wangwu:a324
lisi:li123

accountlist = []
pwdlist= []
blacklist = []
sign =True
while sign:
    username = input("亲输入用户名:")
    #读取账户和密码
    with open("d:\\consumer_login.txt",mode="r+",encoding="utf-8") as fp:
        lst=fp.readlines()
        for i in lst:
            user,password = i.strip().split(":")
            #把账号添加到accountlist
            accountlist.append(user)
            # 把密码添加到accountlist，账号和密码的索引是一一对应的
            pwdlist.append(password)
        #判断该用户是否在当前用户列表
        if username in accountlist:
            #打开黑名单用户
            with open("black.txt", mode="r+", encoding="utf-8") as fp:
                lst=fp.readlines()
                for i in lst:
                    #把黑名单用户添加到黑名单列表
                    blacklist.append(i.strip())
            #判断该用户是否被冻结
            if username in blacklist:
                print("该账户已被冻结")
            else:
                num = accountlist.index(username)
                #通过对应下标拿到密码
                pwd_true=pwdlist[num]
                times=0
                while times<3:
                    pwd2=input("请输入密码:")
                    if pwd_true == pwd2:
                        print("登陆成功")
                        #终止外层循环
                        sign=False
                        #终止当前循环
                        break
                    else:
                        print("抱歉，密码错了你还剩下%s次机会"%(2-times))
                        if times==2:
                            print("抱歉，该账户已被冻结，请联系管理员")
                            #把当前用户加入黑名单
                            with open("black.txt",mode="a+",encoding="utf-8") as fp:
                                strvar=username+"\n"
                                fp.write(strvar)
                    times+=1
        else:
            print("当前用户不存在")