dicta={"姓名":"张三","卡号":"1001","密码":"2001","余额":100}
dictb={"姓名":"李四","卡号":"1002","密码":"2002","余额":500}
dictc={"姓名":"王五","卡号":"1003","密码":"2003","余额":1000}
list=[dicta,dictb,dictc]
msg=0 #用来记录登录状态，0失败，1成功
i=0
num=input("请输入卡号：")
code=input("请输入密码：")
while 1==1:
for x in list:
if num==x["卡号"] and code==x["密码"]:
msg=1
print("验证通过，欢迎您,",x["姓名"])
if msg==0:
i=i+1
if i==3:
print("您已错误三次，再见！")
break
else:
print("验证错误，请重新输入！您还有",3-i,"次机会")
continue
