求助求助，这个怎么改？

userinfo={"user1":{"name":"admin","password":"123","sex":"F"},
"user2":{"name":"abc","password":"111","sex":"M"}}
list1=[]
list2=[]
for key1,value1 in userinfo.items():
list1.append(value1["name"])
list2.append(value1["password"])
print("会员管理系统登录界面".center(30,"="))
timesout=0
name=input("请输入用户的姓名：")
while timesout<4:
if not name in list1:
if timesout==3:
print("登录失败！")
break
print("用户不存在，请重新输入！")
timesout+=1
print("你还有%d次机会（共有四次机会）"%(4-timesout))
name=input("请输入用户的姓名：")
else:
pwd=input("请输入用户的密码：")
if (name==list1[0] and pwd==list2[0])or (name==list1[1]and pwd==list2[1]):
print("祝贺你登录系统成功！")
break
else:
if timesout==3:
print("登陆系统失败！")
break
print("密码不正确，请重新输入！")
timesout+=1
print("你还有%d次机会（共有四次机会）"%(4-timesout))