定义账号列表信息

userlist = [
{"name": "zhangsan", "password": 562390, "money": 500},
{"name": "lisi", "password": 123456, "money": 1000},
{"name": "wangwu", "password": 897456, "money": 2000}
]

#确认用户登录
def UserLogin(username, pwd):

for i in range(len(userlist)):
    if userlist[i]['name'] == username and userlist[i]['password'] == pwd:
        print("登录成功！")
    else:
        print("用户不存在！")

初始页面

while True:
print("欢迎进入中国银行")
print("1. 登陆", "2. 退出", "3.存钱", "4.取钱", "5.查询")
key = input("请输入选择:")
# 根据key进行判断
if key == "1":
username = input("请输入账户:")
pwd = input("请输入密码:")
UserLogin(username, pwd)
input("按回车键继续:")

    #问题：定义账号列表信息，输入用户名密码后，总是提示用户不存在。

def UserLogin(username, pwd):
for i in range(len(userlist)):
if userlist[i]['name'] == username and userlist[i]['password'] == pwd:
return 1
while True:
print("欢迎进入中国银行")
print("1. 登陆", "2. 退出", "3.存钱", "4.取钱", "5.查询")
key = input("请输入选择:")
# 根据key进行判断
if key == "1":
username = input("请输入账户:")
pwd = input("请输入密码:")
if UserLogin(username, int(pwd))==1:
print('登陆成功')
else:
print('登陆失败')
input("按回车键继续:")

        特地调试了一下，望采纳！