win 系统下，python3+环境，在调用一个列表的值时，执行后报错信息如下  
Traceback (most recent call last):   

File "H:/Python培训/2017-09-19/shopping car.py", line 26, in <module>  
 
if user_password == user_password_list(user_list.index(user_name)):   

TypeError: 'list' object is not callable