# Author：Zhangproduct_list =[    ('Iphone',5800),    ('Mac Pro', 9800),    ('Bike', 800),    ('Watch', 10600),    ('Coffee', 31),    ('Zhang Python', 120)]shopping_list =[]salary = input("Input your salary:")if salary.isdigit():    #判断是否是数字    salary =int(salary)    while True:                                        # index,item    带下标的列表        for index,item in enumerate(product_list):     #for item in product_list:     列表显示下标            print(index,item)                           #    print(product_list.index(item),item)        user_choice =input("选择你要购买的商品编号>>>:")        if user_choice.isdigit():            user_choice =int(user_choice)            if user_choice 
     
      =0:                p_item =product_list[user_choice]                if p_item[1]<= salary:  #买得起                    shopping_list.append(p_item)                    salary -= p_item[1]                                             #\033[31;1m%s\033[0m  高亮显示                    print("Added %s into shopping cart,your current balance is \033[31;1m%s\033[0m"%(p_item,salary))                else:                    print("\033[41;1m你的余额只剩[%s]啦，请留意！！！\033[0m"% salary)            else:                print("product code [%s] is not exist!"%user_choice)        elif user_choice=='q':            print("-----------Shopping List-------------")            for p in shopping_list:                print(p)            print("Your current balance:",salary)            exit()        else:            print("invalid option")