python 購物車

要求實現功能：
啓動程序後，用戶輸入工資，而後打印商品列表
容許用戶根據商品編號購買商品
用戶選擇商品後，檢測餘額是否夠，夠就直接扣款，不夠就提醒
可隨時退出，退出時， 打印已購買商品和餘額

product_list = [ ('iphone', 8100),
                 ('mac pro', 13000),
                 ('sea food', 600),
                 ('bed', 3200),
                 ('chair', 123),
                 ('blue tooth header', 1800)


]

shopping_list = []
salary = input("please input your salary here: ")
if salary.isdigit():                    #判斷工資是否是數字
    salary = int(salary)                #工資是數字，把salary類型變成int
    while True:                         #進入循環
        for index, item in enumerate(product_list):
             print(index, product_list)

        user_choice = input("please put number to choice what you want>>>>>>:")
        if user_choice.isdigit():          #判斷用戶輸入必須是數字
           user_choice = int(user_choice)
           if user_choice < len(product_list) and user_choice >= 0:    #用戶選擇的數字小於product list長度 且大於等於0
               p_item = product_list[user_choice]

               if p_item[1] <= salary:
                   shopping_list.append(p_item)  #shopping list 裏增長該item
                   salary -= p_item[1]         #購買物品後在工資里扣除相應的錢
                   print("you have added %s into your shopping cart, and your current balance is: \033[31;1m%s\033[0m" %(p_item,salary))
    # \033[31;1m%s\033[0m   字體顏色改爲紅色
               else:
                   print("\033[31;1m you don't have enough salary!\033[0m")
           else:
               print("%s is no exist option!" %user_choice)


        elif user_choice == 'q':
            print("----------------your shopping list---------------")
            for p in shopping_list:
                print(p)
            print(" your current balance is:", salary)
            exit()
        else:
            print("invalid option")

使用 for index, item in enumerate(product_list)使 product_list更加靈活，後期可增長刪除裏面元素而且不影響原有代碼
注： 在list打印出來的時候是這樣的：（還沒有解決）

0 [('iphone', 8100), ('mac pro', 13000), ('sea food', 600), ('bed', 3200), ('chair', 123), ('blue tooth header', 1800)]
1 [('iphone', 8100), ('mac pro', 13000), ('sea food', 600), ('bed', 3200), ('chair', 123), ('blue tooth header', 1800)]
2 [('iphone', 8100), ('mac pro', 13000), ('sea food', 600), ('bed', 3200), ('chair', 123), ('blue tooth header', 1800)]
3 [('iphone', 8100), ('mac pro', 13000), ('sea food', 600), ('bed', 3200), ('chair', 123), ('blue tooth header', 1800)]
4 [('iphone', 8100), ('mac pro', 13000), ('sea food', 600), ('bed', 3200), ('chair', 123), ('blue tooth header', 1800)]
5 [('iphone', 8100), ('mac pro', 13000), ('sea food', 600), ('bed', 3200), ('chair', 123), ('blue tooth header', 1800)]

可是不影響購買