购物车

product_list = [
    ("phone",6000),
    ("cup",80),
    ("coffee",30),
    ("computer",5000),
    ("tee",20),
]  #定义商品列表
shoppint_list = []   #定义购物车
salary = input("input you salay:")  #定义工资
if salary.isdigit(): #判断是不是整数
    salary = int(salary)
    while True:
         for item in enumerate(product_list):#取下标，商品编码
             print(item)

         user_choice = input ("选择要购买的商品>>>")
         if user_choice.isdigit():
             user_choice = int(user_choice)
             if user_choice <len(product_list) and user_choice >=0:  #商品编码号的长度
                 p_item = product_list[user_choice] #产品
                 if p_item[1] <= salary: #获取产品的价格<工资
                     shoppint_list.append(p_item) #把产品加入购物车
                     salary -= p_item[1]
                     print(" %s 已经加入购物车，现在的余额是 \033[31;1m%s\033[0m" %(p_item,salary))
                 else:
                     print("你的余额不足")

         elif user_choice == "q":
             print('----------shopping_list----------')
             for p in shoppint_list:
                 print(p)
             print("余额",salary)
             exit()
         else:
             print("invalid option")