day2-购物车

product_list = [('iphone',8000),
                ('book1',200),
                ('cup',1000),
 ('bike',2000),
 ('watch',5000),
 ('Macbook',12000)]
shopping_list = []
while True:
 salary = input("请输入您的预算：")
 if salary.isdigit():
 salary = int(salary)
 while True:
 for index, i in enumerate(product_list):
 print(index, i)
 user_choice = input("选择商品序号或输入Q退出：")
 if user_choice.isdigit():
 user_choice = int(user_choice)
 if user_choice < 6 and user_choice >=0:
 p_item = product_list[user_choice]
 if p_item[1] < salary:
 salary -= p_item[1]
 shopping_list.append(p_item)
 print("Add %s into shoppingl_list,your current balance is \033[31;1m%s\033[0m"%(p_item,salary))
 else:
 print("您的预算不足，请充值！")
 else:
 print("商品不存在")
 elif user_choice == "Q":
 print("-----shopping_list-----")
 for p in shopping_list:
 print(p)
 print("Your current balance is %s"%salary)
 exit()
 else:
 print("invalid option")
 else:
 print("请重新输入")