python购物车demo

product_list = [
        (‘Iphone‘,11800),
        (‘Mac Pro‘,13800),
        (‘BMW CAR‘,480000),
        (‘Watch‘,10600),
        (‘Coffee‘,31),
        (‘fatyao Python book‘,35),
]
shopping_list = []
salary = input("Input your salary:")
if salary.isdigit():
    salary = int(salary)
    while True:
          for index,item in enumerate(product_list):
               #print(product_list.index(item),item)
               print(index,item)
          user_choice = input("请选择要购买的商品？>>>:")
          if user_choice.isdigit():
               user_choice = int(user_choice)
               if user_choice < len(product_list) and user_choice >=0:
                    p_item = product_list[user_choice]
                    if p_item[1] <= salary: #买的起            
                         shopping_list.append(p_item)
                         salary -= p_item[1]
                         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，请及时充值\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")

原文地址：https://www.cnblogs.com/fatyao/p/10147029.html