shopping

product_list = [
    ('Iphone',5800),
    ('Mac Pro',9800),
    ('Bike',800),
    ('Watch',10600),
    ('Coffee',34),
    ('Alex Python',120)
]
shopping_list = []
while True:
    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("请选择要购买的物品编号！退出请按q:")    
            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:  
                        shopping_list.append(p_item) 
                        salary -= p_item[1]        
                        print("Added \033[36;1m%s\033[0m 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，还买个毛线啊\033[0m" % salary)    
                else:
                    print("\033[35;1m product code [%s] is not exist!\033[0m" % 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")
    else:
        print("Please enter a number!!!")