product_list = [

    ('iphone',5800),

    ('imac',15800),

    ('watch',9800),

    ('cloth',550),

    ('coffe latee',35),

    ('body call',200),

]

shopping_list = []

salary = input('please input your salary:').strip()

if salary.isdigit():

    salary = int(salary)

    while True:

        for index,item in enumerate(product_list):

            print(index,item)

        user_choice = input('please input your choice'.center(50,'*')).strip()

        if user_choice.isdigit():

            user_choice = int(user_choice)

            if 0 <= user_choice < len(product_list):

                buy_item = product_list[user_choice]

                if salary >= buy_item[1]:

                    shopping_list.append(buy_item)

                    salary -= buy_item[1]

                    print('you have put the \033[32;1m"%s" \033[0min your cast,your balance is\033[31;1m %d\033[0m'%(buy_item[0],salary))

                else:

                    print('\033[41;1mfuck off!!! you can`t afford it!!! your balance is %s !!!\033[0m'%(salary))

            else:

                print('product code [%s] is not exist!!!'%user_choice)

        elif user_choice == 'q' or user_choice == 'quit':

            print('you have buyed:'.center(50,'-'))

            print(shopping_list)

            exit()

        else:

            print('Invalid choice!!!')