python_30_购物车复习

prodcut_list=[
    ('Iphone', 5800),
    ('Mac Pro', 9800),
    ('Bike', 800),
    ('Watch', 10600),
    ('Coffee', 31),
    ('Python Book', 49)
]
shopping_list=[]
salary=int(input('Input your salary:'))
while True:
    for index,item in enumerate(prodcut_list):
        print(index,item)
    choice=input('>>>:选择要买嘛？>>>:')
    if choice.isdigit():
        choice=int(choice)
        if choice<len(prodcut_list) and choice>=0:
            p_item=prodcut_list[choice]
            if p_item[1]<salary:
                salary-=p_item[1]
                shopping_list.append(p_item)
                print("Added %s into your shopping cart,your current balance is 33[32;1m%d33[0m"%(p_item,salary))
            else:
                print("33[42;1m你的余额只有%d，还买个球呀33[0m"%salary)
        else:
            print("商品[%s]不存在"%choice)
    elif choice=='q':
        print('--------shoppinglist--------')
        for p in shopping_list:
            print(p)
        print("你的余额：",salary)
        exit()
    else:
        print('invalide option')