python day6

简单购物

li = ['手机', '电脑', '鼠标垫', '游艇']
li2 = []
while 1:
    for i in li:
        print('{}\t\t\t{}'.format(li.index(i)+1, i))
    num = input('请输入商品序号,如需退出请按‘Q’：')
    if num.upper() == 'Q':
        break
    elif num.isdigit() and int(num) <= (li.index(i)+1):
        li2.append(li[int(num)-1])
        for i in li2:
            print(i)
    else:
        print("请输入正确的商品编号")