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")