检查子列表是否包含项目 [英] Check if a sublist contains an item

问题描述

我有一个Python列表列表.如下图所示，我要检查子列表之一是否包含项.以下尝试失败.有谁知道一种简单的方法-没有我编写自己的for循环?

I have a list of lists in Python. As illustrated below, I want to check if one of the sublists contains an item. The following attempt fails. Does anyone know of a simple way -- without me writing my own for loop?

>>> a = [[1,2],[3,4],[5,6],7,8,9]
>>> 2 in a

我希望得到True，但返回的是False

I was hoping for True but the return was False

推荐答案

>>> a = [[1,2],[3,4],[5,6],7,8,9]
>>> any(2 in i for i in a)
True

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