通过特定索引检查元组列表中是否存在字符串 [英] Check for the existence of a string in a list of tuples by specific index

问题描述

如果我有:

my_list = [('foo', 'bar'), ('floo', 'blar')]

如何轻松测试某个字符串是否在任何这些元组的第一个元素中?

how can I easily test if some string is in the first element in any of those tuples?

类似:

if 'foo' in my_list

我们只是检查列表中每个元组的第一个元素?

where we are just checking the first element of each tuple in the list?

推荐答案

如果你只想检查每个元组中的第一项:

If you want to check only against the first item in each tuple:

if 'foo' in (item[0] for item in my_list)

或者:

if any('foo' == item[0] for item in my_list)

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