通过特定索引检查元组列表中是否存在字符串
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?
解决方案
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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