say I have this list:
li = [["0", "20", "ar"], ["20", "40", "asdasd"], ["50", "199", "bar"], ["24", "69", "sarkozy"]]
Now, forget about the numbers, they are something that let me recognize the position of string. So basically, given that I have the string "ar" in hand, how can I extract all the lists that contain "ar"?
new_li = [["50", "199", "bar"], ["24", "69", "sarkozy"]]
How can I obtain this list?
>>> [x for x in li if 'ar' in x[2]]
[['0', '20', 'ar'], ['50', '199', 'bar'], ['24', '69', 'sarkozy']]
来源：https://stackoverflow.com/questions/6889785/python-how-to-search-an-item-in-a-nested-list