问题描述
我有两个列表,一个包含相册,文件对的列表,另一个仅包含有关一张照片的信息-相册(在位置0)和文件(在位置1)
I have two lists, one containing lists of album, file pairs and the other containing only info about one photo - album (at position 0) and file (at position 1)
photos = [["Trip to Thailand", "IMG_001.jpg"], ["Latvia 2010", "IMG_001.jpg"]]
photo = ["Latvia 2010", "IMG_001.jpg"]
如何检查照片列表是否在照片列表中?类似于photo in photos
表示字符串.
How to check if photo list is in photos list? Similarly like photo in photos
for strings.
专辑 ,文件的位置无关紧要,因为不会有等于专辑的 file >.
Position of album, file doesn't matter since there won't be any file equal to album.
推荐答案
类似于photo in photos
字符串.不仅如此,完全一样. photo in photos
也适用于列表中的列表:
Similarly like photo in photos
for strings. Not just similarly, exactly like that. photo in photos
works for lists inside lists too:
>>> photos = [["Trip to Thailand", "IMG_001.jpg"], ["Latvia 2010", "IMG_001.jpg"]]
>>> photo = ["Latvia 2010", "IMG_001.jpg"]
>>> photo in photos
True
针对列表的成员资格测试仅对列表进行迭代,并对每个元素使用==
相等性测试以查看是否存在匹配项.您的photo
列表所测试的内容等于第二个元素:
Membership testing against a list simply iterates over the list and uses ==
equality testing with each element to see if there is a match. Your photo
list tests as equal to the second element:
>>> photos[1] == photo
True
因为两个列表中的所有字符串都相等.
because all strings in both lists are equal.
这篇关于检查列表是否在python中包含另一个列表的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!