python列表操作以比较元素的一部分而不是完整的元素

问题描述

我有两个列表，我只想处理部分不匹配的元素.

I have two lists and I want to process only the elements part of which do not match.

ListA = ['CAT.txt'，'CAT.txt.ext'，'DOG.txt'，'DOG.txt.ext'，'TIGER.txt.ext'，TIGER.txt']ListB = ['CAT_NEW.txt'，'CAT_NEW.txt.ext'，'TIGER_NEW.txt'，'TIGER_NEW.txt.ext']

ListA = ['CAT.txt','CAT.txt.ext','DOG.txt','DOG.txt.ext','TIGER.txt.ext',TIGER.txt']ListB = ['CAT_NEW.txt','CAT_NEW.txt.ext', 'TIGER_NEW.txt', 'TIGER_NEW.txt.ext']

列表B是列表A的子集，带有"_NEW"

List B is a subset of list A with "_NEW"

我想要的输出:ListC = ['DOG.txt'，'DOG.txt.ext']

Output I want: ListC = ['DOG.txt', 'DOG.txt.ext']

这是我遇到的另一个问题的解决方法:.检查了多个线程，但是.txt.ext很难拆分...

This is a work around for another question I had asked : Python: Trying to check if file exists and if not create new files and final output list . Checked multiple threads but the .txt.ext is hard to split on...

如图所示，如果我拆分了输入列表，则可以在不检查日志文件的情况下实现.

Figured if I split the input lists, I can implement without checking for the log file.

我检查了这个问题:

I checked this : Python: how to find the element in a list which match part of the name of the element

推荐答案

从 ListB 中移除字符串 '_NEW'，并使用 set 操作:

Remove the strings '_NEW' from the ListB, and use set operation:

In [1]: ListA = ['CAT.txt','CAT.txt.ext','DOG.txt','DOG.txt.ext','TIGER.txt.ext','TIGER.txt']                                 

In [2]: ListB = ['CAT_NEW.txt','CAT_NEW.txt.ext', 'TIGER_NEW.txt', 'TIGER_NEW.txt.ext']                                       

In [3]: lb= [ s.replace("_NEW","") for s in ListB ]                                                                           

In [4]: lb                                                                                                                    
Out[4]: ['CAT.txt', 'CAT.txt.ext', 'TIGER.txt', 'TIGER.txt.ext']

In [5]: list(set(ListA)-set(lb))                                                                                              
Out[5]: ['DOG.txt', 'DOG.txt.ext']

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