Hi Everyone, I am a Biologist {NOT A PROGRAMMER} and trying to syntax my own code to find differences between my data files.

File1.txt: Orange, orange, apple, pear

File2.txt: pear, Pear, Kiwi

Output.txt: -Orange -Orange -apple -pear +pear +Pear +Kiwi

In this case lowercase "pear" is the only common fruit between my files and thus the output shows both +pear and -pear. But this is not extremely helpful because I want to use this code for really long gene lists. Is there some way to further filter the common fruit and display them for example without a "+" or "-" the output.txt. As this is not very helpful to have to go through what has + and - in a very big list full of duplicates.

this is my code:

>     import difflib
>     
>     with open('/Users/.../file1.txt') as file_1:file_1_text = file_1.readlines()
>     with open('/Users/.../file2.txt') as file_2:file_2_text = file_2.readlines()
>     
>     mfile = open('output.txt', 'w')    
>     
>     for line in difflib.unified_diff(file_1_text, file_2_text,fromfile='file1.txt',tofile='/Users/.../file2.txt',
> lineterm=''):    
>         mfile.write("%s\n" % line)    
>         print(line)