Python - Compare 2 files and output differences

Question

I\'m aiming to write a script that will compare each line within a file, and based upon this comparison, create a new file containing the lines of text which aren\'t in the

Answer 1

This is working for me:

def compare(File1,File2):
    with open(File1,'r') as f:
        d=set(f.readlines())


    with open(File2,'r') as f:
        e=set(f.readlines())

    open('file3.txt','w').close() #Create the file

    with open('file3.txt','a') as f:
        for line in list(d-e):
           f.write(line)

You need to compare the readlines set and find out lines that are not present in file2. You can then append these lines to the new file.