Python comparing two files partially -

Python comparing two files partially -

i have 2 input file:

input 1:

okay sentence 2 runway 3 runway right runway 1 pathway

four pathway 0 pathway

input 2 :

okay sentence 2 runway 3 runway right runway 0 pathway

one pathway 4 pathway

i have used next code:

def diff(a, b): y = [] x in a: if x not in b: y.append(x) else: b.remove(x) homecoming y open('output_ref.txt', 'r') file1: open('output_ref1.txt', 'r') file2: same = diff(list(file1), list(file2)) print same print "\n" if '\n' in same: same.remove('\n') open('some_output_file.txt', 'w') fo: line in same: fo.write(line)

and expected output :

one pathway

zero pathway

but output getting empty output this. problem don't know how store content files list partially ,then compare , read there. can help me in regard ??

it seems if want have mutual text lines in both files, sets provide way. this:

content1 = set(open("file1", "r")) content2 = set(open("file2", "r")) diff_items = content1.difference(content2)

update: question difference in same sense diff utility? i.e. order of import (looks examples).

python