cesarkawakami · January 19, 2015 13:28
diff --git a/x.py b/x.py
 with open("right_file.txt", "r") as f:
    right_set = set(f.read().split())
    
 with open("left_file.txt", "r") as f:
    for line in f:
        if line.strip() not in right_set:
            print line.strip()
	with open("right_file.txt", "r") as f:
	right_set = set(f.read().split())

	with open("left_file.txt", "r") as f:
	for line in f:
	if line.strip() not in right_set:
	print line.strip()