if not compareLyx(lines1, lines2):
diff = difflib.unified_diff(lines1, lines2, lyxfile1, lyxfile2, t1, t2)
sys.stdout.writelines(diff)
if not compareLyx(lines1, lines2):
diff = difflib.unified_diff(lines1, lines2, lyxfile1, lyxfile2, t1, t2)
sys.stdout.writelines(diff)