Работа с файл-путями. Ищу ошибку

#! /usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import unicode_literals, print_function
import os
from datetime import datetime
 
path1= os.getcwd()
os.chdir('2016/')
path = os.getcwd()
dirs = os.listdir(".")
 
mp4 = filter(lambda x: x.endswith('.mp4'), dirs)
png = [y.split('.')[0] for y in filter(lambda x: x.endswith('.png'), dirs)]
order = filter(lambda x: not x.endswith('.png') and not x.endswith('.mp4'), dirs)
 
text = []
mp4_not_png = []
for mp in mp4:
    if mp.split('.')[0] in png:
        text.append(u'{0}\{1}.MP4 | {0}\{1}.png'.format(path, mp.split('.')[0]))
    else:
        mp4_not_png.append(mp)
 
os.chdir(path1)
file_date=datetime.strftime(datetime.now(), "%d_%m_%Y_%H-%M-%S")
file_name=file_date+'.txt'
new_file = open(file_name, "w")
new_file.write('\n'.join(text).encode("utf-8"))
new_file.close()
 
print(u'\nmp4 файлы без png:')
for m in mp4_not_png:
    print (m)
 
print(u'\nПрочие файлы:')
for ord in order:
    print (ord)
 
print(u'\nГотово')
input()

import os
import glob
 
mp4s = set(os.path.abspath(x).strip('.MP4') for x in glob.glob('test/*.MP4'))
pngs = set(os.path.abspath(x).strip('.png') for x in glob.glob('test/*.png'))
 
print(*("{}.MP4 |{}.png".format(x, x) for x in mp4s & pngs), sep='\n')