python 遍历某个路径下的所有图片并将图片路径保存到数组

#!/usr/local/python2.7/bin/python2.7
# -*- coding: utf-8 -*-

import os

paths = ['/fdfs_data/data/', '/fdfs_data/data1/']

alist=[]
total = 0
for path in paths:
        for root, dirs, files in os.walk(path):
            for file in files:
                if file.endswith('jpg') or file.endswith('jpeg') or file.endswith('gif') or file.endswith('png') or file.endswith('bmp'):
                    if file not in file_list:
                        f = root + '/' + file

                            alist.append(f)