图片压缩工具imageoptim在git的集成

#!/usr/bin/env python
#coding:utf-8
import sys,os,time,shutil
import urllib 
import urllib2
import zipfile
import tarfile
def un_tar(file_name):
    tar = tarfile.open(file_name)
    names = tar.getnames()
    if os.path.isdir(file_name + "_files"):
        pass
    else:
        os.mkdir(file_name + "_files")
    #因为解压后是很多文件，预先建立同名目录
    for name in names:
        tar.extract(name, file_name + "_files/")
    tar.close()
if os.path.exists('/Applications/ImageOptim.app') == False:
   print '下载'	
   un_tar('ImageOptim.tar')
   shutil.copytree('ImageOptim.tar_files/ImageOptim.app','/Applications/ImageOptim.app')
text = os.popen('find . -name *.png').read()
images = text.split('n')
imagepaths = ''
for x in xrange(1,200):
    image = images[x]
    if chr(32) in image:
       print '该文件不可用，请去除文件名字的空格' + image	
       continue
    imagepaths = imagepaths + ' ' + image
os.system('open -a ImageOptim ' + imagepaths)