Python批量修改文件名-后缀

#Version: V1.0
#Author:lynclynn

#Description:Change the filename
#CreateDate:20151130

#UpdateDate:# -*- coding: UTF-8 -*-
import os
#列出当前目录(E:\Python\Code)下所有的文件
files =os.listdir("E:\Python\Code")#分离文件名字和后缀
for filename in files:
portion=os.path.splitext(filename)
print portion
#根据后缀来修改
if portion[1]==".py":
newname=portion[0]+".txt"
#切换文件路径
os.chdir("E:\Python\Code")
os.rename(filename,newname)