# -*- coding:utf-8 -*- import os def rename():     path = raw_input("请输入要处理的文件夹路径")     print path     old_ext = "."+raw_input("请输入要处理的文件类型")     print old_ext     new_ext = "."+raw_input("请输入你想变成的文件类型")     print new_ext     for (path, dirs, files) in os.walk(path):#遍历目录树         for filename in files:             ext = os.path.splitext(filename)[1] #取得文件类型，注意它还带着点号             print ext;             if(ext == old_ext):                 print "----------------"                 newname = filename.replace(old_ext, new_ext)                 oldpath = path + "\\" + filename                 newpath = path + "\\" + newname                 try:                     os.rename(oldpath, newpath)                 except BaseException, e:                    print(str(e)) if __name__ == '__main__':     rename()