Python编程修改MP3文件名称的方法

ModifyMp3FileInfo(r'E:/音乐/12345.mp3')

#!修改下载的Mp3文件名称为正确的Mp3文件
 def ModifyMp3FileInfo(filename):
   mp3Id3V1 = {
     "tag":{"valuepos":(0,3),"value":""},
     "SongName":{"valuepos":(3,33),"value":""},
     "SongPeople":{"valuepos":(33,63),"value":""},
     "Zj":{"valuepos":(63,93),"value":""},
     "Year":{"valuepos":(93,97),"value":""},
     "Bak":{"valuepos":(97,125),"value":""}
     }
   try:
     f = open(filename,'rb')
     f.seek(-128,2)
     sdata = f.read(3)
     if sdata == 'TAG':
       f.seek(-128,2)
       sdata = f.read(128)
       for tag,subitem in mp3Id3V1.items():
         subitem["value"] = sdata[subitem["valuepos"][0]:subitem["valuepos"][1]].replace('/00','').strip()
         print '%s='%tag,'%s'%subitem["value"],'/n'
       f.close()
       import os
       if mp3Id3V1["SongName"]["value"]!='':
         test = [os.path.dirname(filename),'//']
         test.append(mp3Id3V1["SongName"]["value"])
         test.append('.mp3')
         newfilename = ''.join(test)
         print newfilename
         if os.path.exists(newfilename):
           test = ['Filename ',newfilename,' Has Existed']
           print ''.join(test)
         else:
           try:
             os.rename(filename,newfilename)
           except WindowsError,e:
             if e.winerror:
               print 'Modify filename failed ,maybe the file is inuse'
             else:
               print 'UnKnown error'
     else:
       print 'Is not a MP3 file'
   except IOError:
     print 'Open file failed'