Python修改Mp3文件名称

  网上下载的很多mp3歌曲，都是用的时间ID比如20091003003.mp3这样的方式作为歌曲名称的，非常混乱！下载后，经常需要修改mp3的名字。这里我发一个我以前用Python写的，专门用来修改那些网上下载的mp3歌曲后名称不正确时候，使用该函数，使用方法
ModifyMp3FileInfo(r'E:\音乐\12345.mp3')，就是字典与列表的用法！代码如下：

#!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'

但是上面这个代码只是针对，歌曲本身记录了mp3名字信息的才能够正确修改名字，但是某些时候文件中并没有记录这些信息，一般的这些数据信息都记录在MP3的的Id3V1数据段中，所以这里再给一个直接写入信息到这个数据段中。代码：

writeMp3Header = {
     "SongName":"",
     "SongPeople":"",
     "ZhuanJi":"",
     "Year":"",
     "Bak":""
     }

 def setMp3Header(mp3file):
     mp3Id3V1 = {        
         "SongName":-125,
         "SongPeople":-95,
         "ZhuanJi":-65,
         "Year":-35,
         "Bak":-31
         }
     tags = ['SongName','SongPeople','ZhuanJi','Bak']
     f = open(mp3file,'r+')
     try:
         f.seek(-128,2)
         try:
             tempstr = f.read(3)
             if tempstr == 'TAG':
                 for tag,startPos in mp3Id3V1.items():
                     if writeMp3Header[tag] != '':
                         f.seek(startPos,2)
                         if tag in tags:
                             if len(writeMp3Header[tag]) > 30: 
                                 f.write(writeMp3Header[tag][:30])
                             else:
                                 f.write(writeMp3Header[tag])
                         print startPos,tag,writeMp3Header[tag]
             else:
                 print 'is not a mp3file'
         except IOError:
             print 'read error'
     finally:
         f.close()

使用方式：

writeMp3Header[SongName] = '测试歌曲名称'
writeMp3Header[SongPeople] = '不得闲'
writeMp3Header[ZhuanJi] = '专辑'
writeMp3Header[Year] = '2009'
writeMp3Header[Bak] = '备注测试'
setMp3Header(r'E:\test.mp3')