code: def get_url_and_bitrate(self, song_title):
          
          song_id, bitrate = self.get_song_id(song_title)
          url = 'http://m1.music.126.net/'
          if song_id:
              url += self.encrypted_id(song_id) + '/' + str(song_id) + '.mp3'
              bitrate = str(bitrate/1000)
              return url, bitrate
          else:
              return None, None
docs: 根据歌名搜索320k地址