code: def get_song_lyric(self, song_id):
          
  
          url = 'http://music.163.com/api/song/lyric?os=osx&id={}&lv=-1&kv=-1&tv=-1'.format(  # NOQA
              song_id)
          result = self.get_request(url)
          if 'lrc' in result and result['lrc']['lyric'] is not None:
              lyric_info = result['lrc']['lyric']
          else:
              lyric_info = 'Lyric not found.'
          return lyric_info
docs: Get a song's lyric.
  
          warning: use old api.
          :params song_id: song id.
          :return: a song's lyric.