code: def get_first_song(self):
          
          count = 3
          while count > 0:
              song = self.requests_url('n')
              if song:
                  return song
              count -= 1
              time.sleep(2)
          raise GenericError('获取第一首歌曲失败，无法完成初始化')
docs: 初始获取歌曲
  
          :params return: json