根据歌名搜索320k地址

def get_url_and_bitrate(self, song_title):
        """
        根据歌名搜索320k地址
        """
        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