def get(self, mbid):
"""Return an album track list as JSON.
:param mbid: the album's MusicBrainz ID
"""
mb = MusicbrainzClient()
response = yield mb.lookup_release(mbid)
release = response['release']
track_list = release['medium-list'][0]['track-list']
tracks = []
for number, track in enumerate(track_list, start=1):
recording = track['recording']
tracks.append({
'id': recording['id'],
'number': number,
'title': recording['title'],
'album': release['title']
})
self.finish(json.dumps(tracks))
