models.py

from google.appengine.ext import db
import json

class AudioSummary(db.Model):
  # keyname would a lower-case artist name.
  audio_summary = db.TextProperty()
  
  
def prepolulate(artist, content):
  if not isinstance(content, basestring):
    content = json.dumps(content)
  summary = AudioSummary(key_name=artist, audio_summary=content)
  summary.put()
  return summary

def get_audio_summary(artist):
  return json.loads(AudioSummary.get_by_key_name(artist).audio_summary)