def post(self):
query = Game.gql("WHERE inProgress = False")
games = query.fetch(20)
self.response.headers['Content-Type'] = 'application/json'
output = []
for game in games :
output.append({'key' : game.key().name(), 'players' : 4 - len(game.pieces)})
self.response.write(json.dumps(output))