Simple models for a game and a pick

game_models.py

class Game(db.Model):
    team = db.ReferenceProperty(Team)
    home_team = db.ReferenceProperty(Team)
    start_time = db.DateTimeProperty

class Pick(db.Model):
    # Models a user's prediction of which team will win a game.
    user = db.ReferenceProperty(User)
    game = db.ReferenceProperty(Game)
    picked_team = db.ReferenceProperty(Team)