def get_user_specific_rating_for_exploration(user_id, exploration_id):
 exp_user_data_model = user_models.ExplorationUserDataModel.get(user_id, exploration_id)
 return (exp_user_data_model.rating if exp_user_data_model else None)

def get_user_specific_rating_for_exploration ( user_id , exploration_id ) : exp_user_data_model = user_models . ExplorationUserDataModel . get ( user_id , exploration_id ) return ( exp_user_data_model . rating if exp_user_data_model else None )
fetches a rating for the specified exploration from the specified user if one exists .