I am not following here, why do you need to inherit from `db_tables` if you are not doing using anything from that class?

From what I can tell, you are just reading the `summary.yaml` file, right?

Also, in the current implementation you are doing all that querying in `__init__` which would mean that every time you are instantiating this class, you are also querying the database, even if you do not need that