How to use the aldjemy.core.get_tables function in aldjemy

def _extract_model_attrs(model, sa_models):
    tables = get_tables()

    name = model._meta.db_table
    table = tables[name]
    fks = [t for t in model._meta.fields
             if isinstance(t, (ForeignKey, OneToOneField))]
    attrs = {}
    rel_fields = fks + list(model._meta.many_to_many)
    for fk in rel_fields:
        if not fk.column in table.c and not isinstance(fk, ManyToManyField):
            continue

        if django.VERSION < (1, 8):
            parent_model = fk.related.parent_model
        else:
            parent_model = get_remote_field(fk).model