code: def setup(db_class, simple_object_cls, primary_keys):
      
      table_name = simple_object_cls.__name__
      column_names = simple_object_cls.FIELDS
  
      metadata = MetaData()
      table = Table(table_name, metadata,
                    *[Column(cname, _get_best_column_type(cname),
                             primary_key=cname in primary_keys)
                      for cname in column_names])
  
      db_class.metadata = metadata
      db_class.mapper_class = simple_object_cls
      db_class.table = table
  
      mapper(simple_object_cls, table)
docs: A simple API to configure the metadata