code: def description(cls):
          
  
          description = {}
          for column in cls.__table__.columns:  # pylint: disable=no-member
              column_description = str(column.type)
              if not column.nullable:
                  column_description += ' (required)'
              description[column.name] = column_description
          return description
docs: Return a field->data type dictionary describing this model
          as reported by the database.
  
          :rtype: dict