code: def get_attr(self, obj, name):
          
          attr_name = self.attr_names[name]
          return getattr(obj, attr_name)
docs: Get attribute of the target object with the configured attribute
          name in the :attr:`~brownant.pipeline.base.PipelineProperty.attr_names`
          of this instance.
  
          :param obj: the target object.
          :type obj: :class:`~brownant.dinergate.Dinergate`
          :param name: the internal name used in the
                  :attr:`~brownant.pipeline.base.PipelineProperty.attr_names`.
                  (.e.g. `"text_attr"`)