code: def _get_summary_struct(self):
          
          section = []
          section_titles = ['Attributes']
          for f in self._list_fields():
              section.append( ("%s" % f,"%s"% f) )
  
          return ([section], section_titles)
docs: Returns a structured description of the model, including (where
          relevant) the schema of the training data, description of the training
          data, training statistics, and model hyperparameters.
  
          Returns
          -------
          sections : list (of list of tuples)
              A list of summary sections.
                Each section is a list.
                  Each item in a section list is a tuple of the form:
                    ('<label>','<field>')
  
          section_titles: list
              A list of section titles.
                The order matches that of the 'sections' object.