code: def comments(self):  # pylint: disable=E0202
          
          if self._comments is None:
              self.comments = Submission.from_url(  # pylint: disable=W0212
                  self.reddit_session, self._api_link, comments_only=True)
          return self._comments
docs: Return forest of comments, with top-level comments as tree roots.
  
          May contain instances of MoreComment objects. To easily replace these
          objects with Comment objects, use the replace_more_comments method then
          fetch this attribute. Use comment replies to walk down the tree. To get
          an unnested, flat list of comments from this attribute use
          helpers.flatten_tree.