code: def _default_template_args(self, content_template):
      
      def include(text, args):
        template_name = pystache.render(text, args)
        return self._renderer.render_name(template_name, args)
      # Our base template calls include on the content_template.
      ret = {'content_template': content_template}
      ret['include'] = lambda text: include(text, ret)
      return ret
docs: Initialize template args.