code: def get_template_namespace(self) -> Dict[str, Any]:
          
          namespace = dict(
              handler=self,
              request=self.request,
              current_user=self.current_user,
              locale=self.locale,
              _=self.locale.translate,
              pgettext=self.locale.pgettext,
              static_url=self.static_url,
              xsrf_form_html=self.xsrf_form_html,
              reverse_url=self.reverse_url,
          )
          namespace.update(self.ui)
          return namespace
docs: Returns a dictionary to be used as the default template namespace.
  
          May be overridden by subclasses to add or modify values.
  
          The results of this method will be combined with additional
          defaults in the `tornado.template` module and keyword arguments
          to `render` or `render_string`.