code: def _on_error_page_write_error(self, status_code, **kwargs):
          
  
          if oz.settings.get('debug'):
              exception_type, exception_value, tback = sys.exc_info()
              is_breakpoint = isinstance(exception_value, oz.error_pages.DebugBreakException)
  
              frames = oz.error_pages.get_frames(tback, is_breakpoint)
              frames.reverse()
  
              if is_breakpoint:
                  exception_type = 'Debug breakpoint'
                  exception_value = ''
  
              self.render(oz.settings["error_pages_template"],
                  exception_type=exception_type,
                  exception_value=exception_value,
                  frames=frames,
                  request_input=self.request.body,
                  request_cookies=self.cookies,
                  request_headers=self.request.headers,
                  request_path=self.request.uri,
                  request_method=self.request.method,
                  response_output="".join(self._write_buffer),
                  response_headers=self._headers,
                  prettify_object=oz.error_pages.prettify_object,
              )
  
              return oz.break_trigger
docs: Replaces the default Tornado error page with a Django-styled one