def render(self, request):
        """
        Render me to a web client.

        Load my file, execute it in a special namespace (with 'request' and
        '__file__' global vars) and finish the request.  Output to the web-page
        will NOT be handled with print - standard output goes to the log - but
        with request.write.
        """
        request.setHeader(b"x-powered-by", networkString("Twisted/%s" % copyright.version))
        namespace = {'request': request,
                     '__file__': _coerceToFilesystemEncoding("", self.filename),
                     'registry': self.registry}
        try:
            execfile(self.filename, namespace, namespace)
        except IOError as e:
            if e.errno == 2: #file not found
                request.setResponseCode(http.NOT_FOUND)
                request.write(resource.NoResource("File not found.").render(request))
        except:
            io = NativeStringIO()
            traceback.print_exc(file=io)
            output = util._PRE(io.getvalue())
            if _PY3:
                output = output.encode("utf8")
            request.write(output)
        request.finish()
        return server.NOT_DONE_YET

        Render me to a web client.

        Load my file, execute it in a special namespace (with 'request' and
        '__file__' global vars) and finish the request.  Output to the web-page
        will NOT be handled with print - standard output goes to the log - but
        with request.write.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/script.py