docs: def execute_single(self, request):
          """
          Builds, sends and handles the response to a single request, returning
          the response.
          """
          if self.logger:
              self.logger.debug('Executing single request: %s', request)
  
          self.removeRequest(request)
  
          body = remoting.encode(self.getAMFRequest([request]), strict=self.strict)
  
          http_request = urllib2.Request(self._root_url, body.getvalue(),
              self._get_execute_headers())
  
          if self.proxy_args:
              http_request.set_proxy(*self.proxy_args)
  
          envelope = self._getResponse(http_request)
  
          return envelope[request.id]