code: def emit(self, record):
          
          message = super(AppEngineHandler, self).format(record)
          gae_labels = self.get_gae_labels()
          trace_id = (
              "projects/%s/traces/%s" % (self.project_id, gae_labels[_TRACE_ID_LABEL])
              if _TRACE_ID_LABEL in gae_labels
              else None
          )
          self.transport.send(
              record, message, resource=self.resource, labels=gae_labels, trace=trace_id
          )
docs: Actually log the specified logging record.
  
          Overrides the default emit behavior of ``StreamHandler``.
  
          See https://docs.python.org/2/library/logging.html#handler-objects
  
          :type record: :class:`logging.LogRecord`
          :param record: The record to be logged.