def _updateLogDateTime(self):
        """
        Update log datetime periodically, so we aren't always recalculating it.
        """
        self._logDateTime = datetimeToLogString(self._reactor.seconds())
        self._logDateTimeCall = self._reactor.callLater(1, self._updateLogDateTime)

        Update log datetime periodically, so we aren't always recalculating it.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/http.py