def save(self, filename=None):
        filename = Path(filename) if filename is not None else self.filename
        with filename.open("w") as f:
            f.write(self.yaml)
def _format_exception_message(cls, msg, pid):
        return cls._EXCEPTION_LOG_FORMAT.format(
            timestamp=cls._iso_timestamp_for_now(),
            process_title=setproctitle.getproctitle(),
            args=sys.argv,
            pid=pid,
            message=msg,
        )