how to order keys?

[rophy]

I want "timestamp" to be dispayed as the first column, but not sure how to do that.

I tried this:

class LogFormatter(Logfmter):
    def format(self, record):
        record.ts = datetime.now().astimezone().isoformat()
        return super().format(record)

logger = logging.getLogger('neo4j-client')
handler = logging.StreamHandler()
formatter = LogFormatter(
    keys=["ts", "at"],
    mapping={"ts": "ts", "at": "levelname"}
)
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.setLevel(logging.INFO)

And hoped the keys arg could determine orders, but no luck:

at=INFO msg=Success total=9 success=6 errors=3 ts=2025-09-07T13:09:44.070825+00:00
at=INFO msg=Success total=10 success=7 errors=3 ts=2025-09-07T13:09:45.076040+00:00
at=INFO msg=Success total=11 success=8 errors=3 ts=2025-09-07T13:09:46.080163+00:00
at=INFO msg=Success total=12 success=9 errors=3 ts=2025-09-07T13:09:47.084549+00:00
at=INFO msg=Success total=13 success=10 errors=3 ts=2025-09-07T13:09:48.088060+00:00