A fast, minimal structured JSON logger for Python.
git clone https://github.com/kimnt93/jlogger.git
cd jlogger
pip install -e .import datetime
import jlogger as jlog
jlog.setTimeFormat(jlog.TimeFormat.RFC3339)
logger = jlog.getLogger("trade")
if __name__ == "__main__":
# build scoped logger once
btc_logger = logger.with_value("symbol", "BTCUSDT")
eth_logger = logger.with_value("symbol", "ETHUSDT")
btc_logger.info().with_value("price", 65000).msg("tick")
eth_logger.info().with_value("price", 3200).msg("tick")Example output:
{"time":"2026-02-21T16:03:32.703149","logger":"trade","level":"info","message":"tick","symbol":"BTCUSDT","price":65000}
{"time":"2026-02-21T16:03:32.703149","logger":"trade","level":"info","message":"tick","symbol":"ETHUSDT","price":3200}See the examples/ directory for additional usage patterns.