larzlog
Structured logging — readable, level-filtered logs (text or JSON) for real apps.
When your app runs somewhere you can't see, logs are your eyes. larzlog is a small
structured logger: levels you can filter, key=value context fields, output as
human-readable text or machine-readable JSON, and bind to attach context (like a
request id) to every line. Everything is injectable (output, clock) so it's easy to
test. Zero dependencies.
Install
pip install larzlog
Use
from larzlog import Logger
log = Logger("api", level="INFO")
log.info("user signed up", user_id=42, plan="pro")
# INFO api: user signed up user_id=42 plan=pro
req = log.bind(request_id="abc123")
req.warning("slow response", ms=812)
Learn to code with Larz
Part of the learn-to-code toolkit in the Larz stack — see the Learn to Code platform. A building block for running apps in production.
Tests
python -m unittest discover -s tests -v # 5 tests
License
MIT (c) larz-scripter
1 maintainer
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