logquill
A structured, leveled logging framework for Python with pluggable transports
and a plugin pipeline. Sibling to logquill on npm
(logquill-js) — same log record shape, same level names, one mental model
across a Python + Node stack.
Status: pre-release, under active development. The core Logger and level
filtering are implemented; transports, plugins, and async dispatch are not
yet — see CHANGELOG.md for what's landed so far.
Install
pip install logquill
Quickstart
from logquill import Level, Logger
logger = Logger("app", level=Level.INFO)
record = logger.info("user signed up", user_id=42, plan="pro")
print(record)
# {'timestamp': '2026-08-27T18:04:12.345Z', 'level': 'INFO', 'logger': 'app',
# 'message': 'user signed up', 'meta': {'user_id': 42, 'plan': 'pro'}}
logger.debug("below threshold, dropped") # -> None, filtered by level
logger.set_level("debug")
logger.debug("now visible") # -> a record dict
Every log call returns the record dict (or None if filtered by level) —
{"timestamp": ISO8601, "level": str, "logger": str, "message": str, "meta": dict},
the same shape shared with logquill on npm.
Use JSONFormatter to serialize a record to the canonical JSON line:
from logquill import JSONFormatter
print(JSONFormatter().format(record))
# '{"timestamp":"2026-08-27T18:04:12.345Z","level":"INFO","logger":"app","message":"user signed up","meta":{"user_id":42,"plan":"pro"}}'
Development
python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev,http,hooks]"
pre-commit install
ruff check .
mypy logquill
pytest
See CONTRIBUTING.md for the PR workflow, and the Code of Conduct for community standards.
1 maintainer
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