Structured Logging for Python
Project description
structlog is the production-ready logging solution for Python:
- Simple: At its core, everything is about functions that take and return dictionaries – all hidden behind familiar APIs.
- Powerful: Functions and dictionaries aren’t just simple, they’re also powerful. structlog leaves you in control.
- Fast: structlog is not hamstrung by designs of yore. Its flexibility comes not at the price of performance.
Thanks to its flexible design, you choose whether you want structlog to take care of the output of your log entries or whether you prefer to forward them to an existing logging system like the standard library's logging module.
The output format is just as flexible and structlog comes with support for JSON, logfmt, as well as pretty console output out-of-the-box:
Sponsors
structlog would not be possible without our amazing sponsors. Especially those generously supporting us at the The Organization tier and higher:
Please consider joining them to help make structlog’s maintenance more sustainable!
structlog has been successfully used in production at every scale since 2013, while embracing cutting-edge technologies like asyncio, context variables, or type hints as they emerged. Its paradigms proved influential enough to help design structured logging packages across ecosystems.
Project Information
- License: dual Apache License, version 2 and MIT
- Get Help: please use the structlog tag on Stack Overflow
- Supported Python Versions: 3.7 and later
- PyPI
- Source Code
- Documentation
- Changelog
- Third-party Extensions
structlog for Enterprise
Available as part of the Tidelift Subscription.
The maintainers of structlog and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source packages you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact packages you use. Learn more.
Release Information
Changed
- String interpolation in
FilteringBoundLogger(used by default) is now only attempted if positional arguments are passed. This prevents crashes if something different than a string is passed for the event argument. #475
Fixed
- String interpolation doesn't cause crashes in filtered log call anymore. #478
Credits
structlog is written and maintained by Hynek Schlawack. The idea of bound loggers is inspired by previous work by Jean-Paul Calderone and David Reid.
The development is kindly supported by my employer Variomedia AG, structlog’s Tidelift subscribers, and all my amazing GitHub Sponsors.
A full list of contributors can be found in GitHub’s overview.
The logs-loving futuristic beaver logo has been contributed by Russell Keith-Magee.
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