Structured Logging for Python

Release v20.2.0 (What's new?).

structlog makes logging in Python faster, less painful, and more powerful by adding structure to your log entries.

It’s up to you whether you want structlog to take care about 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.

First steps:

  • If you’re not sure whether structlog is for you, have a look at Why….

  • If you can’t wait to log your first entry, start at Getting Started and then work yourself through the basic docs.

  • Once you have basic grasp of how structlog works, acquaint yourself with the integrations structlog is shipping with.

User’s Guide

Integration with Existing Systems

structlog can be used immediately with any existing logger. However it comes with special wrappers for the Python standard library and Twisted that are optimized for their respective underlying loggers and contain less magic.

Advanced Topics

Getting Help

Please use the structlog tag on StackOverflow to get help.

Answering questions of your fellow developers is also a great way to help the project!

Project Information

structlog is dual-licensed under Apache License, version 2 and MIT, available from PyPI, the source code can be found on GitHub, the documentation at

We collect useful third party extension in our wiki.

structlog targets Python 3.6 and newer, and PyPy3.

If you need support for older Python versions, the last release with support for Python 2.7 and 3.5 was 20.1.0. The package meta data should ensure that you get the correct version.

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.

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