Structured Logging for Python

Release v18.1.0 (What’s new?).

structlog makes logging in Python 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

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

structlog targets Python 2.7, 3.4 and newer, and PyPy.

If you need any help, visit us on #structlog on Freenode!

Indices and tables