---
id: structlog
version: "26.1.0"
license: MIT OR Apache-2.0
license_treatment: permissive
maintenance: active
---

# structlog — Structured Logging for Python

License: permissive · Maintenance: active · Popularity: top 1,000 on PyPI

## Install

pip install structlog
uv add structlog
poetry add structlog

## Description

<p align="center">
    <img
        src="https://www.structlog.org/en/stable/_static/structlog_logo_small.png"
        alt="structlog mascot"
    />
</p>

*structlog* is *the* production-ready logging solution for Python:

- **Simple**: Everything is about **functions** that take and return **dictionaries** – all hidden behind **familiar APIs**.
- **Powerful**: Functions and dictionaries aren’t just simple but 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*](https://brandur.org/logfmt), as well as pretty console output out-of-the-box:

[![Screenshot of colorful structlog output with...

## AI interpretation — verify before relying

structlog is a structured logging library that outputs logs as dictionaries through flexible APIs, supporting JSON, logfmt, and pretty console formats while optionally integrating with Python's standard logging module.

Verdict: structlog is a mature, actively maintained production logging solution with minimal dependencies, permissive licensing, and no known vulnerabilities. Its flexible architecture and support for multiple output formats make it suitable for both simple and complex logging needs.

[View on SkillFed](https://skillfed.io/packages/structlog) · [View on PyPI](https://pypi.org/project/structlog/)