---
id: flake8
version: "7.3.0"
license: MIT
license_treatment: permissive
maintenance: active
---

# flake8 — the modular source code checker: pep8 pyflakes and co

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

## Install

pip install flake8
uv add flake8
poetry add flake8

## Description

.. image:: https://github.com/PyCQA/flake8/workflows/main/badge.svg
   :target: https://github.com/PyCQA/flake8/actions?query=workflow%3Amain
   :alt: build status

.. image:: https://results.pre-commit.ci/badge/github/PyCQA/flake8/main.svg
   :target: https://results.pre-commit.ci/latest/github/PyCQA/flake8/main
   :alt: pre-commit.ci status

.. image:: https://img.shields.io/discord/825463413634891776.svg
   :target: https://discord.gg/qYxpadCgkx
   :alt: Discord

========
 Flake8
========

Flake8 is a wrapper around these tools:

- PyFlakes
- pycodestyle
- Ned Batchelder's McCabe script

Flake8 runs all the tools by launching the single ``flake8`` command.
It displays the warnings in a per-file, merged output.

It also adds a few features:

- files that contain this line are skipped::

    # flake8: noqa

- lines that contain a ``# noqa`` comment at the end will not issue warnings.
- you can ignore specific errors on a line with ``# noqa: <error>``, e.g.,
  ``# noqa: E234``. Multiple codes can be given, separated by comma. The ``noqa`` token is case insensitive, the colon before the list of codes is required otherwise the part after ``noqa`` is ignored
- Git and Mercurial...

## AI interpretation — verify before relying

Flake8 is a Python code linter that combines PyFlakes, pycodestyle, and McCabe complexity checking into a single command-line tool, displaying style violations and potential errors in a unified output.

Verdict: Flake8 is a stable, widely-adopted linting tool with active maintenance, no known vulnerabilities, permissive licensing, and minimal dependencies. It integrates seamlessly into development workflows and CI/CD pipelines with low friction.

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