Contributor installation

Basic installation

Pylint is developed using the git distributed version control system.

You can clone Pylint using

git clone

Before you start testing your code, you need to install your source-code package locally. Suppose you just cloned pylint with the previous git clone command. To set up your environment for testing, open a terminal and run:

cd pylint
python3 -m venv venv
source venv/bin/activate
pip install -r requirements_test_min.txt
pip install -e .

This ensures your testing environment is similar to Pylint's testing environment on GitHub.

Optionally (Because there's an auto-fix if you open a merge request): We have pre-commit hooks which should take care of the autoformatting for you before each commit. To enable it, run pre-commit install in the pylint root directory.

Even more optionally: You can enable slow on push hooks with pre-commit install --install-hooks -t pre-push. It will do slow checks like checking that the generated documentation is up to date before each push.

Astroid installation

If you're testing new changes in astroid you need to also clone astroid and install with an editable installation alongside pylint as follows:

# Suppose you're in the pylint directory
git clone
python3 -m pip install -e astroid/

You're now using the local astroid in pylint and can control the version with git for example:

cd astroid/
git switch my-astroid-dev-branch