Version control integration

Use pre-commit. Once you have it installed, add this to the .pre-commit-config.yaml in your repository:

repos:
  # Using this mirror lets us use mypyc-compiled black, which is about 2x faster
  - repo: https://github.com/psf/black-pre-commit-mirror
    rev: 25.1.0
    hooks:
      - id: black
        # It is recommended to specify the latest version of Python
        # supported by your project here, or alternatively use
        # pre-commit's default_language_version, see
        # https://pre-commit.com/#top_level-default_language_version
        language_version: python3.11

Feel free to switch out the rev value to a different version of Black.

Note if you’d like to use a specific commit in rev, you’ll need to swap the repo specified from the mirror to https://github.com/psf/black. We discourage the use of branches or other mutable refs since the hook won’t auto update as you may expect.

Jupyter Notebooks

There is an alternate hook black-jupyter that expands the targets of black to include Jupyter Notebooks. To use this hook, simply replace the hook’s id: black with id: black-jupyter in the .pre-commit-config.yaml:

repos:
  # Using this mirror lets us use mypyc-compiled black, which is about 2x faster
  - repo: https://github.com/psf/black-pre-commit-mirror
    rev: 25.1.0
    hooks:
      - id: black-jupyter
        # It is recommended to specify the latest version of Python
        # supported by your project here, or alternatively use
        # pre-commit's default_language_version, see
        # https://pre-commit.com/#top_level-default_language_version
        language_version: python3.11

Note

The black-jupyter hook became available in version 21.8b0.