Black

lastmod 2025-06-19created 2020-12-138 edits

The uncompromising Python code formatter.

Exceptions

• The Black code style

How to exclude code from formatting within the code:

• Code between # fmt: off and # fmt: on. (at the same indentation level)
• Or code in YAPF style.

Skip a single line:

• # fmt: skip

See also

• Python
• Lint
• YAPF
• flake8
• Ruff - A Python linter that is 10-100x faster
• fixit - Meta releases Fixit 2, a next-generation auto-fixing linter for Python

Favorite site

• Github - black
• The uncompromising code formatter — Black 20.8b2.dev1 documentation
• Auto-formatting Python code style (pep8) with Black
• Unifying Python code style with Black