Example black config with excludes for the migrations directory

black-pyproject.toml

[tool.black]
line-length = 120
target-version = ['py38']
exclude = '''
(
  /(
      \.eggs         # exclude a few common directories in the
    | \.git          # root of the project
    | \.mypy_cache
    | \.tox
    | \.venv
    | __pycache__
    | _build
    | build
    | dist
    | docs
    | venv
    | migrations\/*
  )/
)
'''