Source

flake8 / docs / setuptools.rst

Setuptools integration

Flake8 now depends on setuptools and its installation enables a command that checks the Python files declared by your project. To use it, add flake8 to your setup_requires:

setup(
    name="project",
    packages=["project"],

    setup_requires=[
        "flake8"
    ]
)

Running python setup.py flake8 on the command line will check the files listed in your py_modules and packages. If any warning is found, the command will exit with an error code:

$ python setup.py flake8