def blacken()

in utils/generate-examples.py [0:0]

• 6 lines of code
• 1 McCabe index (conditional complexity)

def blacken(filename):
    runner = CliRunner()
    result = runner.invoke(
        black.main, [str(filename), "--line-length=75", "--target-version=py27"]
    )
    assert result.exit_code == 0, result.output