def setUp(self):
        """
        Set up a few instance variables that will be useful.
        """
        self.builder = SphinxBuilder()

        # set up a place for a fake sphinx project
        self.twistedRootDir = FilePath(self.mktemp())
        self.sphinxDir = self.twistedRootDir.child("docs")
        self.sphinxDir.makedirs()
        self.sourceDir = self.sphinxDir

        Set up a few instance variables that will be useful.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_release.py