def test_modeUNIX(self):
        """
        C{mode} can be set by including C{"mode=<some integer>"}.
        """
        self.assertEqual(
            self.parse('unix:/var/run/finger:mode=0660', self.f),
            ('UNIX', ('/var/run/finger', self.f),
             {'mode': 0o660, 'backlog': 50, 'wantPID': True}))

        C{mode} can be set by including C{"mode=<some integer>"}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/test/test_endpoints.py