def test_invalidPositive(self):
        """
        L{isIPAddress} should return C{False} for a string containing
        positive decimal values greater than 255.
        """
        self.assertFalse(isIPAddress('256.0.0.0'))
        self.assertFalse(isIPAddress('0.256.0.0'))
        self.assertFalse(isIPAddress('0.0.256.0'))
        self.assertFalse(isIPAddress('0.0.0.256'))
        self.assertFalse(isIPAddress('256.256.256.256'))

        L{isIPAddress} should return C{False} for a string containing
        positive decimal values greater than 255.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_abstract.py