def test_invalidPunctuation(self):
        """
        L{isIPAddress} should return C{False} for a string containing
        strange punctuation.
        """
        self.assertFalse(isIPAddress(','))
        self.assertFalse(isIPAddress('1,2'))
        self.assertFalse(isIPAddress('1,2,3'))
        self.assertFalse(isIPAddress('1.,.3,4'))

        L{isIPAddress} should return C{False} for a string containing
        strange punctuation.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_abstract.py