def test_false(self):
     self.assertFalse(is_valid_IP(''))
 def test_true(self):
     self.assertTrue(is_valid_IP('12.255.56.1'))
 def test_false_7(self):
     self.assertFalse(is_valid_IP('123.045.067.089'))
 def test_false_6(self):
     self.assertFalse(is_valid_IP('12.34.56.-1'))
 def test_false_3(self):
     self.assertFalse(is_valid_IP('123.456.789.0'))
 def test_false_2(self):
     self.assertFalse(is_valid_IP('abc.def.ghi.jkl'))