def test_1(self): self.assertEqual(arithmeticSequence('123'), True)
def test_9(self): self.assertEqual(arithmeticSequence('13579'), True)
def test_6(self): self.assertEqual(arithmeticSequence('050'), False)
def test_5(self): self.assertEqual(arithmeticSequence('048'), True)
def test_4(self): self.assertEqual(arithmeticSequence('159'), True)
def test_3(self): self.assertEqual(arithmeticSequence('147'), True)