def testOK(self):
good_values = [1, 2.909, 0, 123,456,789.0, '12345']
for num in good_values:
self.assertTrue(courier.is_numeric(num))
def testNotOK(self):
bad_values = ['c', '2.9o9']
for num in bad_values:
self.assertFalse(courier.is_numeric(num))