def test_110_factory_in_degrees_fahrenheit(self):
     self.assertEqual(Temperature.from_fahrenheit(50).in_fahrenheit(), 50,
                          '50 f should equal 50 f')
     self.assertEqual(Temperature.from_fahrenheit(50).in_celsius(), 10,
                          '50 f should equal 10 c')
 def test_factory_fahrenheit(self): #"factory method"
     self.assertEqual(Temperature.from_fahrenheit(50).in_fahrenheit(), 50)
     self.assertEqual(Temperature.from_fahrenheit(50).in_celsius(), 10)