>> I think I would rewrite the current unit-testing
>> example to use the
>> standard library unittest module::

>>      # Let's write reusable code, and unit test it.
>>      def add_money(amounts):
>>          # do arithmetic in pennies so as not to
>> accumulate float errors
>>          pennies = sum([round(int(amount * 100)) for
>> amount in amounts])
>>          return float(pennies / 100.0)
>>      import unittest
>>      class TestAddMoney(unittest.TestCase):
>>          def test_float_errors(self):
>>              self.failUnlessEqual(add_money([0.13,
>> 0.02]), 0.15)
>>              self.failUnlessEqual(add_money([100.01,
>> 99.99]), 200)
>>              self.failUnlessEqual(add_money([0,
>> -13.00, 13.00]), 0)
>>      if __name__ == '__main__':
>>          unittest.main()

>> I believe I've still kept it to 13 lines.

> I approve this change, although in a sense, it's
> harder for a Python newbie, because it introduces
> inheritance a little earlier than I would have liked.

> FWIW I'm in the minority (I think) of people that
> prefer roll-your-own testing, but I don't want to
> argue that, because I think it mostly comes down to
> personal preference.