test for None

[BartlebyScrivener]

>> Have you followed the tutorial through, running and understanding each
>> example, to get the basics of Python covered?

Could be high time to try that again. At first it was way too much, so
I've been doing Dive Into Python and some others. But I will try the
Tutorial again, at least up to classes. Then I'm sure I'll have to
return to the books.

Thanks for your patience.

rick