Guilty as charged

[Schachner, Joseph]

Re: "...while

   thing == None
would work perfectly in almost all cases in practice, it's unidiomatic and suggests the writer isn't quite comfortable with the workings of the language"

I admit, I've been a C++ programmer for many years and a Python programmer for only about 5 years.  But, I did learn something here.  I've read books on Python and somehow still did not know that None is guaranteed to be a singleton in all implementations, and that not only does "thing is None" therefore work (guaranteed), but that that is the Pythonic thing to do.  ...   Maybe I missed it, but I'll remember it now.

--- Joseph S.