On Tue, Aug 14, 2018 at 10:45 AM, Rhodri James <rho...@kynesim.co.uk> wrote:
> On 'None is a constant': > > Erm. I think you've got carried away with simplifying this and gone down > a blind alley. None is a literal, and like any other literal can't be > rebound. no, it's not -- None is keyword, and just like any other keyword, it can't be re-bound. However, every other keyword I tried to rebind results in a generic: SyntaxError: invalid syntax (except None, True, and False) which I suppose is because while None is a keyword, it can be used pretty much anywhere any other name can be used (as opposed to say, def) Either this entire section is irrelevant or you meant to explain that there > is only one "NoneType" object. > > Constant is a bit of a loaded term in Python, and I think you've fallen > foul of it here. > yes, I think "singleton" is the word you want here, though it is a bi CS-y :-( -CHB -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov
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