On Jun 13, 5:22 pm, "Rhodri James" <rho...@wildebst.demon.co.uk> wrote: > Such an understanding would be clearly wrong in the context > in which we were talking (and denotational semantics is a > branch of category theory, which is not specific to computer > science if you don't mind). If None is nothing, then it can't > be a string, int, float or anything else, because they're all > something.
I appreciate your explanation, and your politeness. And I accept your answer, as well as Steven's and Paul's for that matter. I still think it is understandable (and people may choose to understand in a condescending way, if they wish) that someone might not get the difference between what you are saying and the statement that all elements of the empty set are floats. I mean, what's in the empty set? Nothing. But you've said that floats are something. How is it that nothing is something? Please, I do not wish to extend this thread. My last question was rhetorical. It's not a challenge. I accept your answer, as well as the others. To be clear, I find it very intuitive that None does not match the other types. But just as the devil seems to have plenty of advocates, I guess I am a naive person's advocate, of sorts. (I must stress I'm not the OP's advocate, nor do I consider him naive.) John -- http://mail.python.org/mailman/listinfo/python-list
