On Sun, 30 Apr 2017 15:58:13 +0100 Alan Gauld via Tutor <tutor@python.org> wrote:
> I would probably combine both such that for each cell you > have a tuple containing the given number and the set of > candidates. In some cases the number may be a sentinel > (such as -1) to indicate no number yet, and for some > cells the set will be empty. > > But by always having both available your data handling > becomes consistent, you always know that you get a tuple > and you know can easily test the sentinel to see3 if > the value is set or not. And you never need to > test types. Thank you again Alan, During the intervening period between when my question appeared on the mailing list, plus our time zone difference, I had come to almost the same conclusion. All numbers are now sets, the likely candidates and the given numbers. No more fooling around with different types, they're all sets. I now have a working solution. Many of the methods have very similar code to each other and I'm currently working on making the code simpler and less confusing. After that I'll give programming a rest for awhile. -- Regards, Phil _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
