On Wed, 3 Jan 2007, Dick Moores wrote: > Terry, I just noticed that farey(0.36, 10) returns (1, 3), a pretty > big miss, IMO. The correct fraction with smallest error and maximum > denominator of 10 is 3/8, which I'm proud to say my klunky frac.py > (<http://www.rcblue.com/Python/fracForWeb.py>) produces.
Dick, good catch. Consider adding a comment to the Cookbook page pointing out that the method sometimes does not produce the incorrect answer, including for that input. I note that the web page for the recipe says only that its produces "a rational," not necessarily the closest rational, but the description in the book says it's the closest: You have a number v (of almost any type) and need to find a rational number (in reduced form) that is as close to v as possible but with a denominator no larger than a prescribed value. (Recipe 18.13) _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
