On Sun, 25 Jul 2010 10:04:57 am Steve Holden wrote:
- After seeing Raymond's talk about monocle (search for it on PyPI) I am getting excited again about PEP 380 (yield from, return values from generators). Having read the PEP on the plane back home I didn't see anything wrong with it, so it could just be accepted in its current form. Implementation will still have to wait for Python 3.3 because of the moratorium. (Although I wouldn't mind making an exception to get it into 3.2.)
I can understand the temptation, but hope you can manage to resist it.
The downside of allowing such exceptions is that people won't take these pronouncements seriously if they see that a sufficiently desirable goal is a reason for ignoring them. Everyone should be subject to the same rules.
I have no opinion on PEP 380 specifically, but surely a *sufficiently* desirable goal *should* be a reason for breaking the rules? Obedience to some abstract rule just because it is the rule is not a virtue. The moratorium is there to advance Python as a whole, and if (a big "if") it becomes a hindrance instead, then Guido should make an exception. I promise that I won't cease taking his pronouncements seriously if he does :) -- Steven D'Aprano