[Python-3000] Fwd: Re: pep 3124 plans (original) (raw)
Phillip J. Eby pje at telecommunity.com
Fri Jul 20 04:37:53 CEST 2007
- Previous message: [Python-3000] Introspection broken for objects using Py_FindMethod()
- Next message: [Python-3000] uuid creation not thread-safe?
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
FYI... another TurboGears developer speaks up re: their generic function use.
Date: Thu, 19 Jul 2007 20:17:23 -0400 From: "Mark Ramm" To: "Phillip J. Eby" Subject: Re: [Python-3000] pep 3124 plans
FYI, Jonathan, the version of PEAK-Rules that's in SVN implements everything that's currently in PEP 3124 except the Interface bits.
It does not, however, implement RuleDispatch-style predicate expressions, just argument-isinstance tests. I'd hoped to have predicates done this month, but it's running a couple weeks behind. After it's done, I plan to throw together a RuleDispatch-style API over it, to make porting/testing easier, using something like "from peak.rules import dispatch" to get a module that fakes the RuleDispatch API (e.g. somefunc.when() instead of when(somefunc)). This is good news indeed. TurboGears 2 is looking for rule based dispatch, and I'm very interested in PEAK Rules as an alternative to RD since you've pretty much deprecated RD. But an RD like interface on PEAK-Rules will make TG2 more API compatible, and opens up the possibility of moving over in the tg 1.x line. Predicate dispatch isn't really needed for some of the things in TurboGears, and there are a couple of places where we went overboard with generic functions everywhere. But, at the same time there are other places where generic functions and predicate dispatch really make things a lot easier to understand, and it would hurt quite a bit to have to to give it up. As the maintainer of tg2, my main interest is to have a viable, reasonably well supported, generic function implementation that we can use and rely on. I don't so much care that it's baked into the core language, or included in the standard library -- though I think those would be great things. Generic functions helped me to think about problems in a new way, and have been a remarkably useful tool to have in my toolbox. --Mark Ramm
- Previous message: [Python-3000] Introspection broken for objects using Py_FindMethod()
- Next message: [Python-3000] uuid creation not thread-safe?
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]