On Tue, Aug 16, 2011 at 5:39 PM, Benjamin Peterson <benja...@python.org>wrote:
> 2011/8/16 Yury Selivanov <yselivanov...@gmail.com>: > > Is it possible for pypy core developers to create a high-level roadmap > with what needs to be done and where? Should python3 be another translation > target? Will it be required to touch rpython spec? What data structures > need to be introduced? etc. I don't think this planning will take weeks of > work, but it will help everyone to understand how much time and money should > be invested in the matter. > > First of all, there are some rather large decisions to be made: > > 1. Port everything (Python interpreter, RPython) over to Python 3 and > only support Python 3. This would probably be the cleanest and easiest > in the longterm solution, but I doubt many are willing to accept it > quite yet. > > 2. Somehow maintain Python 2 and 3 in the same codebase. It sounds > like a hideous mess to me. (I'm happy to be proven wrong.) > > 3. Maintain a Python 3 interpreter in a separate repo or branch. This > is probably the best compromise, but it requires the constant > maintenance of someone merging the current head work. > > Then someone has to buckle down and do the actual porting. Depending > on the option selected above, the amount of work will vary from huge > to colossal. If you pick option 2, you have to figure out how to test > both versions. I imagine there will be quite a tangled mess with > unicode. > > At any rate, some of the initial steps which are compatible with > Python 2 such as removing tuple unpacking and normalizing raise > statements can now be taken. They might even make the codebase a bit > cleaner. > > > > -- > Regards, > Benjamin > _______________________________________________ > pypy-dev mailing list > pypy-dev@python.org > http://mail.python.org/mailman/listinfo/pypy-dev > Personally I think #3 is the only sane path. We *need* a Python 2 VM for the forseeable future. We're pretty lucky in that the JIT, GC, and all the honest to god complex code is totally seperate from the VM, so just supporting 2 Python VMs is kind of easy (compared to maintaing 2 JITs or something). Alex -- "I disapprove of what you say, but I will defend to the death your right to say it." -- Evelyn Beatrice Hall (summarizing Voltaire) "The people's good is the highest law." -- Cicero
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