Mailman 3 March 2006 - pypy-dev

First version of the CLI backend checked in
by Antonio Cuni March 22, 2006

March 22, 2006

Hi, I've just checked in the first version of the CLI backend; for now I've checked it in a branch located at http://codespeak.net/svn/user/antocuni/pypy-antocuni/ At the moment I've tested it only with mono under linux; for running the tests you need to have ilasm and mono in your path; the IL code is generated even if mono is not installed and can be found in /tmp/usession-*. Comments are welcome, ciao Anto

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Svn account?
by Antonio Cuni March 21, 2006

March 21, 2006

Hi, as I said I've begun writing the .NET CLI backend; it is still very experimental but it can already compile correctly some code snippets such as the algorithm for computing fibonacci's numbers. How can I check my work in svn? I think I should obtain an account, shouldn't I? Are there any guidelines for checking-in? Have I to follow only the coding rules exposed in doc/coding-guide.txt or is there some other rule I don't know about? ciao Anto

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Re: [Edu-sig] Properties use case
by Laura Creighton March 21, 2006

March 21, 2006

Douglas Blank just sent this to edu-sig. I want to use PyPy to control Robots. Just think of the demos we could make! :-) Laura In a message of Tue, 21 Mar 2006 12:58:55 EST, "Douglas S. Blank" writes: >On Tue, 2006-03-21 at 11:57 -0500, Arthur wrote: > >[snip] > >> I am of course thinking whether I have been knee-jerk in bringing Numer >ic >> into play as a fundamental tool for my application. >> >> Which I why I then move on to trying to get … [View More]serious about gaining some >> profiling skills. Gain some intelligence about the trade-offs of doing > the >> kind of simple linear algebra my application requires in pure Python, v >ersus >> what I may gaining by the creepy calls to laplack. >> >> Judgment calls need to be made in the end, but I take them seriously en >ough >> to want them to be informed judgment calls. > >I've been wrestling with these issues. I've built a Python robotics 2D >simulator in 99% Python, 1% Numeric. It works amazingly well: fast >enough and realistic enough to do the job. The robot can have sonar, IR, >and bumpers; lights, and light bulbs; a 2D camera with pan-zoom, and a >gripper to pick up things. The world has some simple physics (bump a >puck head-on and it will slide, with some friction). > >Then I extended it to be a 3D simulator. Still, amazingly, fast enough >and realistic enough to do the job. > >On the one hand, I like all of the source code to be accessible to the >student. We say that it is "Pythons all the way down". And that also >makes it portable. But on the other hand, it has to run fast enough. > >We are able to do it all in Python, expect for the nitty gritty vision >and image processing code, which we use SWIG and C++. > >I did some profiling, and was surprised at where some of the time was >spent. (This simulator is also controlled over sockets, so I had some >additional items to speed up). But, was able to refactor some, and get >some very substantial speedup, just in the Python portion. castRay() is >still the most expensive bit in Python. > >I am also looking at IronPython for .NET and Mono, and am wondering how >much I can get in one layer (without going to C/C++) and how fast it >will be... > >Here are some pictures: > >http://pyrorobotics.org/?page=The_20Pyrobot_20Simulator > >-Doug > >> No conclusions as yet. >> >> Art >-- >Douglas S. Blank Computer Science >Assistant Professor Bryn Mawr College >(610)526-6501 http://cs.brynmawr.edu/~dblank >_______________________________________________ >Edu-sig mailing list >Edu-sig(a)python.org >http://mail.python.org/mailman/listinfo/edu-sig [View Less]

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suggestion of next pypy-sync meeting topics
by hpk＠trillke.net March 21, 2006

March 21, 2006

Hi all, here are suggestions for the next pypy-sync topics. Please correct/comment if i missed information (i was busy and around in the US the last weeks). - status of Tokyo Sprint planning and content announcement? details? - planning the next releases and their content (at least start the discussion) - everyone: stating blockers and your perceiption of main problems/challenges with current development - publishing (some of) our Translation papers at a non-python … [View More]

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Re: [pypy-dev] CLI code generation
by Niklaus Haldimann March 20, 2006

March 20, 2006

Hi Antonio Antonio Cuni wrote: [..] > I have not yet studied the ootypesystem in details, so by now I can't > say if it is tailored for CLI object model: if it's not I think the best > thing is to extend the ootypesystem to introduce additional features, if > it's not a problem; this should simplify the writing of future backends > with object models similar to the CLI's one, such as Java. > > Since I decided to use the ootypesystem I started from gensqueak, but > now … [View More]

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Re: [pypy-svn] r24543 - pypy/dist/pypy/rpython/memory
by Christian Tismer March 20, 2006

March 20, 2006

cfbolz(a)codespeak.net wrote: > Author: cfbolz > Date: Sat Mar 18 23:36:38 2006 > New Revision: 24543 > > Modified: > pypy/dist/pypy/rpython/memory/gctransform.py > Log: > if possible use non-conservative liveness analysis: if the block contains no > non-gc ptrs that are not typeptrs (which are immortal anyway) we can stop > considering a variable to be live when it is no longer used in the rest of the > block. My head hurts at so many not's. Can you … [View More]

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pypy monthly?
by hpk＠trillke.net March 20, 2006

March 20, 2006

Hi Michael, hi all, we talked a bit about doing a "this month in pypy" instead of "this week". I think it makes sense and also to present some higher level summaries there if possible. On the one hand it's hard to keep up with a weekly rhythm and on the other hand the "larger" developments are harder to grasp. I think there is the one group who follows the commits rather closely and they have a good idea what goes on daily/weekly. Many others (including people who participated in … [View More]

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autopath/conftest/whatsoever bug?
by Christian Tismer March 20, 2006

March 20, 2006

Hi guys, nothing really bad, but it makes me think if we are consistent about certain things? I wanted to run py.test on folders which are not in the pypy path hierarchy. After a while, Richard came up with the idea to just copy conftest.py to the path where you are. And in fact, it works so far that if you do /pypy/dist/pypy/test_all.py --help you can see that the extra help options appear. But when I then run my test actually with the --view option, this option is simply ignored. No … [View More]

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hasattr issue
by Sanghyeon Seo March 19, 2006

March 19, 2006

Following code behaves differently from CPython: class NoAttribute(object): def __getattr__(self, name): raise Exception obj = NoAttribute() print hasattr(obj, 'attribute') Seo Sanghyeon

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refcounting woes
by Christian Tismer March 17, 2006

March 17, 2006

Well, I know there is a lot going on on GC and stuff, so this obcervation might not be new, but well, here it is. I figured that when we call the ll_decref operations, we actually create an except block for the decref. This expectblock then does a cleanup, by calling the same function again :-) Probably not really what we wanted to do. just in case this might help -- chris -- Christian Tismer :^) <mailto:tismer@stackless.com> tismerysoft GmbH : Have a … [View More]

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