Mailman 3 November 2007 - pypy-dev

Re: [pypy-dev] gbg sprint
by Laura Creighton 09 Nov '07

09 Nov '07

In a message of Tue, 06 Nov 2007 14:29:01 +0100, Armin Rigo writes: >Hi Laura, > >On Tue, Nov 06, 2007 at 01:00:28PM +0100, Laura Creighton wrote: >> jacob and I already have tickets for the piano concert which >> should be fantastic on the 20th and then have tickets for the 22nd >> for the Ravel concert. Anybody want me to get some more tickets for >> them? > >While this sounds fantastic, I'm afraid I'll be far too tired for >anything at all, on these evenings so close to our return from this >crazy trip of ours. > > >Armin I may be in the same state. Hope not. But I suspect I can find a home for my season's ticket if that is the case. Laura

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Traceback surgery
by Maciek Fijalkowski 08 Nov '07

08 Nov '07

I've got an issue about distribution lib. I would like to do a bit more surgery of presented traceback, which needs cutting and sticking it back together. On top of cpython it's impossible, because this stuff is read only (you cannot modify tb.tb_next for example). Do we have a good reason why readonlyness remain in pypy? Of course I can cheat and use transparent proxy for that, but as long as this code would never work on top of cpython, can we lift those restrictions? Cheers, fijal :.

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gbg sprint
by Laura Creighton 07 Nov '07

07 Nov '07

If you go to http://www.gso.se/ change the language to english, if you prefer, and then look at the calendar you can see what is playing at the concerthouse. jacob and I already have tickets for the piano concert which should be fantastic on the 20th and then have tickets for the 22nd for the Ravel concert. Anybody want me to get some more tickets for them? Laura

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RPython unicode support design question
by Carl Friedrich Bolz 06 Nov '07

06 Nov '07

Hi all, Maciek is working on adding unicode support for RPython and him and me were discussing some of the design issues. One of the questions we had is how mixing of strings and unicode should work in RPython. My proposal is the following: forbid _all_ mixing of strings and unicode in RPython. Mixing of strings and unicode would result in a SomeObject (e.g. "hello" + u"world" wouldn't be allowed). The only way to turn a byte string into a unicode object would be to use the encode and decode methods and I guess in the beginning the only allowed encoding would be "ascii" (we can think about supporting other encodings later, or leave it to something in pypy/rlib). This has many advantages, it forces the programmer to cleanly separate between unicode and byte strings and it makes some part of the implementation less messy. Does that make sense to everybody? Are there other proposals? Cheers, Carl Friedrich

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Re: [pypy-dev] [pypy-svn] r48286 - pypy/dist/pypy/rpython
by Samuele Pedroni 05 Nov '07

05 Nov '07

are you sure this tweak is still correct, I cannot remember the intention of this code but I'm sure it was not as it was for random reasons... fijal(a)codespeak.net wrote: > Author: fijal > Date: Sun Nov 4 15:16:32 2007 > New Revision: 48286 > > Modified: > pypy/dist/pypy/rpython/rpbc.py > Log: > This effectively mutes some rpbc rtyper warnings > > > Modified: pypy/dist/pypy/rpython/rpbc.py > ============================================================================== > --- pypy/dist/pypy/rpython/rpbc.py (original) > +++ pypy/dist/pypy/rpython/rpbc.py Sun Nov 4 15:16:32 2007 > @@ -481,8 +481,8 @@ > if r_value.lowleveltype is Void: > continue > try: > - thisattrvalue = frozendesc.attrcache[attr] > - except KeyError: > + thisattrvalue = frozendesc.read_attribute(attr) > + except AttributeError: > warning("Desc %r has no attribute %r" % (frozendesc, attr)) > continue > llvalue = r_value.convert_const(thisattrvalue) > _______________________________________________ > pypy-svn mailing list > pypy-svn(a)codespeak.net > http://codespeak.net/mailman/listinfo/pypy-svn >

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Hi all. I am Looking for a project idea.
by amit 04 Nov '07

04 Nov '07

Hi, I went across this page http://codespeak.net/pypy/dist/pypy/doc/project-ideas.html My project requires me to modify an existing compiler or interpreter, or write a program from scratch. I could not figure out how much time it would take to say write an interpreter for Aldor. If someone has some suggestion on any idea that I could put an effort into for 4 weeks (that's when my project work is due) I would be very happy to learn more of pypy. I have fair amount of python coding experience. Regards, Regmee Univ. of Western Ontario, CA

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windows path issue solved
by Christian Tismer 03 Nov '07

03 Nov '07

Hi, it took a while to find a way to get os initialization right on windows, especially because the problem pops up only when pypy is compiled. sys.executable is not in all cases set correctly, yet, but it suffices to find pypy's libraries reliably. see revision 48247 cheers - chris -- Christian Tismer :^) <mailto:tismer@stackless.com> tismerysoft GmbH : Have a break! Take a ride on Python's Johannes-Niemeyer-Weg 9A : *Starship* http://starship.python.net/ 14109 Berlin : PGP key -> http://wwwkeys.pgp.net/ work +49 30 802 86 56 mobile +49 173 24 18 776 fax +49 30 80 90 57 05 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/

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Re: [pypy-dev] Hi all. I am Looking for a project idea.
by Laura Creighton 01 Nov '07

01 Nov '07

In a message of Thu, 01 Nov 2007 10:47:05 +0100, Carl Friedrich Bolz writes: >Hi Laura! > >Laura Creighton wrote: >[snip] >> Whether modifying pypy makes sense depends a lot on what sort of >> language you would like to generate. PyPy was designed for dynamic >> langauges -- so a functional one, while not impossible, may not be the >> best fit. > >Just about this particular point: I am not sure that functional >languages per se are a bad fit for PyPy. On the one hand there are >functional languages such as Erlang that are dynamically typed >("dynamic" and "functional" are really orthogonal properties). On the >other hand the implementation of some functional languages uses the >staticness of the type system mostly "on the outside" to report to the >user and not "on the inside" to actually implement the language. I guess >this is especially true for an interpreter of a functional language. I >might be totally misinformed there, though. > >[snip] > >Cheers, > >Carl Friedrich I think that all that what I wrote indicates is my belief that writing a Haskell front end for PyPy would be hard. Thanks for taking my foot out of my mouth. Laura

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Re: [pypy-dev] Hi all. I am Looking for a project idea.
by Laura Creighton 01 Nov '07

01 Nov '07

In a message of Thu, 01 Nov 2007 00:03:19 -0400, amit writes: >Hi, > >I went across this page >http://codespeak.net/pypy/dist/pypy/doc/project-ideas.html > >My project requires me to modify an existing compiler or interpreter, or >write a program from scratch. I could not figure out how much time it >would take to say write an interpreter for Aldor. If someone has some >suggestion on any idea that I could put an effort into for 4 weeks >(that's when my project work is due) I would be very happy to learn more >of pypy. > >I have fair amount of python coding experience. > > >Regards, >Regmee >Univ. of Western Ontario, CA The pypy team hangs out on irc.freenode.net in the channel #pypy. Most of us live in Europe, so we'll already be there when you get this mail. All I know about Aldor is that it is a functional language that some people use to do math. I went here: http://www.aldor.org/wiki/index.php/Main_Page and didn't learn much because most of the links are stale. Whether modifying pypy makes sense depends a lot on what sort of language you would like to generate. PyPy was designed for dynamic langauges -- so a functional one, while not impossible, may not be the best fit. Do you have to produce an Aldor compiler? The other thing that matters is exactly what your teacher wants you to learn. PyPy's architecture is unique in the world, and we will be happy to talk your ear off about why this is a) necessary and b) a great idea. But it may not be what your teacher is expecting, which can be either fantastic or extremely unfortunate, depending on the teacher. come by and talk to us, Laura Creighton ps - 4 of us are right now putting the polish on a presentation we are giving to IBM Research in NY on Monday. So we have less time to chat than usual. But the rest of the usual suspects will be around :-)

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