Mailman 3 December 2004 - pypy-dev

Re: [pypy-dev] Re: EU funding is official!
by Laura Creighton Dec. 5, 2004

Dec. 5, 2004

In a message of Sun, 05 Dec 2004 11:17:44 +0100, Florian Schulze writes: >On Thu, 2 Dec 2004 13:53:42 +0100, holger krekel <hpk(a)trillke.net> wrote: > >> Hi pypythonistas, >> >> lucky day! >> >> The EU signed the contract and the PyPy/EU projects starts, >> umm, started on 1st of December 2004! > >Congratulations! Thank you! > >> This means we have now two years of funding for PyPy >> to deliver research and implementation … [View More]

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question about read only attributes of my file object
by Laura Creighton Dec. 4, 2004

Dec. 4, 2004

I've a question about Python2.2 properties, setattr, getattr and friends. I've implemented a file object, which depending on how you open it picks a different implementation of a stream and uses that. Currently I have code that looks like this: def __setattr__(self, attr, value): "Make some attributes readonly." if attr in ['mode', 'name', 'closed', 'encoding']: if hasattr(self, attr): raise AttributeError, "'%s' is a read-only Attribute" % … [View More]attr # actually, write-once object.__setattr__(self, attr, value) (in file, which inherits from object). This works fine. When it comes to __getattr__ on the file object, what I want, if file does not provide its own attribute is getattr(self.fd, attr) of whatever stream I have ended up making fd. But Armin said that 2.2 provided properties (which I hadn't paid any attention to) which would do this in a neater way. Hmmm, I thought. But I cannot seem to get them to work. According to Guido's doc which I read here, http://www.python.org/2.2.3/descrintro.html#property it looks to me as if they don't do what I want. First I experimented with this: Python 2.3.4 (#2, Sep 24 2004, 08:39:09) [GCC 3.3.4 (Debian 1:3.3.4-12)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> class C(object): ... def __init__(self): ... self.mode = 'rU' ... def getval(self, val): ... return self.__dict__[val] ... mode = property(getval, None) ... >>> a = C() Traceback (most recent call last): File "<stdin>", line 1, in ? File "<stdin>", line 3, in __init__ AttributeError: can't set attribute --- Ok, this property takes effect even in __init__, rats. Try again: >>> class C(object): ... def __init__(self): ... self.mode = 'rU' ... def getval(self, val): ... return self.__dict__[val] ... def setval(self, attr, val): ... if hasattr(self, attr): ... raise AttributeError, "'%s' is a read-only Attribute" % attr ... # actually, write-once ... mode = property(getval, setval) ... >>> a = C() Traceback (most recent call last): File "<stdin>", line 1, in ? File "<stdin>", line 3, in __init__ TypeError: setval() takes exactly 3 arguments (2 given) --- Well, this looks as if I would have to write a separate setval for each attribute I want to pass once, and there is no way to give them all the same setval method. Am I missing something obvious? Probably. But properties look singularily useless to me right now. I suppose you could get around this limitation using metaclasses, but that looks like getting out a monkeywrench to crack a very small nut ... Laura [View Less]

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Re: [pypy-dev] question about read only attributes of my file object
by Laura Creighton Dec. 4, 2004

Dec. 4, 2004

In a message of Sat, 04 Dec 2004 16:48:23 GMT, Armin Rigo writes: >Hi Laura, Hi Armin: >On Sat, Dec 04, 2004 at 03:48:14PM +0100, Laura Creighton wrote: >> Ok, this property takes effect even in __init__, rats. > >Indeed. But __init__ can still write to the read-only attribute by bypas >sing >the property and writing to self.__dict__ directly. > >For reading: the name you use, getval(), is misleading. It should be called >getmode(), because it is specific … [View More]

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appspace considerations and genrpy
by Christian Tismer Dec. 4, 2004

Dec. 4, 2004

Hi Armin, all, finally I realized that I'm doing way too much in my translation efforts. It happened to me when I turned md5.py into RPython using my prototypic genrpy transformer, that this is in many cases not needed at all. If you look at md5.py, you'll see that it *is* already almost restricted Python. I can just move almost all functions over to the interpreter level. In a sense, md5 and sha do not really belong to the appspace modules. Instead, they are almost ready internal … [View More]

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new FP6 Call http://fp6.cordis.lu/fp6/call_details.cfm?CALL_ID=174#
by Laura Creighton Dec. 3, 2004

Dec. 3, 2004

check out IST-2004-2.3.4 (viii) Advanced Computing Architectures It looks to me as if these people want, among other things, PyPy. So if they are building a network of excellence, how do we get to be a member, or an associate member or some sort? If it takes them 1.5 years to go from sumbission to project, same as us, their project will be ready to go just as ours is wrapping up ... At any rate syngeries seem possible. Laura

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Congratulations to the Pypy team
by Xavier Heymans Dec. 2, 2004

Dec. 2, 2004

Last week Paul and I participated to the Calibre conference in Den Haag, Netherlands. Paul was invited to make the keynote speech. Some high-ranking EU commissioners were presents. They were very interested in open source and knew all the details about the Pypy project. Congratulations to the Pypy team for your project, your excellent lobby and for having open the EU minds to pen source. Xavier Xavier Heymans ----- xavier(a)zope-europe.org Tél : 00 32 - (0)10 45 99 02 Mobile : 00 32 - (0)… [View More]

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Re: [PyCON-Organizers] Jim Hugunin as keynote speaker
by Laura Creighton Dec. 1, 2004

Dec. 1, 2004

In a message of Tue, 30 Nov 2004 20:42:44 EST, Steve Holden writes: >Laura Creighton wrote: <snip> >> >> PyPy is funded as of Dec 1. They are signing the papers _now_ I believe >. >> Samuele Pedroni is coming to work for Strakt, to do PyPy. He can come >to Pycon. >> We're _all_ thinking about coming and having a Sprint. I forwarded t >his >> to pypy-dev -- I am sure that the rest of the gang will have things to >say. >> >… [View More]

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Re: [PyCON-Organizers] Jim Hugunin as keynote speaker
by Laura Creighton Dec. 1, 2004

Dec. 1, 2004

In a message of Tue, 30 Nov 2004 09:12:41 EST, "A.M. Kuchling" writes: >Jim Hugunin has agreed to do a keynote speech at PyCon 2005. In >private e-mail, Steve and I agreed that Feb. 1st was a reasonable >deadline for getting a title and abstract from Jim. It'll most likely >be about IronPython, but that's up to Jim. We should update the Wiki >and web pages to mention this. Jim will get free registration. > >Questions: > >Guido traditionally gives a keynote, so we … [View More]

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