Re: Comparison operators in Python

2011-06-02 Thread Michael Sparks
On Jun 2, 1:44 am, harrismh777 harrismh...@charter.net wrote: ..     Just another example (excluding  print  1/2  and  unicode) where 3.x seems to be completely compatible with 2.x/   (tongue-in-cheek) One of the key purposes of the 3.x line of code is to get rid of warts in the language. As a

Re: Extending classes __init__behavior for newbies

2011-02-14 Thread Michael Sparks
It can be broken if someone tries to use the class as is - that is treating the class as a model - to drive a display of the ship. If it was written using super() then that wouldn't be a problem. For example, I could write a display mixin that I'd like to use like this: class VisibleShip(ship,

Re: Extending classes __init__behavior for newbies

2011-02-14 Thread Michael Sparks
On Feb 14, 7:15 pm, rantingrick rantingr...@gmail.com wrote: On Feb 14, 11:55 am, Michael Sparks spark...@gmail.com wrote: It can be broken if someone tries to use the class as is - that is treating the class as a model - to drive a display of the ship. If it was written using super

Re: Namespaces

2011-01-21 Thread Michael Sparks
On Jan 21, 10:39 am, sl33k_ ahsanbag...@gmail.com wrote: What is namespace? And what is built-in namespace? tl;dr - Namespaces are sets that contain names. You can think of namespaces as being /like/ boxes. A namespace is therefore an organisational tool, forming a similar purpose to human names

ANN: Kamaelia 1.0.12.0 Released

2010-12-29 Thread Michael Sparks
, generates word clouds etc. * Front end uses Django and web graph APIs to presnet data. Mailing list: http://groups.google.com/group/kamaelia Have fun :-) Michael Sparks -- http://twitter.com/kamaelian http://yeoldeclue.com/blog -- http://mail.python.org/mailman/listinfo

Re: Nested Scopes unintended behaviour ?

2010-03-18 Thread Michael Sparks
On Mar 17, 8:29 pm, Terry Reedy tjre...@udel.edu wrote: On 3/17/2010 11:44 AM, Emile van Sebille wrote: On 3/17/2010 8:16 AM Michael Sparks said... Hi, Is the following behaviour expected ? In short, yes. Assignment within a function forces the variable to locals. In 3.x, one can

Nested Scopes unintended behaviour ?

2010-03-17 Thread Michael Sparks
Hi, Is the following behaviour expected ? Python 2.6.4 (r264:75706, Dec 7 2009, 18:45:15) [GCC 4.4.1] on linux2 Type help, copyright, credits or license for more information. def Toggler(F, B): ... print F(Hello) ... print F(Hello) ... print F(Hello) ... print F(Hello) ...

Re: Interesting talk on Python vs. Ruby and how he would like Python to have just a bit more syntactic flexibility.

2010-02-20 Thread Michael Sparks
On Feb 18, 4:15 pm, Steve Howell showel...@yahoo.com wrote: ...     def print_numbers()         [1, 2, 3, 4, 5, 6].map { |n|             [n * n, n * n * n]         }.reject { |square, cube|             square == 25 || cube == 64         }.map { |square, cube|             cube        

Re: Modifying Class Object

2010-02-13 Thread Michael Sparks
Hi Alf, On Feb 12, 8:22 pm, Alf P. Steinbach al...@start.no wrote: Thanks for the effort at non-flaming discussion, it *is* appreciated. I would appreciate it if you tried to be non-flaming yourself, since you can see I am not flaming you. I was seeking to educate you on a simple matter

Re: Modifying Class Object

2010-02-12 Thread Michael Sparks
Hi Alf, Before I start, note we're talking about semantics, not implementation. That distinction is very important. On Feb 11, 4:49 am, Alf P. Steinbach al...@start.no wrote: *The* standard general language independent definition? [ of pointer ] Yes. As defined where? For example, as

Re: 2.6, 3.0, and truly independent intepreters

2008-10-28 Thread Michael Sparks
Glenn Linderman wrote: so a 3rd party library might be called to decompress the stream into a set of independently allocated chunks, each containing one frame (each possibly consisting of several allocations of memory for associated metadata) that is independent of other frames We use a

Re: Python suitable for Midi ?

2008-10-28 Thread Michael Sparks
Protocol wrote: Is Python suitable for building a multi-track midi sequencer (with a gui), that would run on windows / mac ? I fail to find sufficient information on this, being a newbie and all. We had a Google Summer of Code student working on this sort of thing this year (This clearly

Re: 2.6, 3.0, and truly independent intepreters

2008-10-28 Thread Michael Sparks
Philip Semanchuk wrote: On Oct 25, 2008, at 7:53 AM, Michael Sparks wrote: Glenn Linderman wrote: In the module multiprocessing environment could you not use shared memory, then, for the large shared data items? If the poshmodule had a bit of TLC, it would be extremely useful

Re: Do I need a lock here?

2008-10-27 Thread Michael Sparks
jasiu85 wrote: Do I need a lock to protect the COMMON_DICT dictionary? AFAIK bytecode operations are atomic and in each thread there's only one crucial bytecode op: STORE_NAME in the first thread and LOAD_NAME in the second one. So I suspect that everything will work just fine. Am I right?

Re: 2.6, 3.0, and truly independent intepreters

2008-10-25 Thread Michael Sparks
Hi Andy, Andy wrote: However, we require true thread/interpreter independence so python 2 has been frustrating at time, to say the least.  Please don't start with but really, python supports multiple interpreters because I've been there many many times with people. And, yes, I'm aware of

Re: 2.6, 3.0, and truly independent intepreters

2008-10-25 Thread Michael Sparks
Andy O'Meara wrote: Yeah, that's the idea--let the highest levels run and coordinate the show. Yes, this works really well in python and it's lots of fun. We've found so far you need at minimum the following parts to a co-ordination little language: Pipeline Graphline Carousel

Re: 2.6, 3.0, and truly independent intepreters

2008-10-25 Thread Michael Sparks
Glenn Linderman wrote: In the module multiprocessing environment could you not use shared memory, then, for the large shared data items? If the poshmodule had a bit of TLC, it would be extremely useful for this, since it does (surprisingly) still work with python 2.5, but does need a bit of

Re: 2.6, 3.0, and truly independent intepreters

2008-10-25 Thread Michael Sparks
Andy O'Meara wrote: basically, it seems that we're talking about the embarrassingly parallel scenario raised in that paper We build applications in Kamaelia and then discover afterwards that they're embarrassingly parallel and just work. (we have an introspector that can look inside running

Re: 2.6, 3.0, and truly independent intepreters

2008-10-25 Thread Michael Sparks
Jesse Noller wrote: http://www.kamaelia.org/Home Thanks for the mention :) I don't think it's a good fit for the original poster's question, but a solution to the original poster's question would be generally useful IMO, _especially_ on python implementations without a GIL (where threads are

ANN: Kamaelia 0.6.0, Axon 1.6.0 - New Release

2008-10-22 Thread Michael Sparks
is released under the Mozilla tri-license scheme (MPL1.1/GPL2.0/LGPL2.1). See http://www.kamaelia.org/Licensing Finally, many thanks to everyone who's contributed to this release. Best Regards, Michael. -- Michael Sparks, Senior Research Engineer, BBC Research [EMAIL PROTECTED], Kamaelia Project Lead

ANN: Kamaelia 0.6.0, Axon 1.6.0 - New Release

2008-10-22 Thread Michael Sparks
under the Mozilla tri-license scheme (MPL1.1/GPL2.0/LGPL2.1). See http://www.kamaelia.org/Licensing Finally, many thanks to everyone who's contributed to this release. Best Regards, Michael.  -- Michael Sparks, Senior Research Engineer, BBC Research [EMAIL PROTECTED], Kamaelia Project Lead, http

Re: Best way to spawn process on back end computer

2008-10-22 Thread Michael Sparks
sophie_newbie wrote: Hi, I'm running a python cgi script on a frontend web server and I want it to spawn another script (that takes a long time to run) on a backend number crunching server thats connected to the same network. What do you think is the best way to do this? I have a few ideas

Re: [Kamaelia] TCPClient: How to sense connection failure?

2008-01-14 Thread Michael Sparks
Bjoern Schliessmann wrote: Whoops, the TCP client does in fact quit if the server closes connection :) Great - so it wasn't a problem with the TCPClient after all :-) For some reason, my Listener doesn't quit. I thought it's sufficient to exit the main method in some way to quit a

Re: [Kamaelia] TCPClient: How to sense connection failure?

2008-01-12 Thread Michael Sparks
Bjoern Schliessmann wrote: Hello, I'm currently trying to implement a simulation program with Kamaelia and need a reliable TCP connection to a data server. The behaviour you're seeing sounds odd (which is hopefully encouraging :-), but it's not clear from the description whether its a bug in

Re: cloud computing (and python)?

2008-01-02 Thread Michael Sparks
Aaron Watters wrote: (from a gmail account) So cloud computing is java diskless workstations warmed over but less flexible? I'm having trouble understanding why people would want to buy in to this. Why do you like gmail - since you appear to use it? (I can think of several possibilities)

Re: fiber(cooperative multi-threading)

2007-12-28 Thread Michael Sparks
Bjoern Schliessmann wrote: Michael Sparks wrote: All that said, my personal primary aim for kamaelia is to try and make it into a general toolkit for making concurrency easy natural (as well as efficient) to work with. If full blown coroutines turn out to be part of that c'est le vie

Re: fiber(cooperative multi-threading)

2007-12-28 Thread Michael Sparks
Duncan Booth wrote: There are also problems where full blown coroutines are appropriate. The example I quoted earlier of turning a parser from one which generates a lot of callbacks to one which 'yields' tokens is the usual example given. For completeness, I looked at the other half of the

ANN: Axon.STM 1.0.1 (release) Minimalistic Software Transactional Memory (with examples)

2007-12-24 Thread Michael Sparks
of doing the dining philosophers this way :-) Future == This will be merged onto the mainline of Kamaelia with some auxillary functions , as another feather aimed at making concurrency easy to work with :-) Best Regards, Michael. -- Michael Sparks, Kamaelia Project http

ANN: Axon.STM 1.0.1 (release) Minimalistic Software Transactional Memory (with examples)

2007-12-24 Thread Michael Sparks
of doing the dining philosophers this way :-) Future == This will be merged onto the mainline of Kamaelia with some auxillary functions , as another feather aimed at making concurrency easy to work with :-) Best Regards, Michael. -- Michael Sparks, Kamaelia Project http

Re: fiber(cooperative multi-threading)

2007-12-24 Thread Michael Sparks
Duncan Booth wrote: [ snip sections about why the single layer aspect can be helpful ] I'm happy with generators as they are: they're a great solution to a problem that most of us didn't realise we had until the solution came along. That doesn't mean that I wouldn't also like to have a

Re: fiber(cooperative multi-threading)

2007-12-23 Thread Michael Sparks
Duncan Booth wrote: Unfortunately generators only save a single level of stack-frame, so they are not really a replacement for fibers/coroutines. The OP should perhaps look at Stackless Python or Greenlets. See On the surface of things, the single level aspect *LOOKS* like a problem, but in

Re: fiber(cooperative multi-threading)

2007-12-23 Thread Michael Sparks
Hi, It just works, but using native Python threads for non-preemptive threading is not cost-effective. Python has generator instead but it seemed to be very restricted for general scripting. I wish I could write nested (generator) functions easily at least. Is there any plan of

Re: fiber(cooperative multi-threading)

2007-12-23 Thread Michael Sparks
Duncan Booth wrote: Michael Sparks [EMAIL PROTECTED] wrote: Duncan Booth wrote: Unfortunately generators only save a single level of stack-frame, so they are not really a replacement for fibers/coroutines. The OP should perhaps look at Stackless Python or Greenlets. See On the surface

Re: Passing by reference

2007-12-20 Thread Michael Sparks
[EMAIL PROTECTED] wrote: ... the first element of the list to which x refers is a reference to the new string and back outside foo, the first element of the list to which x refers will be a reference to the new string. I'd rephrase that as: * Both the global context and the inside of foo

Re: state machine and a global variable

2007-12-16 Thread Michael Sparks
[EMAIL PROTECTED] wrote: Basically, I agree that often the local state is much more useful. It just seems to me that for some application it's an overkill. Like say, for Turtle [1] (no jokes, please :) or PostScript [2]. Sounds also a bit similar to what happens under the hood in Open GL and

ANN: Axon.STM 1.0.0 (beta) Minimalistic Software Transactional Memory

2007-12-09 Thread Michael Sparks
regarding bugs and logical errors is particularly welcome. (hopefully there aren't any - but it's always hard to spot your own) Thanks == Many thanks to Fuzzyman, Duncan Booth, John J Lee Sylvain Hellegouarch for feedback whilst I was prototyping this. Best Regards, Michael. -- Michael Sparks

Re: Minimalistic Software Transactional Memory

2007-12-09 Thread Michael Sparks
Duncan Booth wrote: Michael Sparks [EMAIL PROTECTED] wrote: I'm interested in writing a simple, minimalistic, non persistent (at this stage) software transactional memory (STM) module. The idea being it should be possible to write such a beast in a way that can be made threadsafe fair

Re: Minimalistic Software Transactional Memory

2007-12-09 Thread Michael Sparks
Fuzzyman wrote: STM seems more in keeping with Kamaelia being generally lock-free. STM isn't lock free - it just abstracts the locks away from the 'user'. You still need to lock around committing the transaction. I perhaps phrased what I meant too tersely. Kamaelia isn't lock free

Re: Minimalistic Software Transactional Memory

2007-12-09 Thread Michael Sparks
John J. Lee wrote: Durus might be worth a look too (though I doubt it's suitable for your situation): http://www.mems-exchange.org/software/durus/ The link to their paper about it seems to be broken, but I think it was based somewhat on ZODB, but is simpler (67k tarball :-). Much

ANN: Axon.STM 1.0.0 (beta) Minimalistic Software Transactional Memory

2007-12-09 Thread Michael Sparks
regarding bugs and logical errors is particularly welcome. (hopefully there aren't any - but it's always hard to spot your own) Thanks == Many thanks to Fuzzyman, Duncan Booth, John J Lee Sylvain Hellegouarch for feedback whilst I was prototyping this. Best Regards, Michael. -- Michael Sparks

Minimalistic Software Transactional Memory

2007-12-08 Thread Michael Sparks
appear least threadsafe, and any general suggestions around that. Full code below. Many thanks for any comments in advance, Michael -- Michael Sparks, Kamaelia Project Lead http://kamaelia.sourceforge.net/Developers/ http://yeoldeclue.com/blog #!/usr/bin/python class ConcurrentUpdate

Re: Minimalistic Software Transactional Memory

2007-12-08 Thread Michael Sparks
. Thanks! Michael. -- Michael Sparks, Kamaelia Project Lead http://kamaelia.sourceforge.net/Developers/ http://yeoldeclue.com/blog -- http://mail.python.org/mailman/listinfo/python-list

Multiple Windows in Pygame, using true concurrency in python via Kamaelia

2007-12-01 Thread Michael Sparks
Hi, Just thought some people may be interested to hear that I've recently been looking at adding true concurrency into Kamaelia, by using Paul Boddie's pprocess as the core mechanism to allow us to run multiple Kamaelia systems in the same app. (Since we have thread based, and co-operative

Greylisting with Kamaelia (was Re: Python North-West meeting - 6 november 18.30)

2007-11-25 Thread Michael Sparks
Giacomo Lacava wrote: New meeting of the Python North-West UK community! This month's talk is: - Michael Sparks on Greylisting with Kamaelia - Just a small note that the slides from this are now up here: http://www.slideshare.net/kamaelian/kamaelia-grey With the main page

Re: Python component model

2006-10-10 Thread Michael Sparks
. -- Michael Sparks, Kamaelia Dust Puppy http://kamaelia.sf.net/ http://yeoldeclue.com/blog -- http://mail.python.org/mailman/listinfo/python-list

Re: Help me use my Dual Core CPU!

2006-09-18 Thread Michael Sparks
Paul Rubin wrote: Ramon Diaz-Uriarte [EMAIL PROTECTED] writes: You might also want to check http://www.lindaspaces.com/products/NWS_overview.html by the guys who invented Linda. Cool, I guess. (The Oz language/Mozart system is a good example of a different and very neat approach to

Invitation: Kamaelia Open Space, Brussels, Sept 22 2006

2006-09-14 Thread Michael Sparks
is interested in the theme, could benefit from coming - for example someone interested in making practical concurrency safer and easier to use in future - please don't hesitate to forward this invitation to them. Hope to see you there! Michael -- Michael Sparks, Senior Research Engineer, BBC Research

Re: beta.python.org content

2006-02-02 Thread Michael Sparks
Kay Schluehr wrote: The new Python site is incredibly boring. Sorry to say this. The old site is/was amateurish but engaged. Now after ~15 years of existence Pythons looks like it wants to be popular among directors of a german job centers. It aims to do everything right but what could be

Python Meet Manchester 8th Feb, Lass O'Gowrie

2006-02-01 Thread Michael Sparks
Hi, This is to announce what looks like it might be the first Python Meet Manchester - should be fun! It's happening NEXT week. * Where: Lass O'Gowrie Pub. Directions: http://tinyurl.com/cp3kv * When: 7pm onwards, Wed 8th Feb If you've been to one in London you know pretty much what to

Re: - E04 - Leadership! Google, Guido van Rossum, PSF

2006-01-04 Thread Michael Sparks
On Wednesday 28 Dec 2005 17:58:33, Robert Kern wrote: ... Sorry to reply to the thread so late in the day, but I noticed (via QOTW :-( ) that Anton got worked up at me suggesting that congratulating someone with a new job was a nice idea (surprised me too - all the Google employees I've met have

Python on GP2X (Linux Based Handheld Console)

2005-12-15 Thread Michael Sparks
Hi, I hadn't seen any announcements regarding this, but there's a little device recently released called a GP2X which is a small dual CPU (2x200Mhz) device which runs Linux. Anyway, I thought there might be someone in here interested to hear that python AND pygame have both been ported to it

ANN: Kamaelia 0.3.0 released!

2005-10-11 Thread Michael Sparks
Kamaelia 0.3.0 has been released! Introduction Kamaelia is a networking/communications infrastructure for innovative multimedia systems. Kamaelia uses a component architecture designed to simplify creation and testing of new protocols and large scale media delivery systems. A subset

Re: Crypto.Cipher.ARC4, bust or me doing something wrong?

2005-09-21 Thread Michael Sparks
Michael J. Fromberger wrote: ... Since ARC4 is a stream cipher, the keystream changes over time -- with ARC4, after each character enciphered. To decrypt successfully, you need to make sure the decrypting keystream exactly matches the encrypting one. ... from Crypto.Cipher import ARC4 as

Re: Crypto.Cipher.ARC4, bust or me doing something wrong?

2005-09-21 Thread Michael Sparks
Paul Rubin wrote: Michael Sparks [EMAIL PROTECTED] writes: I'm looking at using this library and to familiarise myself writing small tests with each of the ciphers. When I hit Crypto.Cipher.ARC4 I've found that I can't get it to decode what it encodes. This might be a case of PEBKAC, but I'm

Re: Free seminar on domain-specific modeling

2005-09-21 Thread Michael Sparks
Martijn Iseger wrote: ... I believe the point being made by the organization is that during computing history the most successful shifts in productivity were achieved by similar shifts in raising the abstraction level on which developers specify solutions. The alternate point is that during

Re: Crypto.Cipher.ARC4, bust or me doing something wrong?

2005-09-21 Thread Michael Sparks
Paul Rubin wrote: Michael Sparks [EMAIL PROTECTED] writes: Rather than re-inventing wheels I thought I'd pick a library sit down and see how pycrypt's meant to be used before actually going anyway. (Amongst other reasons, this is why I suspected me, rather than the library :-) Pycrypt

Crypto.Cipher.ARC4, bust or me doing something wrong?

2005-09-20 Thread Michael Sparks
Hi, I suspect this is a bug with AMK's Crypto package from http://www.amk.ca/python/code/crypto , but want to check to see if I'm being dumb before posting a bug report. I'm looking at using this library and to familiarise myself writing small tests with each of the ciphers. When I hit

Re: Crypto.Cipher.ARC4, bust or me doing something wrong?

2005-09-20 Thread Michael Sparks
Jp Calderone wrote: On Tue, 20 Sep 2005 16:08:19 +0100, Michael Sparks [EMAIL PROTECTED] wrote: Hi, I suspect this is a bug with AMK's Crypto package from http://www.amk.ca/python/code/crypto , but want to check to see if I'm being dumb before posting a bug report. I'm looking at using

Re: Release of Shed Skin 0.0.2: Easy Windows/OSX Installation

2005-09-20 Thread Michael Sparks
Mark Dufour wrote: Shed Skin is an experimental Python-to-C++ compiler. Along with GNU/Linux, version 0.0.2 should now also install easily under Windows 2000/XP and OSX. Please give it a try and let me know if there are still some problems. ss.py writes a make file, but unfortunately doesn't

Re: Software bugs aren't inevitable

2005-09-19 Thread Michael Sparks
Giles Brown wrote: Michael Sparks wrote: The problem that these sorts of approaches don't address is the simple fact that simple creating a formal spec and implementing it, even if you manage to create a way of automating the test suite from the spec *doesn't guarantee that it will do

Re: Roguelike programmers needed

2005-09-18 Thread Michael Sparks
Robert Kern wrote: Thomas Jollans wrote: what exactly is RPG/roguelike etc ? (what debian package provides an example?) Google is your friend. Often a fair answer, but I'd suggest that the question was fair, especially given the OP was seeking help :-) After all, I read the subject line

Re: Software bugs aren't inevitable

2005-09-16 Thread Michael Sparks
Paddy wrote: A work colleague circulated this interesting article about reducing software bugs by orders of magnitude: The problem that these sorts of approaches don't address is the simple fact that simple creating a formal spec and implementing it, even if you manage to create a way of

Re: Software bugs aren't inevitable

2005-09-16 Thread Michael Sparks
Steven D'Aprano wrote: On Thu, 15 Sep 2005 18:07:28 +0100, phil hunt wrote: On Thu, 15 Sep 2005 21:56:06 +1000, Steven D'Aprano [EMAIL PROTECTED] wrote: Are you saying that the recursion done by serious languages is a fake? That it is actually implemented behind the scenes by iteration? It

Re: global interpreter lock

2005-09-15 Thread Michael Sparks
Stephen Thorne wrote: On 15/09/05, Michael Sparks [EMAIL PROTECTED] wrote: At the moment, one option that springs to mind is this: yield WaitDataAvailable(inbox) Twisted supports this. help(twisted.internet.defer.waitForDeferred) Thanks for this. I'll take a look and either we'll

Re: global interpreter lock

2005-09-15 Thread Michael Sparks
Michele Simionato wrote: It looks like I am reinventing Twisted and/or Kamaelia. If it's /fun/ , is that a problem ? ;) (Interesting implementation BTW :) FWIW, I've about a year ago it wasn't clear if we would be able to release our stuff, so as part of a presentation I included a

Re: global interpreter lock

2005-09-14 Thread Michael Sparks
Paul Rubin wrote: ... I don't see how generators substitute for microthreads. In your example from another post: I've done some digging and found what you mean by microthreads - specifically I suspect you're referring to the microthreads package for stackless? (I tend to view an activated

Re: global interpreter lock

2005-09-14 Thread Michael Sparks
[ Second time lucky... ] Paul Rubin wrote: ... I don't see how generators substitute for microthreads. In your example from another post: I've done some digging and found what you mean by microthreads - specifically I suspect you're referring to the microthreads package for stackless? (I tend

Python Bindings for Dirac, (sorta announcement)

2005-09-13 Thread Michael Sparks
Hi, We're in the process of creating python bindings for Dirac. We currently have /decode/ of dirac functioning nicely, so I've packaged up the bindings separately from the rest of the Kamaelia project for those that are interested and would want a play. (Encoding will naturally follow next) To

Re: First release of Shed Skin, a Python-to-C++ compiler.

2005-09-11 Thread Michael Sparks
Mark Dufour wrote: With this initial release, I hope to attract other people to help me locate remaining problems, Well, you did say you want help with locating problems. One problem with this is it doesn't build... If I try and build (following your instructions), I get presented with a

Re: Python versus Perl

2005-09-11 Thread Michael Sparks
Terry Reedy wrote: [...] I am being picky because various people have claimed that Python suffers in popularity because it is known as an 'interpreted language'. So maybe advocates should be more careful than we have been to not reinforce the misunderstanding. I sometimes wonder if it might

Re: First release of Shed Skin, a Python-to-C++ compiler.

2005-09-11 Thread Michael Sparks
Paul Boddie wrote: Michael Sparks wrote: Well, you did say you want help with locating problems. One problem with this is it doesn't build... I found that I needed both the libgc and libgc-dev packages for my Kubuntu distribution - installing them fixed the include issues that you

Re: Video display, frame rate 640x480 @ 30fps achievable?

2005-09-09 Thread Michael Sparks
Guenter wrote: Michael Sparks schrieb: Yes. Co-incidentally we've been looking at video playback this week as well. We've been using Pygame with an Overlay surface, and it works fairly well. I guess Pygame was more suitable overall for your application? It's not really that, it's just

Re: Video display, frame rate 640x480 @ 30fps achievable?

2005-09-08 Thread Michael Sparks
Guenter wrote: I need to develop an application that displays video 640x480 16-bit per pixel with 30 fps it is possible to achieve that frame rate and still have some resources for other processing left? Yes. Co-incidentally we've been looking at video playback this week as well.

Re: reading the last line of a file

2005-09-08 Thread Michael Sparks
Xah Lee wrote: isn't there a way to implement tail in python with the same class of performance? how's tail implemented?: Those crazy open source developers have an implementation here: http://cvs.sourceforge.net/viewcvs.py/mkcdrec/mkcdrec/busybox-0.60.5/Attic/tail.c?rev=1.1view=markup It's

Re: Python versus Perl

2005-09-07 Thread Michael Sparks
Dieter Vanderelst wrote: Dear all, I'm currently comparing Python versus Perl to use in a project that involved a lot of text processing. I'm trying to determine what the most efficient language would be for our purposes. I have to admit that, although I'm very familiar with Python, I'm

Re: dual processor

2005-09-07 Thread Michael Sparks
Jorgen Grahn wrote: On Tue, 06 Sep 2005 08:57:14 +0100, Michael Sparks [EMAIL PROTECTED] wrote: ... Are you so sure? I suspect this is due to you being used to writing code that is designed for a single CPU system. What if you're basic model of system creation changed to include system

Re: dual processor

2005-09-07 Thread Michael Sparks
Thomas Bellman wrote: Michael Sparks [EMAIL PROTECTED] writes: Similarly, from a unix command line perspective, the following will automatically take advantage of all the CPU's I have available: (find |while read i; do md5sum $i; done|cut -b-32) 2/dev/null |sort No, it won't

Re: dual processor

2005-09-06 Thread Michael Sparks
Jeremy Jones wrote: Michael Sparks wrote: Steve Jorgensen wrote: On 05 Sep 2005 10:29:48 GMT, Nick Craig-Wood [EMAIL PROTECTED] wrote: Jeremy Jones [EMAIL PROTECTED] wrote: One Python process will only saturate one CPU (at a time) because of the GIL (global interpreter lock). I'm hoping

Re: dual processor

2005-09-05 Thread Michael Sparks
Steve Jorgensen wrote: On 05 Sep 2005 10:29:48 GMT, Nick Craig-Wood [EMAIL PROTECTED] wrote: Jeremy Jones [EMAIL PROTECTED] wrote: One Python process will only saturate one CPU (at a time) because of the GIL (global interpreter lock). I'm hoping python won't always be like this. I

Re: OpenSource documentation problems

2005-09-02 Thread Michael Sparks
Paul Rubin wrote: Michael Sparks [EMAIL PROTECTED] writes: I've submitted a number of doc bugs to sourceforge and the ones that are simple errors and omissions do get fixed. Cool. Better than nothing, but it's only one class of problem, and maybe the easiest kind to report. [lots

Re: OpenSource documentation problems

2005-09-01 Thread Michael Sparks
Hi Paul, Paul Rubin wrote: Michael Sparks [EMAIL PROTECTED] writes: [[[ some random stuff, /intended/ at supporting people who have contributed docs, rather than saying people who offer constructive suggestions are bad. Possibly badly written. ]]] I've submitted a number of doc bugs

Re: OpenSource documentation problems

2005-09-01 Thread Michael Sparks
A.M. Kuchling wrote: On 1 Sep 2005 05:04:33 -0700, Paul Boddie [EMAIL PROTECTED] wrote: Please note that I'm not labelling you as a troll. No, he's simply barking mad. I was amused by a rec.arts.sf.written discussion [1] where Lee complains that Jonathan Swift (1667-1745)'s writing was

Re: OpenSource documentation problems

2005-08-31 Thread Michael Sparks
Bryan Olson wrote: A plausible theory. I have some possibly-illustrative examples of what I ran into within the last few weeks. hypothetical Did you take what you learnt, and use that to create better documentation to be posted on python's SF project as a patch? /hypothetical (Not aimed at

Re: Release of PyPy 0.7.0

2005-08-30 Thread Michael Sparks
Michael Hudson wrote: ... The chance of any random module you have written being rpython is more or less zero, so it's not _that_ interesting for you to try to compile them with PyPy. I know - the code I use contains LOTS of generators for example, which obviously don't fit the requirements :)

Re: Release of PyPy 0.7.0

2005-08-28 Thread Michael Sparks
Carl Friedrich Bolz wrote: [[... great news ...]] Would it be useful for people to start trying out their modules/code to see if they work with this release, and whether they can likewise be translated using the C/LLVM backends, or would you say this is too early? (I'm more thinking in terms of

Re: Release of PyPy 0.7.0

2005-08-28 Thread Michael Sparks
Valentino Volonghi aka Dialtone wrote: Michael Sparks [EMAIL PROTECTED] wrote: Would it be useful for people to start trying out their modules/code to see if they work with this release, and whether they can likewise be translated using the C/LLVM backends, or would you say this is too

Re: aproximate a number

2005-08-28 Thread Michael Sparks
billiejoex wrote: Hi all. I'd need to aproximate a given float number into the next (int) bigger one. Because of my bad english I try to explain it with some example: 5.7 -- 6 52.987 -- 53 3.34 -- 4 2.1 -- 3 What about 2.0? By your spec that should be rounded to 3 - is that what you

Re: Network performance

2005-08-23 Thread Michael Sparks
Roland Hedberg wrote: What the protocol has to accomplish is extremely simple; the client sends a number of lines (actually a RDF) and the server accepts or rejects the packet. That's all ! ... Now, presently I'm using ( why so is a long history which I will not go into here) and that is a

Re: global interpreter lock

2005-08-22 Thread Michael Sparks
Paul Rubin wrote: Mike Meyer [EMAIL PROTECTED] writes: Even simpler to program in is the model used by Erlang. It's more CSP than threading, though, as it doesn't have shared memory as part of the model. But if you can use the simpler model to solve your problem - you probably should.

Re: ANN: Kamaelia 0.2.0 released!

2005-08-04 Thread Michael Sparks
Terry Reedy wrote: Michael Sparks [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] def updater(interval, message): t = time.time(): while 1: if time.time() - t interval: print message yield None # add this Yes. (I can't believe I missed

Re: ANN: Kamaelia 0.2.0 released!

2005-08-03 Thread Michael Sparks
I've reordered the q's slightly to avoid repetition... Also by answering this question first, it may put the rest of the answer into context better. phil hunt wrote: At what stage of completion is it? This is something we deliberately try to reflect in the version number. Yes, you can build

Re: ANN: Kamaelia 0.2.0 released!

2005-08-03 Thread Michael Sparks
phil hunt wrote: On Wed, 03 Aug 2005 16:57:34 +0100, Michael Sparks [EMAIL PROTECTED] wrote: Is the audience programmers or less technical people? A project that allows non-technical people to build complex network applications is an ambitious one, but not ... It's a little ambitious

Re: ANN: Kamaelia 0.2.0 released!

2005-08-03 Thread Michael Sparks
phil hunt wrote: On Wed, 03 Aug 2005 16:57:34 +0100, Michael Sparks [EMAIL PROTECTED] wrote: ... Which aside from other things means you can't build (say) a video SMIL playback system trivially, yet. Isn't SMIL something that's goinhg to go into web browsers? In which case, you'd

RE: ANN: Kamaelia 0.2.0 released!

2005-08-03 Thread Michael Sparks
Tim Golden wrote: I just wanted to say that I find the ideas behind Kamaelia interesting, and I only wish I had an application for it! Because I'm not especially into media-streaming, I'm more interested in it from the point of view of the generator-based architecture. It's nice to know that

Re: Advanced concurrancy

2005-08-03 Thread Michael Sparks
Peter Tillotson wrote: I've not yet had a chance to try some examples, but i've looked through the documentation. It feels quite familiar, It hopefully should. The approach is based essentially on an asynchronous hardware approach, on the recognition that the fundamental reason that hangs

ANN: Kamaelia 0.2.0 has been released!

2005-08-02 Thread Michael Sparks
Kamaelia 0.2.0 has been released! What is it? === Kamaelia is a collection of Axon components designed for network protocol experimentation in a single threaded, select based environment. Axon components are python generators are augmented by inbox and outbox queues (lists) for

Re: ANN: Kamaelia 0.2.0 released!

2005-08-02 Thread Michael Sparks
Phil Hunt wrote: Kamaelia seems it might be an interesting project. However, I don't think the project is well served by this announcement -- which I find vague and hard to understand. Which is a shame, because it means that other people probably don't understand it very well either, which

ANN: Kamaelia 0.2.0 released!

2005-08-01 Thread Michael Sparks
Kamaelia 0.2.0 has been released! What is it? === Kamaelia is a collection of Axon components designed for network protocol experimentation in a single threaded, select based environment. Axon components are python generators are augmented by inbox and outbox queues (lists) for

Re: Python-cgi web or Perl-cgi script doubt

2005-07-30 Thread Michael Sparks
praba kar wrote: I want to know difference between Python-cgi and Perl-cgi and also I want to which one is efficient from the performance. Possibly the most important difference between the two is when you're using JUST cgi - ie no mod_perl, no mod_python, etc. With python, if your cgi

Re: Python language ver 2.4 , development platform 0.4

2005-07-30 Thread Michael Sparks
Dark Cowherd wrote: The Python language is at ver 2.4 and a thing of beauty. As a development environment IMHO it is probably 0.4 Have you considered looking at any of the commercial IDEs? Personally I *like* command line based systems, but I do know many people who swear by GUI based IDEs. If

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