Twisted September 2001

twisted@python.org

18 participants
66 discussions

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 05 Aug '21

05 Aug '21

hi there, folks: I'd really like to release 0.7.0 but I would like it to be at least a little bit tested before I do so. Could those of you with CVS trees check everything out and see if it performs as advertised? Deeper bugs than that will have to wait for the next release, but I'd at least like to know if it works for someone other than me. Thanks. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

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[Twisted-Python] Questions about twisted.python.delay.Delayed
by Matt Campbell 30 Sep '01

30 Sep '01

Hello, I'm a relatively new user of Twisted (started using it in late August to write a custom server), and I have a few questions about the twisted.python.delay.Delayed class. 1. Why does Delayed measure time in units of five-second ticks by default? 2. Why is Delayed.run() called every five seconds or so even when there are no delayed tasks scheduled? Wouldn't the process's CPU usage be slightly lower if Delayed.timeout() returned None when the queue is empty? 3. What is the recommended way to specify, for example, that a function should be called approximately 30 seconds from now? Should I pass 6 as the number of ticks to Delayed.later(), or is there a better way to do it? Thank you. -- Matt Campbell <http://www.pobox.com/~mattcampbell/>

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[Twisted-Python] NBIO: Java Non-blocking I/O Library
by Itamar Shtull-Trauring 30 Sep '01

30 Sep '01

<http://www.cs.berkeley.edu/~mdw/proj/java-nbio/#copyright>

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[Twisted-Python] Two Zope proposals that may be relevant someday
by Itamar Shtull-Trauring 30 Sep '01

30 Sep '01

http://dev.zope.org/Wikis/DevSite/Proposals/ToleratingHangsAndLeaks http://dev.zope.org/Wikis/DevSite/Proposals/ExtendedForensicLogging

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[Twisted-Python] Earthweb Networking and Communications: Java: Simulating select() in Java
by Itamar Shtull-Trauring 30 Sep '01

30 Sep '01

<http://softwaredev.earthweb.com/java/article/0,,12082_626271,00.html>

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[Twisted-Python] Hacking Reality
by Jason L. Asbahr 30 Sep '01

30 Sep '01

Greetings, Twisted folks, As Chris mentioned, Reality is about to undergo some refactoring. If you are interested in this process, drop a line. Perhaps a new reality-dev list at twistedmatrix.com is in order. For those of you I haven't met yet, I'm a game developer and serious Python addict. I've committed a large portion of my adult life working toward the growth and development of virtual worlds. My current project is the culmination of many years of work. The specific game design I'm working on is called "Netsu" (which is Japanese for "heat" or "fever"). It's an anime-inspired world which incorporates multiple perspectives of play and a reputation network for players to self-organize. It's going to be fun. :-) As I develop use cases and other design documentation for Netsu, I intend to keep them as portable as possible between gaming systems, so that they can benefit the most people. I anticipate this work feeding back into Twisted Reality, expanding it to be a more general simulation framework. And now a little history... The genesis of the project began with my work on virtual reality systems in the early 90's. I developed virtual building walkthroughs for architects, VR games, and created the first hardware accelerated PC-based virtual actor system for Compaq. This work was all done with C and C++, and it was during this period that I realized the need for a dynamic and interactive way to "reach inside" the simulation and manipulate it. And that's how I first became acquainted with Python. :-) The next major phase was to build a 3D client engine with Python embedded as a control language. The fruits of that effort are described in the paper I presented at Python 7, "Beyond: A Portable Virtual World Simulation Framework". (This was also the first mention of 'Netsu'.) In 1998, the next phase of development took a turn when I was recruited into Origin Systems to work on developing the Python foundation for the Ultima Online 2 project. The focus during the period was on innovation on the server side and on client-server communication. The results of that labor are described in another paper presented at Python 9, "Python for Massively Multiplayer Virtual Worlds". [ Both papers at: http://www.asbahr.com/papers.html ] To this point, the software developed was all closed source. The desire for an open source virtual world system was lurking in my head, but it wasn't until the O'Reilly Open Source conference in 2000 that my plan for the open source virtual world crystallized. [ The notes made during that period have evolved into the Linux Journal article which I'll share with you shortly. ] At the 2001 O'Reilly conference, while presenting on the UO2 design work, I took the opportunity to discuss my plans for the future open source virtual world system. The response was extremely positive, which included the invitation to write the LJ article on the subject. :-) Currently, I'm working on combining a number of existing open source technologies to build the new virtual world system. These include the 'Nebula Device' 3D engine from Germany on the client side, the Twisted framework for server-side and client-server communication, and the OpenCyc knowledge base as server-side archetype repository and artificial intelligence server. Glyph and I have been meeting periodically over the last few months to discuss these issues, which intersect nicely with his long term plans for gaming. I've also been meeting with the Cycorp folks (who happen to be just down the road from me) to discuss integrating Cyc and driving Python class generation from Cyc. I'm in the process of integrating Python into the Nebula Device, which will be quickly followed by integrating PB and making Nebula one of the first 3D clients for Twisted. (Yay!) Recently, Chris and I began to share some thoughts. As I mentioned to him, after I wrap up my current consulting project (porting Python to the Playstation 2 and developing a GUI for designers to build Python logic), I'm devoting 100% of my time to Netsu and open source development. I am committed to delivering the next generation open source virtual world framework for gaming, education, simulation, and training. It is my hope that this collaborative approach for virtual world simulation grows, spreading the Twisted word and providing a foundation to help other developers achieve their own goals. Join us! :-) Cheers, Jason

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[Twisted-Python] Curses
by Moshe Zadka 29 Sep '01

29 Sep '01

As the last living dinosaur, I've written a curses module: it's at http://moshez.org/tcurses.py Here is an example usage program: >---------------------------------------------< from twisted.internet import main from twisted.python import delay, log import tcurses import curses log.startLogging(open("twistd.log", "ab+")) screen = tcurses.Screen() protocol = tcurses.WindowProtocol() window = tcurses.LineInput(15, 0, 79) protocol.addWindow(window) screen.setProtocol(protocol) app = main.Application("curses-demo") app.addPort(screen) app.run() >------------------------------------------------< I know it's not exactly a "port", but it's sure close enough in the Twisted scheme of things (IOW, it's got startListening ;-) (and yes, I know LineInput could use a *lot* of work. But it's pretty cool regardless) -- The Official Moshe Zadka FAQ: http://moshez.geek The Official Moshe Zadka FAQ For Dummies: http://moshez.org Read the FAQ

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[Twisted-Python] Roxen Community: RFC 3091 Pi Digit Generation Protocol (Informational)
by Itamar Shtull-Trauring 29 Sep '01

29 Sep '01

We have *got* to support this protocol: <http://community.roxen.com/developers/idocs/rfc/rfc3091.html>

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[Twisted-Python] This is Reality: The Next Generation.
by Chris Armstrong 28 Sep '01

28 Sep '01

Hello, all. Jason Asbahr and I have been collaborating and discussing simulation systems, especially (my interest) a spatial/graphical MMPG system. We've decided the best route to follow right now is to refactor twisted.reality into a Simulation Base and a Text Simulation. We will also create a Spatial Simulation down the road. All of you who are interested in Reality should be perking your ears up right now =). Reality's been stagnant for a while, not seeing any real development, until now. Hopefully this will make Reality a better product in the end. As some of you may know, Jason's got experience in this field, and I'm pretty excited that he's helping us with this. My dream for this project is to be The Open Source Sim Engine, and it just may come about, eventually. =) Anyway, Jason has an article that he's been working on for a while, that he'd like to publish to Linux Journal (and maybe other places) in the near future. It'll be about Simulation environments, and specifically deal with Twisted. He told me he'll be posting it to the list after he works it over a little bit more, to get everyone's reactions. It'd be great if everyone would give a few words about it. Thanks. =) Discussion/documentation on the new MMPG system is on the pound-python wiki. Let's try to keep ideas and discussion about the MMPG system in general there, instead of here on the mailling list. Actual technical things involving Twisted can stay on the ML. Thanks! Oh yeah, the URL -- http://purl.org/wiki/python/OpenMmpg =) Thanks all. If you're interested, give a holler. =) -- Chris Armstrong

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[Twisted-Python] Bug tracker is now live
by Itamar Shtull-Trauring 28 Sep '01

28 Sep '01

http://twistedmatrix.com:9080/twisted/ Email me or glyph with a password (and an informative topic so we know what you're talking about) and we'll set you up an account.

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Twisted September 2001