Mailman 3 October 2002 - Python-announce-list

Lightweight Languages 2002 -- Call for Participation
by Jeremy Hylton Oct. 23, 2002

Oct. 23, 2002

Lightweight Languages Worshop 2002 (LL2) ---------------------------------------- Saturday, November 9, 2002, Room 34-101, MIT, Cambridge, MA http://ll2.ai.mit.edu mailto:ll2@ai.mit.edu CALL FOR PARTICIPATION LL2 will be an intense, exciting, one-day forum bringing together the best programming language implementors and researchers, from both academia and industry, to exchange ideas and information, to challenge one another, and to learn from one another. Agenda ====== Invited Talk: Concurrency Oriented Programming in Erlang - Joe Armstrong, Swedish Institute of Computer Science. >From Scripts to Programs: The Run-Time System, or Lightweight Languages As Lightweight Operating Systems - Matthew Flatt, PLT Supporting Persistent Objects in Python - Jeremy Hylton, Zope Corporation Safe Asynchronous Exceptions for Python - Stephen N. Freund, Williams College, and Mark P. Mitchell, CodeSourcery, LLC Invited Talk: Disruptive Programming Language Technologies - Todd Proebsting, Microsoft Research The Needle Programming Language - Neel Krishnaswami Leveraging Libraries in Lightweight Languages: the Jscheme Experience, Or Why Bambi Snuggles with Godzilla - Kenneth R. Anderson, BBN, and Timothy J. Hickey, Brandeis University, and Geoffrey S. Knauth, BAE Systems, and Gary L. Kratkiewicz, BBN. Invited Talk: The Ruby Programming Language - Yukihiro Matsumoto. IBM Lightweight Services - Christopher Vincent, IBM Internet Technology Why Extension Programmers Should Stop Worrying about Parsing and Start Thinking about Type Systems - David M. Beazley, University of Chicago The Laszlo Application Description Language, LZX - Oliver Steele The workshop starts at 10am. After the workshop, there will be an evening social event and dinner. See the web page for the detailed schedule. To register, simply send mail to ll2-register(a)ai.mit.edu We are currently hoping for sufficient sponsorship to avoid charging admission to the workshop. Closer to Nov. 9th we will state whether or not there will be a minimal registration fee (just to cover food). Program Committee ================= Paul Graham, Arc Jeremy Hylton, Zope Corp. Shriram Krishnamurthi, Brown University Mike Salib, MIT Olin Shivers, Georgia Tech. Dan Sugalski, Perl Foundation Greg Sullivan (chair), MIT AI Lab Dan Weinreb, BEA Systems, Inc.

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ANNOUNCE: elspy 0.1.1 released
by Greg Ward Oct. 22, 2002

Oct. 22, 2002

elspy 0.1.1 ----------- elspy is a layer of glue code that enables you to write Python code to scan email messages at SMTP-time with the Exim MTA (mail transport agent). elspy also includes a small Python library with common mail-scanning tools, including an interface to SpamAssassin and a simple-but-effective virus detector. Exim is a highly flexible and customizable MTA (mail transport agent) for Unix Internet email servers. One of the new features in Exim 4.0 was the local_scan() API, which allows sites to supply custom code for scanning messages at SMTP time, accepting or rejecting them based on message content. Normally, you have to write the local_scan() function in C. Python is a high-level, extensible, embeddable, object-oriented programming language. Scanning email is a great example of something that you can do in any decent programming language, but do a lot more easily in Python than in C. The core of elspy is a C local_scan() function that embeds a Python interpreter in Exim, allowing you to write your own local_scan() function in Python instead of C. REQUIREMENTS ------------ elspy requires Exim 4.0 or greater, and Python 2.0 or greater. WEB PAGE & MAILING LIST ----------------------- You can find the latest version of elspy here: http://elspy.sourceforge.net/ To report bugs, submit patches, browse the CVS, etc., please use the SourceForge project page: http://sourceforge.net/projects/elspy For help using elspy, or to discuss future development ideas, please join the elspy-users mailing list: http://starship.python.net/mailman/listinfo/elspy-users You can post to the list by sending mail to elspy-users(a)python.net. CHANGES ------- * Fix serious bug in header_add() and log_write() wrappers: they failed to escape '%' characters in the passed-in string, which could cause Exim to dump core since it treats those strings as format strings. * Change to accept messages by default if there's any Python problem, not just an import problem. Made this behaviour a bit more customizable with some #define's at the top of elspy.c -- Greg Ward <gward(a)python.net> http://www.gerg.ca/ Any priest or shaman must be presumed guilty until proven innocent.

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Twisted 1.0 Developer Platform -- The Framework of Your Internet
by Glyph Lefkowitz Oct. 22, 2002

Oct. 22, 2002

What is Twisted? ================ Twisted is an event-driven framework for building networked clients and servers. It contains a powerful and simple networking core, a full-featured suite of interoperable protocols, among them a powerful web server and applications framework. Twisted integrates with a wide range of Python code. Popular graphical toolkits (including Qt, Win32, and GTK+), application servers (including Zope3 and Quixote), and database backends (any DB-API 2.0 compliant driver) can run in concert with a Twisted application. Hundreds of unit tests ensure that Twisted remains stable and production-ready from release to release. In addition, Twisted has automated acceptance tests to ensure continued interoperability with common third-party networking tools, and to test end-to-end functionality. What is the Twisted Developer Platform 1.0 Release? =================================================== With the 1.0.0 release, Twisted is finalizing several core interfaces important to server and client developers. While some areas of Twisted are still under active development, the event loop and all associated APIs are now stable and ready for third-party developers to use. A press release detailing the 1.0 release is available here: http://www.zoteca.com/Press/prtwisted10.pdf Who's Using Twisted? ==================== "You guys have a big problem, because [setting up a NNTP server] was way too easy to do! How are you going to make the big consulting bucks? :) You guys rock!" - Barry Warsaw, Zope Corporation "I was lucky to be finalizing "Python in a Nutshell" at just the right time to include some coverage of twisted.internet. I think asynchronous (event-driven) programming deserves wider exposure and wider use, and twisted.internet is a great way to implement event-driven network servers (and clients, too, though I did not cover that side of Twisted)." - Alex Martelli, A.B. Strakt "Twisted is built on solid foundations, and we hope to use in Zope 3." - Shane Hathaway, Zope Corporation "[Twisted] was by far the easiest framework to develop with, debug under, and extend for our purposes to support protocols such as SOAP, HTTP, and Macromedia Flash-compatible XML Sockets." - Bob Ippolito, CTO, Masters of Branding "We have selected Twisted as our framework because of its pluggable, asynchronous protocols, support for multiple interfaces and protocols per service, integration with PostgreSQL, and just generally excellent layered architecture." - Stephen C. Waterbury, NASA Read more at http://www.twistedmatrix.com/services/success What Does It Come With? ======================= Twisted supports many event loops for both server apps and GUI integration on the client side, including: - select() - poll() - kqueue on FreeBSD - Win32 events, including GUI support - GTK+ - Qt - wxPython - Tkinter - Java Twisted can run protocols over TCP, SSL, Unix sockets and subprocesses. It also includes scheduling support, threading integration, RDBMS event loop integration and other basic requirements for networked applications. Also included are implementations of many protocols. In some cases this includes complete frameworks providing facilities on top of the base protocol: - SSH - FTP - HTTP, including a complete web framework - XML-RPC server framework - NNTP and complete NNTP server framework - SOCKSv4 (server only) - SMTP - IRC - telnet - POP3 - AOL's instant messaging TOC - OSCAR, used by AOL-IM as well as ICQ (client only) - DNS (experimental) - MouseMan serial mice - Twisted Perspective Broker, a remote object protocol Get Twisted =========== Visit us on the web: http://www.twistedmatrix.com Mailing list: http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python IRC: #twisted on irc.freenode.net Twisted Fun =========== http://isometric.spaceninja.com/_/twisted_plutonium/ -- | <`'> | Glyph Lefkowitz: Travelling Sorcerer | | < _/ > | Lead Developer, the Twisted project | | < ___/ > | http://www.twistedmatrix.com |

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ZODB 3.1b3 announced
by Jeremy Hylton Oct. 21, 2002

Oct. 21, 2002

I am pleased to announce the third and final beta releases of ZODB3 and ZEO2. These last beta releases were prompted by last minute problems with ZEO signal handling and the FileStorage restore() method. See NEWS.txt and ZEO-NEWS.txt for details. The final release will be on Friday. Please give the betas a try before then! ZODB is an object database for Python that provides transactional persistence while requiring few, if any, changes to application logic. ZEO is a client-server storage system for ZODB. The ZEO2 package is released on its own and as part of ZODB3. The separate release is for Zope users, who already have ZODB. You can get source releases from http://www.zope.org/Products/StandaloneZODB and http://www.zope.org/Products/ZEO. The ZODB3 release requires a C compiler, while the ZEO2 release is pure Python. The components you get with the ZODB3 release are as follows: - Core ZODB, including the persistence machinery - Standard storages such as FileStorage - Supporting modules such as ExtensionClass - The persistent BTrees modules - ZEO (versions 1 and 2) - Experimental Berkeley storages - Updated documentation The beta release contains roughly the same version of ZODB that was included in Zope 2.6. The two releases are not directly coordinated, so there may be some subtle differences. Many people have contributed to ZODB3. Special thanks to Toby Dickenson for the new ZODB Connection cache. Many people at Zope Corp. have contributed code and tested unreleased versions. Jeremy

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ANN: disipyl plotting library - 0.8
by paul m Oct. 21, 2002

Oct. 21, 2002

DESCRIPTION: ----------- disipyl is an object-oriented wrapper around the DISLIN plotting library. DISLIN is a powerful and flexible multiplatform (Win32, Unix, Linux, etc.) library designed for displaying scientific data. DISLIN's author, Helmut Michels, has made available a DISLIN plotting extension for the Python programming language (see http://www.linmpi.mpg.de/dislin/ for more details). disipyl provides a set of classes which represent various aspects of DISLIN plots, as well as providing some easy to use classes for creating commonly used plot formats (e.g. scatter plots, histograms, 3-D surface plots). A major goal in designing the library was to facilitate interactive data exploration and plot creation. Documentation, a tutorial, and a demo program are included. The library has been tested on Win32, Linux, and FreeBSD, but I anticipate that it should work on any platform which can make use of Python, NumPy, and the DISLIN python extensions. Feedback, comments, and critique are gladly accepted (email: paul.magwene(a)yale.edu). VERSION: ------- This is release 0.8 of disipyl. CHANGES: ------- New in this release: * Added bugfixes and CanvasMultiPlot class submitted by Martin Lüthi * Added setCharacterCode function submitted by Martín Argañaraz for using alternate character encodings URL: ---- You can find disipyl at: http://pantheon.yale.edu/~pmm34/disipyl.html .

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ANNOUNCE: framesets 2.0 for python
by crisfugate＠webtv.net Oct. 21, 2002

Oct. 21, 2002

I would like to announce the availability of framesets 2.0 for python. Please go to http://fsetstek.tripod.com for more details. Cris Fugate crisfugate(a)webtv.com

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ANN: empy 2.1 -- Python templating system
by Erik Max Francis Oct. 19, 2002

Oct. 19, 2002

Summary empy is a system for embedding Python expressions and statements in template text; it takes an empy source file, processes it, and produces output. This is accomplished via expansions, which are special signals to the empy system and are set off by a special prefix (by default the at sign, '@'). empy can expand arbitrary Python expressions and statements in this way, as well as a variety of special forms. Textual data not explicitly delimited in this way is sent unaffected to the output, allowing Python to be used in effect as a markup language. Also supported are "hook" callbacks, recording and playback via diversions, and dynamic, chainable filters. The system is highly configurable via command line options and embedded commands. Expressions are embedded in text with the '@(...)' notation; variations include conditional expressions with '@(...?...:...)' and the ability to handle thrown exceptions with '@(...$...)'. As a shortcut, simple variables and expressions can be abbreviated as '@variable', '@object.attribute', '@function(arguments)', '@sequence' [index], and combinations. Full-fledged statements are embedded with '@{...}'. Forms of conditional, repeated, and recallable expansion are available via '@[...]'. A '@' followed by a whitespace character (including a newline) expands to nothing, allowing string concatenations and line continuations. Comments are indicated with '@#' and consume the rest of the line, up to and including the trailing newline. '@%' indicate "significators," which are special forms of variable assignment intended to specify per-file identification information in a format which is easy to parse externally. Escape sequences analogous to those in C can be specified with '@\...', and finally a '@@' sequence expands to a single literal at sign. Getting the software The current version of empy is 2.1. The latest version of the software is available in a tarball here: http://www.alcyone.com/pyos/empy/empy-latest.tar.gz. The official URL for this Web site is http://www.alcyone.com/pyos/empy/. Requirements empy should work with any version of Python from 1.5.x onward. License This code is released under the GPL. .... Release history [since 2.0] - 2.1; 2002 Oct 18. 'empy.atExit' registry separate from hooks to allow for normal interpreter support; include a benchmark sample and test.sh verification script; expose 'empy.string' directly; -D option for explicit defines on command line; remove ill-conceived support for '@else:' separator in '@[if ...]' substitution; handle nested substitutions properly; '@[macro ...]' substitution for creating recallable expansions. - 2.0.1; 2002 Oct 8. Fix missing usage information; fix after_evaluate hook not getting called; add 'empy.atExit' call to register values. -- Erik Max Francis / max(a)alcyone.com / http://www.alcyone.com/max/ __ San Jose, CA, USA / 37 20 N 121 53 W / &tSftDotIotE / \ Sit loosely in the saddle of life. \__/ Robert Louis Stevenson Alcyone Systems / http://www.alcyone.com/ Alcyone Systems, San Jose, California. .

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Python Meetup Day
by matt meeker Oct. 18, 2002

Oct. 18, 2002

Hi, This is Matt from Meetup. Many Python programmers have written to us and suggested we create International Python Meetup Day, a chance for Python programmers worldwide to meet each other locally, in 532 cities across 27 countries. We listened, and the first International Python Meetup Day is November 14th at 7:00pm local time everywhere. See the details here: http://python.meetup.com/ Please let me know of any questions or ideas of how we can make this better for you. Thanks, -matt ----------------------- matt meeker, co-founder MEETUP (www.meetup.com) email: matt(a)meetup.com ----------------------- <P><A HREF="http://python.meetup.com">Python Meetup Day</A> - Python Meetup Day is November 14th at 7:00pm, in 532 cities worldwide! (18-Oct-02)

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RELEASED ht2html 2.0
by barry＠zope.com Oct. 18, 2002

Oct. 18, 2002

ht2html is the web templating system we use to build the www.python.org web pages. Lots of other sites use the system as well. It's fairly dumb -- in a good way -- so it's also pretty easy to build static sites with a consistent look. Until now, the code has only been available by CVS checkout in the SourceForge project http://sf.net/projects/ht2html but that is pretty inconvenient for a lot of people, so I just created a tarball for download and tagged it version 2.0. At some point we may get motivated to make a real distutils package out of it. Download the tarball from http://sf.net/project/showfiles.php?group_id=46757 or visit the project home page, which contains all the documentation there is <wink>, at http://ht2html.sf.net Enjoy, -Barry

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ANN: eGenix.com mxCGIPython Version 0.7.0
by M.-A. Lemburg Oct. 18, 2002

Oct. 18, 2002

________________________________________________________________________ ANNOUNCING: eGenix.com mxCGIPython Version 0.7.0 An easy-to-install one-file Python Interpreter ________________________________________________________________________ WHAT IS IT ?: mxCGIPython is a project to provide a complete ready-to-run Python interpreter in one single executable file. The main intent for supplying such a single file executable is to ease deployment of Python for CGI scripting even when the ISP is not willing or able to install Python for you. The mxCGIPython archive contains everything needed to build the one file interpreter. The web page provides a set of links to contributed binaries for direct use in addition to setup instructions to get the binaries up and running at your ISP. See the documentation page for a list of available binary packages. Binaries for new platforms are always welcome :-) ________________________________________________________________________ WHAT'S NEW ? Version 0.7.0 now includes all standard Python packages (except the test package), so it should work as full replacement for the standard Python binary. Oleg Broytmann has kindly compiled new versions of cgipython built on Python 2.2.2. ________________________________________________________________________ WHERE CAN I GET IT ? The download archives and instructions for installing the packages can be found at: http://www.egenix.com/files/python/ ________________________________________________________________________ WHAT DOES IT COST ? The packages comes with a Python 2.0 style license, which means that you can use them in both commercial and non-commercial settings without fee or charge. The binaries are covered by the usual Python licenses. ________________________________________________________________________ WHERE CAN I GET SUPPORT ? Free support is available through the eGenix.com User Mailing List which provides a forum for eGenix.com Software Users: http://lists.egenix.com/mailman/listinfo/egenix-users/ Commercial quality support for these packages is available from eGenix.com Software GmbH. Please see http://www.egenix.com/files/python/eGenix-mx-Extensions.html#Support for details about the eGenix support offerings. ________________________________________________________________________ Enjoy, -- Marc-Andre Lemburg CEO eGenix.com Software GmbH ______________________________________________________________________ Company & Consulting: http://www.egenix.com/ Python Software: http://www.egenix.com/files/python/

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