Mailman 3 September 2004 - Python-announce-list

[ANNOUNCE] gmpy 1.0 alpha released
by Alex Martelli 13 Nov '05

13 Nov '05

See http://gmpy.sourceforge.net/ for details. What is it: a wrapper for the GMP library, to provide multi-precision arithmetic for Python. Multi-precision floats, and unbounded-precision rationals, are not present in stock Python; multi-precision integers ('long') are, but gmpy's version of multi-precision integers is faster for some operations (NOT all -- used to be, but Python 2.3 did serious enhancements to some operations on longs) and provides lots of nifty pre-packaged additional functions. Minor changes and bug-fixes since the latest 0.9 pre-alpha; support for Python 2.3. The Windows binary release is now for Python 2.3 _only_ (if you're stuck with Python 2.2 on Windows, you can keep using gmpy 0.9 pre-alpha and not really suffer from that). Known bug on Windows: the scan0 and scan1 functions appear broken (perhaps related to the lack of a GMP 4.0 library for Windows -- haven't found one around yet). Alex

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ANN: PyOpenOffice 0.2 released
by me.simon＠t-online.de 30 Sep '04

30 Sep '04

New in release 0.2: # Replace pictures - generate catalogues, worksheets, photo galleries etc. from an SXW-Template. # Patch for makeSerialLetters() to make it usable with Asian fonts (no PDF support for such fonts yet). Have a look at: http://www.bezirksreiter.de/PyOpenOffice.htm Martin Simon

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Dr. Dobb's Python-URL! - weekly Python news and links (Sep 29)
by Cameron Laird 29 Sep '04

29 Sep '04

QOTW: "You *did* signal that quite adequately. This, however, is comp.lang.python and clear signals never stopped anyone. <wink>" Peter Hansen "I think that the problem with debuggers is the same as with optimization -- it's too easy to start doing it prematurely." Carlos Ribeiro Gerrit Holl lists subtleties of a "straightforward" problem, and starts to solve them: http://www.google.com/groups?selm=mailman.4001.1096357473.5135.python-list%… A workshop on High Productivity Python on 12 October might still have openings for presentations. http://groups.google.com/groups?th=bc16bbd85b4d10d9 Dabo is "a true three-tier design" portable wxPython-based freely-available framework. http://groups.google.com/groups?th=78be1e32fa9ac645 Vinay Sajip explains that logging is easier than its documentation has made it appear to be. http://groups.google.com/groups?selm=JqSdnXgsbLTkosXcRVn-vw%40powergate.ca Resumable exceptions are too complicated for Python--probably. http://groups.google.com/groups?frame=left&th=eebe9a8d1fee47f5 How does one get the zip module to do something useful? Adept Pythoneers start the way they start with *all* questions: by asking the module to explain itself. http://groups.google.com/groups?frame=left&th=586b1ae0d7d403cc http://groups.google.com/groups?frame=left&th=5814e0fbe3ef7679 http://groups.google.com/groups?frame=left&th=8f06411b073cf498 ======================================================================== Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce Brett Cannon continues the marvelous tradition established by Andrew Kuchling and Michael Hudson of intelligently summarizing action on the python-dev mailing list once every other week. http://www.python.org/dev/summary/ The Python Package Index catalogues packages. http://www.python.org/pypi/ The somewhat older Vaults of Parnassus ambitiously collects references to all sorts of Python resources. http://www.vex.net/~x/parnassus/ Much of Python's real work takes place on Special-Interest Group mailing lists http://www.python.org/sigs/ The Python Business Forum "further[s] the interests of companies that base their business on ... Python." http://www.python-in-business.org Python Success Stories--from air-traffic control to on-line match-making--can inspire you or decision-makers to whom you're subject with a vision of what the language makes practical. http://www.pythonology.com/success The Python Software Foundation (PSF) has replaced the Python Consortium as an independent nexus of activity. It has official responsibility for Python's development and maintenance. http://www.python.org/psf/ Among the ways you can support PSF is with a donation. http://www.python.org/psf/donate.html Cetus collects Python hyperlinks. http://www.cetus-links.org/oo_python.html Python FAQTS http://python.faqts.com/ The Cookbook is a collaborative effort to capture useful and interesting recipes. http://aspn.activestate.com/ASPN/Cookbook/Python Among several Python-oriented RSS/RDF feeds available are http://www.python.org/channews.rdf http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi http://python.de/backend.php For more, see http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all The old Python "To-Do List" now lives principally in a SourceForge reincarnation. http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse http://python.sourceforge.net/peps/pep-0042.html The online Python Journal is posted at pythonjournal.cognizor.com. editor(a)pythonjournal.com and editor(a)pythonjournal.cognizor.com welcome submission of material that helps people's understanding of Python use, and offer Web presentation of your work. *Py: the Journal of the Python Language* http://www.pyzine.com Archive probing tricks of the trade: http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100 http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.pyth… Previous - (U)se the (R)esource, (L)uke! - messages are listed here: http://www.ddj.com/topics/pythonurl/ http://purl.org/thecliff/python/url.html (dormant) or http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lan… Suggestions/corrections for next week's posting are always welcome. E-mail to <Python-URL(a)phaseit.net> should get through. To receive a new issue of this posting in e-mail each Monday morning (approximately), ask <claird(a)phaseit.net> to subscribe. Mention "Python-URL!". -- The Python-URL! Team-- Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and sponsor the "Python-URL!" project.

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ANN: Scimitar 0.9.0
by Uche Ogbuji 29 Sep '04

29 Sep '04

http://uche.ogbuji.net/tech/4Suite/scimitar Scimitar is an implementation of ISO Schematron that compiles a Schematron schema into a Python validator script, making it a faster and somewhat more flexible approach than the usual XSLT implementations. http://www-106.ibm.com/developerworks/edu/x-dw-xschematron-i.html http://www.ascc.net/xml/resource/schematron/schematron.html Schematron is an XML schema language in which you express a set of rules that the document must meet, rather than expressing a full grammar for the XML vocabulary (which is the more common approach to XML schemata). It is by far the most flexible XML schema language available. Scimitar now support all of the draft ISO Schematron specification. It will go through a mostly-bug-fix phase until the 1.0 release. See the TODO file for known gaps in Scimitar functionality and convenience. Scimitar is open source, provided under the 4Suite variant of the Apache license. The compiler program runs standalone on Python 2.2 or more recent, although if you are using an earlier version than 2.3, you must also install Optik 1.4.1 or more recent. In addition to the above requirements the generated validators require 4Suite 1.0a3 or more recent (really only tested with latest 4Suite CVS). -- Uche Ogbuji Fourthought, Inc. http://uche.ogbuji.net http://4Suite.org http://fourthought.com A hands-on introduction to ISO Schematron - http://www-106.ibm.com/developerworks/edu/x-dw-xschematron-i.html Wrestling HTML (using Python) - http://www.xml.com/pub/a/2004/09/08/pyxml.html XML circles the globe - http://www.javareport.com/article.asp?id=9797 Principles of XML design: Considering container elements - http://www-106.ibm.com/developerworks/xml/library/x-contain.html Hacking XML Hacks - http://www-106.ibm.com/developerworks/xml/library/x-think26.html A survey of XML standards - http://www-106.ibm.com/developerworks/xml/library/x-stand4/

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Snakehandlers.net Python Forum
by Sheldon Plankton 28 Sep '04

28 Sep '04

Hi, http://snakehandlers.net is a place for people to ask Python questions, post Tutorials, and chat with other snake handlers :) Please drop by and post a question. Plankton

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ANNOUNCE: SpamBayes release 1.0
by Tony Meyer 28 Sep '04

28 Sep '04

The SpamBayes team is pleased to announce the 1.0 release of SpamBayes. As is now usual, this is both a release of the source code and of an installation program for all Microsoft Windows users. The Windows installation program will install either the Outlook add-in (for Microsoft Outlook users), or the SpamBayes server program (for all other POP3 mail client users, including Microsoft Outlook Express). All Windows users (including existing users of the Outlook add-in) are encouraged to use the installation program. If you wish to use the source-code version, you will also need to install Python - see README.txt in the source tree for more information. This release includes no changes from the successful (but now rather dated) 1.0rc2 release. However, we still highly recommend that existing users upgrade to the final version. Work has already begun towards the first 1.1 release, and we expect to release a (bug fix only) 1.0.1 release around the same time as 1.1a1. September 2004 is Spambayes' 2nd birthday, and (as many users know) we have gone through a very long release process, including 8 alpha releases, a beta, and two release candidates, all tested by a large number of users. As such, we are very confident that this 1.0 release is stable and suitable for regular use. We do welcome any and all contributions for improvements, of course! Get it via the 'Download' page at http://spambayes.org/download.html Enjoy the new release and your spam-free mailbox :-) Thanks to everyone involved in this release, particularly Richie Hindle and Kenny Pitt! Tony. (on behalf of the SpamBayes team) --- What is SpamBayes? --- The SpamBayes project is working on developing a Bayesian (of sorts) anti-spam filter (in Python), initially based on the work of Paul Graham. The major difference between this and other, similar, projects is the emphasis on testing newer approaches to scoring messages. The project includes a number of different applications, all using the same core code, ranging from a plug-in for Microsoft Outlook, to a POP3 proxy, to various command-line tools.

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Middleware'04 early registration extended
by Middleware 04 27 Sep '04

27 Sep '04

******************************************************************* * Middleware early registration deadline has been extended to * * Thursday, September 30th (3 days from now) * * * * Wednesday, October 6th: online registration closes * ******************************************************************* ACM/IFIP/USENIX Middleware 2004 Call for Participation Renaissance Toronto Hotel at SkyDome Toronto, Ontario, Canada October 18th - 22nd, 2004 http://www.eecg.utoronto.ca/middleware2004/ Important Dates: Early Registration Rate Ends: 30 September 2004 (extended) Last Day to Pre-Register: 06 October 2004 Hotel Cut-Off Date: 25 September 2004 Hotel room reservations (Canada/US): 1-800-237-1512 Program Summary: For details and exact dates see: http://www.eecg.utoronto.ca/middleware2004/ Keynotes: How Wrong Can You Be? Getting Lost on the Road to Massive Scalability Werner Vogels, Director of Systems Research, Amazon.com Experiences Building a 24x7 Real-time ASP Service at Citrix Online Thorsten von Eicken, Chief Architect, Citrix Online Aspect-Oriented Programming - The promise and the controversy Gregor Kiczales, University of British Columbia Main conference program Single-track conference with 26 technical paper presentations and 6 work-in-progress presentations. For details see http://www.eecg.toronto.edu/middleware2004/programstruct.htm Tutorials (Monday and Tuesday): Building Distributed .NET Applications - Technologies, Architecture, Comparison with J2EE. By Michael Stal, Siemens AG Germany (Monday, full day.) Getting Started with Aspect-Oriented Programming for Middleware. By Yvonne Coady, University of Victoria, Canada (Monday, morning.) Middleware and Data Management for Sensor Networks. By Nalini Venkatasubramanian, University of California, Irvine, USA and Sharad Mehrotra,University of California, Irvine, USA (Tuesday, morning.) Enterprise Integration Patterns: Asynchronous Messaging Architectures in Practice. By Gregor Hohpe, ThoughtWorks Inc., USA (Tuesday, morning.) Data Grid Management Systems. By Arun Swaran Jagatheesan, University of California, San Diego, USA (Tuesday, afternoon.) DDS: The Real-Time Publish-Subscribe Standard for Data Distribution By Gerardo Pardo-Castellote, Real-Time Innovations Inc., USA (Tuesday, afternoon.) Workshops (Monday and Tuesday): 2nd Workshop on Middleware for Grid Computing. Organizers: Bruno Schulze - National Scientific Computing Laboratory (Brazil) and Radha Nandkumar - NCSA/UIUC (USA) (Monday, October 18th.) 2nd Workshop on Middleware for Pervasive and Ad-Hoc Computing Organizer: Paddy Nixon - Strathclyde University (UK) (Monday, October 18th.) 3rd Workshop on Adaptive and Reflective Middleware. Organizer: Fabio Costa, Federal University of Goi�s - (Brazil) and Nanbor Wang - Tech-X Corporation (USA) (Tuesday, October 19th.) 1st Middleware Doctoral Symposium. Organizers: Edward Curry - National University of Ireland (Ireland) and Doug Lea - SUNY Oswego (USA) (Tuesday, October 19th.) ---

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ANN: Nevow 0.3 released
by Valentino Volonghi aka Dialtone 27 Sep '04

27 Sep '04

GET it here: http://www.nevow.com/releases/0.3.0/nevow-0.3.tar.gz More Informations: Nevow (pronounced nou-veau) is a web application construction kit written in Python. It is designed to allow the programmer to express as much of the view logic as desired in Python, and includes a pure Python XML expression syntax named stan to facilitate this. However it also provides rich support for designer-edited templates, using a very small XML attribute language to provide bi-directional template manipulation capability. Nevow also includes formless, a declarative syntax for specifying the types of method parameters and exposing these methods to the web. Forms can be rendered automatically, and form posts will be validated and input coerced, rendering error pages if appropriate. Once a form post has validated successfully, the method will be called with the coerced values. Finally, Nevow includes LivePage, a two-way bridge between JavaScript in a browser and Python on the server. For 0.3, LivePage has been updated to operate on Mozilla, Firefox, Windows Internet Explorer 6, and Safari on Mac OS X. Event handlers can be written in pure Python and JavaScript implementation details are hidden from the programmer, with Nevow taking care of routing data to and from the server using XmlHttpRequest. * XHTML templates: contain no programming logic, only nodes tagged with nevow attributes * data/render methods: simplify the task of separating data from presentation and writing view logic * stan: An s-expression-like syntax for expressing xml in pure python * formless: For describing the types of objects which may be passed to methods of your classes, validating and coercing string input from either web or command-line sources, and calling your methods automatically once validation passes * webform: For rendering web forms based on formless type descriptions, accepting form posts and passing them to formless validators, and rendering error forms in the event validation fails * livepage: Cross-browser JavaScript glue for sending client side events to the server and server side events to the client after the page has loaded, without causing the entire page to refresh Links: ML: http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-web Bug Tracker: http://divmod.org/users/roundup.twistd/nevow/ IRC: irc://irc.freenode.net/#twisted.web Commits: http://divmod.org/users/mailman.twistd/listinfo/nevow-commits Homepages: http://www.nevow.com http://www.divmod.org/Home/Projects/Nevow/index.html What's New in Nevow 0.3: 2004-09-26 Donovan Preston <dp(a)divmod.org> * Added nevow.inevow.IQ interface, an interface for querying the stan DOM. Eventually, this interface will contain APIs for doing traditional DOM introspection, such as iterating children, examining tag names, and examining attributes. For now, it contains only the patternGenerator, onePattern, and allPatterns APIs. These APIs have been deprecated from Context. The main benefit of this is the ability to do: IQ(loaders.xmlfile(...)).patternGenerator(...) which would be nice for creating "pattern library" files containing common skin idioms which can then be copied and used throughout the app. 2004-09-25 Donovan Preston <dp(a)divmod.org> * Chatola received a major facelift, bringing it from cool demo up to almost a full fledged web-based chat server. The helper API LiveEvil.call(...) was added, which deprecates LiveEvil.sendScript(callJS(...)) 2004-09-23 Tommi Virtanen <tv(a)twistedmatrix.com> * Make guard.SessionWrapper store its URL location in all requests it passes to its children. This allows the children know where to post the __login__ and __logout__ forms, even deep inside the resource tree (fixes issue59). * Guard now works as a non-root resource, with help from the above change. Semantics of __login__ clarified in unit tests; if your guard is at /foo, posting to /foo/__login__ redirects to /foo, and posting to /foo/__login__/ redirects to /foo/. The two unit tests that failed earlier now pass (with that change in their __login__ URLs). * If URL-based sessions are used, login no longer loses session information due to redirect to / (fixes issue56). 2004-09-20 Matt Goodall <matt(a)pollenation.net> * Added URL.secure() method to make switching between http and https easier. 2004-09-08 Donovan Preston <dp(a)divmod.org> * Nevow now includes a very simple proof-of-concept WSGI Application implementation, and can be used with no Twisted dependency. Nevow can also be used to write CGIs, either using a simple CGI WSGI gateway (which supports URL traversal), or by using Page.renderString (which does not). * Two new context interfaces, ICurrentSegments and IRemainingSegments, replace the need to examine the Request prepath and postpath attributes directly. * ISerializable is deprecated, and has been replaced with a simple Flattener registry. nevow.flat.registerFlattener and nevow.flat.getFlattener have been added to support this. 2004-09-06 Donovan Preston <dp(a)divmod.org> * BACKWARDS INCOMPATIBLE CHANGE. Page.configurable_ *always* returns self, and a new Page.configurable_original *always* returns self.original. If you were relying on Page.configurable_'s introspection behavior and are now getting errors about adapting to IConfigurable, change your renderForms() calls to: renderForms('original') This causes Page.configurable_original to be invoked and introspected for form rendering. 2004-08-23 Donovan Preston <dp(a)divmod.org> * LivePage uses a simpler implementation strategy which requires the browser to make one request per output event. As a result, LivePage now works on Mozilla, Safari, and Internet Explorer Windows. 2004-08-05 Donovan Preston <dp(a)divmod.org> * Implemented support for IFoo(ctx) synonym syntax. It does the same thing as ctx.locate(IFoo) * Removed Resource Generators, a feature of NevowSite that nobody used and wasn't really useful. * Changed all inevow.IResource apis to take a Context object where they used to take the request. Remembering objects in PageContexts is now much easier, and fewer hacks are required to build the context chain. The context chain now looks like: SiteContext->RequestContext->PageContext(s)->WovenContext(s) 2004-7-28 Donovan Preston <dp(a)divmod.org> * Parameterize data_* methods in the same way as render_* methods. Patch by k3mper. For example, <div nevow:data="foo bar,baz" /> will cause data_foo(self, bar, baz) to be called with the strings "bar" and "baz". This data method should return a callable taking ctx, data. The return value of this callable will be remembered as IData at this point in the context stack. * Added list-slicing support to ListContainer. You may now use list slicing syntax in a data directive in addition to a simple index. For example: def data_aList(self, ctx, data): return ["Buckle", "My", "Shoe"] <div nevow:data="aList"> <span nevow:data="1:-1" nevow:render="string" /> </div> Will render as <div><span>My</span></div> 2004-7-20 Matt Goodall <matt(a)pollenation.net> * Modified sax loader to retain doctypes, comments and xmlns attributes. It's now possible to build XHTML valid pages :). xmlns attributes are always kept but there are options to ignore the doctype and comment (at the request of foom, not sure why yet). Right now, the default is to retain doctypes and comments but you can use the ignoreDocType and ignoreComment args to the xml loaders and flatsax parse functions. This bit may change. * Add a URL -> IResource adapter that performs a HTTP redirect. URLs can then be returned from locateChild(). 2004-06-07 Donovan Preston <dp(a)divmod.org> * Added nevow.canvas, an experimental module similar to LivePage which provides a Python server-side API for drawing arbitrary lines, curves, and text in the browser. The implementation is socket-based and asynchronous, so the server can issue drawing commands to the client at any time. The idea is to provide a server-side API to the Python programmer and shield them from implementation details, but the current implementation uses a pre-compiled Flash movie (which never changes; we are not generating Flash bytecodes). An implementation using SVG or Safari's Canvas (nevow.canvas was written before the Safari Canvas announcement) would be possible. 2004-05-26 Donovan Preston <dp(a)divmod.org> * Add URLOverlay.keep, an API which lets you specify which query args will be carried on from the current page render into the new URL. 2004-05-24 Matt Goodall <matt(a)pollenation.net> * Extracted Fragment from Page. Hopefully, it will make it more obvious that embedding an object with data_ and render_ methods in a stan tree is possible without using something as "heavy" as Page which is really meant to be a web resource. 2004-05-23 Donovan Preston <dp(a)divmod.org> * Added some useful APIs to LiveEvil for manipulating the client-side page: - flt(stan): Flatten some stan, quoting apostrophes as as appropriate for embedding in javascript - set(what, to): Set the contents of the client-side node with the id 'what' to the stan 'to'. - append(where, what): Append the stan 'what' to the client- side node with the id 'where' - alert(what): Show an alert to the user with the text "what" -- Valentino Volonghi aka Dialtone Linux User #310274, Proud Gentoo User Blog: http://vvolonghi.blogspot.com Home Page: http://xoomer.virgilio.it/dialtone/

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ANN: PIL 1.1.5 alpha 5 (september 19, 2004)
by Fredrik Lundh 26 Sep '04

26 Sep '04

The Python Imaging Library (PIL) adds image processing capabilities to your Python interpreter. This library supports many file formats, and provides powerful image processing and graphics capabilities, including display support for Windows and Tkinter. PIL 1.1.5 alpha 5 is now available from effbot.org: http://effbot.org/downloads#imaging (look for Imaging-1.1.5a5.tar.gz) Changes in this release include: + Build improvements: Fixed building under AIX, improved detection of FreeType2 and Mac OS X framework libraries, and more. Many thanks to everyone who helped test the new "setup.py" script! + Added "getcolors()" method. This is similar to the existing histo- gram method, but looks at color values instead of individual layers, and returns an unsorted list of (count, color) tuples. By default, the method returns None if finds more than 256 colors. If you need to look for more colors, you can pass in a limit (this is used to allocate internal tables, so you probably don't want to pass in too large values). + Fixed BILINEAR/BICUBIC/ANTIALIAS filtering for mode "LA". For a list of other changes, see this page: http://effbot.org/zone/pil-changes-115.htm enjoy /F for the pil team at secret labs ab "Secret Labs AB -- makers of fine pythonware since 1997"

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Re: fledgling Python online forum
by russell.cecala＠gmail.com 26 Sep '04

26 Sep '04

It is now at ... http://66.32.178.235/ ... hopefully I will have the domain name issue worked out soon.

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