Mailman 3 February 2005 - Python-announce-list

ANN: Amara XML Toolkit 0.9.4
by Uche Ogbuji Feb. 2, 2005

Feb. 2, 2005

http://uche.ogbuji.net/tech/4Suite/amara ftp://ftp.4suite.org/pub/Amara/ Changes in this release: * Add binderytools.type_inference rule which automatically converts XML nodes to native Python objects such as int, float and datetime * Improve threading and signal behavior of pushdom and pushbind * Add support for attributes() method on nodes. Can now call Ft.Xml.Domlette.PrettyPrint on bindery nodes * Add lazy attributes support by default. amara.binderytools.preserve_attribute_details rule now obsolete XPath always supports attribute access, now * rename prefixes node property to xmlns_prefixes * Update demos and tests * Add CherryPy demo (CherryPy rocks: http://www.cherrypy.org/) * Bug fixes The new binderytools.type_inference is similar to what's popularly called "XML marshalling": TYPE_MIX = """\ <?xml version="1.0" encoding="utf-8"?> <a a1="1"> <b b1="2.1"/> <c c1="2005-01-31"> <d>5</d> <e>2003-01-30T17:48:07.848769Z</e> </c> <g>good</g> </a>""" rules=[binderytools.type_inference()] doc = binderytools.bind_string(TYPE_MIX, rules=rules) doc.a.a1 == 1 #type int doc.a.b.b1 == 2.1 #type float doc.a.c.c1 == datetime.datetime(2005, 1, 31) #type datetime. So wherever it's reasonable to interpret an XML node as one of these simple Python types, this new rule will work them naturally into the data binding. Amara XML Toolkit is a collection of Python tools for XML processing-- not just tools that happen to be written in Python, but tools built from the ground up to use Python idioms and take advantage of the many advantages of Python. Amara builds on 4Suite [http://4Suite.org], but whereas 4Suite focuses more on literal implementation of XML standards in Python, Amara focuses on Pythonic idiom. It provides tools you can trust to conform with XML standards without losing the familiar Python feel. The components of Amara are: * Bindery: data binding tool (a very Pythonic XML API) * Scimitar: implementation of the ISO Schematron schema language for XML; converts Schematron files to Python scripts * domtools: set of tools to augment Python DOMs * saxtools: set of tools to make SAX easier to use in Python * Flextyper: user-defined datatypes in Python for XML processing There's a lot in Amara, but here are highlights: Amara Bindery: XML as easy as py -------------------------------- Based on the retired project Anobind, but updated to use SAX rather than DOM to create bindings. Bindery reads an XML document and returns a data structure of Python objects corresponding to the vocabulary used in the XML document, for maximum clarity. Bindery turns the document <monty> <python spam="eggs">What do you mean "bleh"</python> <python ministry="abuse">But I was looking for argument</python> </monty> Into a set of objects such that you can write binding.monty.python.spam In order to get the value "eggs" or binding.monty.python[1] In order to get the value "But I was looking for argument". There are other such tools for Python, and what makes Anobind unique is that it's driven by a very declarative rules-based system for binding XML to the Python data. You can register rules that are triggered by XPattern expressions specialized binding behavior. It includes XPath support and supports mutation. Bindery is very efficient, using SAX to generate bindings. Scimitar: Schematron for Python -------------------------------- Merged in from a separate project, Scimitar is an implementation of ISO Schematron that compiles a Schematron schema into a Python validator script. You typically use scimitar in two phases. Say you have a schematron schema schema1.stron and you want to validate multiple XML files against it, instance1.xml, instance2.xml, instance3.xml. First you run schema1.stron through the scimitar compiler script, scimitar.py: scimitar.py schema1.stron The generated file, schema1.py, can be used to validate XML instances: python schema1.py instance1.xml Which emits a validation report. Amara DOM Tools: giving DOM a more Pythonic face ------------------------------------------------ DOM came from the Java world, hardly the most Pythonic API possible. Some DOM-like implementations such as 4Suite's Domlettes mix in some Pythonic idiom. Amara DOM Tools goes even further. Amara DOM Tools feature pushdom, similar to xml.dom.pulldom, but easier to use. It also includes Python generator-based tools for DOM processing, and a function to return an XPath location for any DOM node. Amara SAX Tools: SAX without the brain explosion ------------------------------------------------ Tenorsax (amara.saxtools.tenorsax) is a framework for "linerarizing" SAX logic so that it flows more naturally, and needs a lot less state machine wizardry. License ------- Amara is open source, provided under the 4Suite variant of the Apache license. See the file COPYING for details. Installation ------------ Amara requires Python 2.3 or more recent and 4Suite 1.0a4 or more recent. Make sure these are installed, unpack Amara to a convenient location and run python setup.py install -- Uche Ogbuji Fourthought, Inc. http://uche.ogbuji.net http://4Suite.org http://fourthought.com Use CSS to display XML - http://www.ibm.com/developerworks/edu/x-dw-x-xmlcss-i.html Introducing the Amara XML Toolkit - http://www.xml.com/pub/a/2005/01/19/amara.html Be humble, not imperial (in design) - http://www.adtmag.com/article.asp?id=10286 Querying WordNet as XML - http://www.ibm.com/developerworks/xml/library/x-think29.html Manage XML collections with XAPI - http://www-106.ibm.com/developerworks/xml/library/x-xapi.html Default and error handling in XSLT lookup tables - http://www.ibm.com/developerworks/xml/library/x-tiplook.html Packaging XSLT lookup tables as EXSLT functions - http://www.ibm.com/developerworks/xml/library/x-tiplook2.html

1 0

python-dev Summary for 2004-12-16 through 2004-12-31
by Brett C. Feb. 2, 2005

Feb. 2, 2005

This is a summary of traffic on the `python-dev mailing list`_ from December 16, 2004 through December 31, 2004. It is intended to inform the wider Python community of on-going developments on the list. To comment on anything mentioned here, just post to `comp.lang.python`_ (or email python-list(a)python.org which is a gateway to the newsgroup) with a subject line mentioning what you are discussing. All python-dev members are interested in seeing ideas discussed by the community, so don't hesitate to take a stance on something. And if all of this really interests you then get involved and join `python-dev`_! This is the fifty-fifth summary written by Brett Cannon (I have been doing this for too long...). To contact me, please send email to brett at python.org ; I do not have the time to keep up on comp.lang.python and thus do not always catch follow-ups posted there. All summaries are archived at http://www.python.org/dev/summary/ . Please note that this summary is written using reStructuredText_ which can be found at http://docutils.sf.net/rst.html . Any unfamiliar punctuation is probably markup for reST_ (otherwise it is probably regular expression syntax or a typo =); you can safely ignore it, although I suggest learning reST; it's simple and is accepted for `PEP markup`_ and gives some perks for the HTML output. Also, because of the wonders of programs that like to reformat text, I cannot guarantee you will be able to run the text version of this summary through Docutils_ as-is unless it is from the `original text file`_. .. _PEP Markup: http://www.python.org/peps/pep-0012.html The in-development version of the documentation for Python can be found at http://www.python.org/dev/doc/devel/ and should be used when looking up any documentation on new code; otherwise use the current documentation as found at http://docs.python.org/ . PEPs (Python Enhancement Proposals) are located at http://www.python.org/peps/ . To view files in the Python CVS online, go to http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/ . Reported bugs and suggested patches can be found at the SourceForge_ project page. The `Python Software Foundation`_ is the non-profit organization that holds the intellectual property for Python. It also tries to forward the development and use of Python. But the PSF_ cannot do this without donations. You can make a donation at http://python.org/psf/donations.html . Every penny helps so even a small donation (you can donate through PayPal or by check) helps. .. _python-dev: http://www.python.org/dev/ .. _SourceForge: http://sourceforge.net/tracker/?group_id=5470 .. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev .. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python .. _Docutils: http://docutils.sf.net/ .. _reST: .. _reStructuredText: http://docutils.sf.net/rst.html .. _PSF: .. _Python Software Foundation: http://python.org/psf/ .. contents:: .. _last summary: http://www.python.org/dev/summary/2004-12-01_2004-12-15.html .. _original text file: http://www.python.org/dev/summary/2004-12-16_2004-12-31.ht ===================== Summary Announcements ===================== You can still `register <http://www.python.org/pycon/2005/register.html>`__ for `PyCon`_. The `schedule of talks`_ is now online. Jim Hugunin is lined up to be the keynote speaker on the first day with Guido being the keynote on Thursday. Once again PyCon looks like it is going to be great. On a different note, as I am sure you are all aware I am still about a month behind in summaries. School this quarter for me has just turned out hectic. I think it is lack of motivation thanks to having finished my 14 doctoral applications just a little over a week ago (and no, that number is not a typo). I am going to for the first time in my life come up with a very regimented study schedule that will hopefully allow me to fit in weekly Python time so as to allow me to catch up on summaries. And this summary is not short because I wanted to finish it. 2.4 was released just before the time this summary covers so most stuff was on bug fixes discovered after the release. .. _PyCon: http://www.pycon.org/ .. _schedule of talks: http://www.python.org/pycon/2005/schedule.html ======= Summary ======= ------------- PEP movements ------------- I introduced a `proto-PEP <http://mail.python.org/pipermail/python-dev/2005-January/050753.html>`__ to the list on how one can go about changing CPython's bytecode. It will need rewriting once the AST branch is merged into HEAD on CVS. Plus I need to get a PEP number assigned to me. =) Contributing threads: - `proto-pep: How to change Python's bytecode <http://mail.python.org/pipermail/python-dev/2004-December/050542.html>`__ ------------------------------------ Handling versioning within a package ------------------------------------ The suggestion of extending import syntax to support explicit version importation came up. The idea was to have something along the lines of ``import foo version 2, 4`` so that one can have packages that contain different versions and to provide an easy way to specify which version was desired. The idea didn't fly, though. The main objection was that import-as support was all you really needed; ``import foo_2_4 as foo``. And if you had a ton of references to a specific package and didn't want to burden yourself with explicit imports, one can always have a single place before code starts executing doing ``import foo_2_4; sys.modules["foo"] = foo_2_4``. And that itself can even be lower by creating a foo.py file that does the above for you. You can also look at how wxPython handles it at http://wiki.wxpython.org/index.cgi/MultiVersionInstalls . Contributing threads: - `Re: [Pythonmac-SIG] The versioning question... <http://mail.python.org/pipermail/python-dev/2004-December/050551.html>`__ =============== Skipped Threads =============== - Problems compiling Python 2.3.3 on Solaris 10 with gcc 3.4.1 - 2.4 news reaches interesting places see `last summary`_ for coverage of this thread - RE: [Python-checkins] python/dist/src/Modules posixmodule.c, 2.300.8.10, 2.300.8.11 - mmap feature or bug? - Re: [Python-checkins] python/dist/src/Pythonmarshal.c, 1.79, 1.80 - Latex problem when trying to build documentation - Patches: 1 for the price of 10. - Python for Series 60 released - Website documentation - link to descriptor information - Build extensions for windows python 2.4 what are the compiler rules? - Re: [Python-checkins] python/dist/src setup.py, 1.208, 1.209 - Zipfile needs? fake 32-bit unsigned int overflow with ``x = x & 0xFFFFFFFFL`` and signed ints with the additional ``if x & 0x80000000L: x -= 0x100000000L`` . - Re: [Python-checkins] python/dist/src/Mac/OSX fixapplepython23.py, 1.1, 1.2

1 0

ANN: MayaVi-1.4 released
by Prabhu Ramachandran Feb. 2, 2005

Feb. 2, 2005

Hi, This is to announce the availability of the (long overdue) MayaVi Data Visualizer version 1.4. MayaVi is a free, easy to use, scientific data visualizer. It is written in Python, uses the Visualization Toolkit (VTK) for the graphics and provides a GUI written using Tkinter. MayaVi is distributed under a BSD license. It is also cross platform and should run on any platform where both Python and VTK are available. For more information, sources, binaries, screenshots, installation instructions, documentation etc. visit the MayaVi home page at: http://mayavi.sourceforge.net Also bundled with MayaVi is a VTK pipeline browser written in Python and a utility module that makes using VTK easier from the Python interpreter. New in this release: * Support for data files belonging to a time series. It is also possible to sweep through the time series. Thanks to Gerard Gorman for an initial patch! * Support for user defined modules and filters. A search path may be specified in the preferences. User defined modules and filters are searched for in these directories and automatically picked up by MayaVi. Thanks to Fernando Perez for an initial patch! * Fixed critical bugs in the Volume module. Anyone using the Volume module from the 1.3 release should upgrade! * Miscellaneous enhancements: allow the user to disable rendering temporarily, user can specify geometry of the MayaVi window. * Several other bug fixes and minor enhancements. Acknowledgements: Many thanks to SourceForge for their continued support in hosting MayaVi. Thanks also to various users who provided patches, bug reports, support and suggestions. Have fun! prabhu

1 0

ANN: pyx12-1.1.0
by John Holland Feb. 1, 2005

Feb. 1, 2005

What's New: =========== Corrected a number of validation bugs. Added many unit and functional tests. xmlx12 - translate an XML document created with the x12_simple conversion back to an X12 document: x12xml -Xsimple test.txt | xslt test.xsl | xmlx12 > output.txt x12norm - normalize an X12 document. Create/strip end of line characters. Refactor interfaces. What is Pyx12? ============== Pyx12 is a HIPAA X12 document validator and converter. It parses an ANSI X12N data file and validates it against the Implementation Guidelines for a HIPAA transaction. By default, it creates a 997 response. It can create an html representation of the X12 document or can translate to an XML representation of the data file. Where can I get it? =================== Pyx12 is available at http://sourceforge.net/projects/pyx12/

1 0

Dr. Dobb's Python-URL! - weekly Python news and links (Feb 1)
by Cameron Laird Feb. 1, 2005

Feb. 1, 2005

QOTW: "The right solution will end up being unique to Python though. It has to feel like Python." -- Guido van Rossum http://aws.typepad.com/aws/2005/01/amazon_devcon_g_4.html "Sparring with Alex Martelli is like boxing Mike Tyson, except that one experiences brain enhancement rather than brain damage :)." -- beliavsky This is your opportunity to vote on the prospective creation of de.comp.lang.python: http://groups.google.de/groups?selm=erneuter-CfV-1-Einrichtung-de.comp.lang… http://gvv.th-h.de/ eval() often inverts repr(). pickle() makes for more reliable serialization: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/f… Kamilche illustrates how scripting (Web-scraping, in this case) can put eBay (Google, Amazon, ...) under *your* control: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1… Tim Churches pulls off the remarkable feat of appearing to say true, useful, and not-stultifying things on licensing: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a… How declarative are metaclasses and decorators? Diez B. Roggisch has been helpful with this and similarly interesting summaries and examples: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a… Art Siegel also approaches the question, in a more narrative fashion. Notice in the same thread Steve Holden's persistent advertising of PyCon 2005, emphasizing the celebrities (martellibot!, Armin "I Infer That" Rigo, ...) expected to appear, some for the first time ever in this dimension. Nick Coghlan explains the trickiness of Duncan Booth and F. PetitJean. This is a chance to practice generators, zip, map, and iter, all in about two lines: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a… Do you know the standard library well enough to recognize its parametric statistics? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1… ======================================================================== 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 Kurt B. Kaiser publishes a weekly report on faults and patches. http://www.google.com/groups?as_usubject=weekly%20python%20patch 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. deli.cio.us presents an intriguing approach to reference commentary. It already aggregates quite a bit of Python intelligence. http://del.icio.us/tag/python *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.

1 0

Vancouver Python/Zope/Plone: Creating OS X Cocoa Applications Using XML and Python
by Paul Prescod Feb. 1, 2005

Feb. 1, 2005

February 1, 2005 Creating OS X Cocoa Applications Using XML and Python, Dethe Elza This talk will cover the use of Renaissance and Python to develop programs for OS X, focussing on both rapid application development, and ease of maintenance. Renaissance is an XML dialect for describing Cocoa (or GNUstep) user interfaces, which can be used as an alternative to Apple's binary NIB format. It grew out of the GNUstep? project and is intended for use with Objective-C, but works seamlessly from Python with the PyObjC bridge. Hosted by ActiveState ("a division of Sophos") at 580 Granville St., Vancouver

1 0