Mailman 3 April 2005 - Python-announce-list

Frog 1.4 (web log aka blogging server)
by Irmen de Jong April 22, 2005

April 22, 2005

I've released a new version of Frog, a web log aka blogging server written in 100% python. Get version 1.4 from http://snakelets.sourceforge.net/frog/index.html (note: storage file format has been changed since v1.3) Some of the more interesting features are: - multi user - no database needed (uses files for storage) - no web server needed (it runs in Snakelets, which has its own web server) - splitted articles ("read more...") - email notification when comment is added - formatting similar to 'bbcode', supports images and other files - anti-spam measures: puzzles, auto-updating link blacklist, anti-indexing hyperlinks in comments (rel="nofollow") - outputs lean xhtml+css pages - fully unicode compatible - web-based file manager, available as separate module Have fun :) --Irmen PS You can see Frog in action here: http://www.razorvine.net/snake/frog/user/irmen/

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Open Source Training Course Dates Database
by Mark Pratt April 22, 2005

April 22, 2005

Hi, opensourcexperts.com now features a Database for finding Open Source related course dates. Here are some views for those interested in Python, Zope, Plone related training. Here is the current listing of all Python Training Course dates in 2005: http://www.opensourcexperts.com/Training/list.html? Filter_CatID=7&Filter_month=0 Here is the current listing of all Zope Training Course dates in 2005: http://www.opensourcexperts.com/Training/list.html? Filter_CatID=1&Filter_month=0 Here is the current listing of all Plone Training Course dates in 2005: http://www.opensourcexperts.com/Training/list.html? Filter_CatID=2&Filter_month=0 Are you doing Open Source related training in 2005? Please list course dates in the database. It's free. Cheers, Mark

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ANN: Urwid 0.8.7
by Ian Ward April 22, 2005

April 22, 2005

Announcing Urwid 0.8.7 ---------------------- Urwid home page: http://excess.org/urwid/ Tarball: http://excess.org/urwid/urwid-0.8.7.tar.gz or: https://excess.org/urwid/urwid-0.8.7.tar.gz Summary: ======== This release adds a number of new widget classes as well as feature enhancements for existing widget classes. It also comes with a new example program similar to the dialog(1) command. New in this release: ==================== - New widget classes: Button, RadioButton, CheckBox. - New layout widget classes: Padding, GridFlow. - New dialog.py example program that behaves like dialog(1) command. - Pile widgets now support selectable items, focus changing with up and down keys and setting the cursor position. - Frame widgets now support selectable items in the header and footer. - Columns widgets now support fixed width and relative width columns, a minimum width for all columns, selectable items within columns containing flow widgets (already supported for box widgets), focus changing with left and right keys and setting the cursor position. - Filler widgets may now wrap box widgets and have more alignment options. - Updated tour.py example program to show new widget types and features. - Avoid hogging cpu on gradual window resize and fix for slow resize with cygwin's broken curses implementation. - Fixed minor CJK problem and curs_set crash under MacOSX and Cygwin. - Fixed crash when deleting cells in calc.py example program. About Urwid =========== Urwid is a curses-based UI library for Python. It features fluid interface resizing, CJK support, multiple text layouts, simple attribute markup, powerful scrolling list boxes, flexible edit boxes and HTML screen shots.

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ANN: Vampire 1.6, an extension module for mod_python.
by grahamd＠dscpl.com.au April 22, 2005

April 22, 2005

Vampire 1.6 is now available. http://www.dscpl.com.au/projects/vampire http://www.dscpl.com.au/downloads/vampire-1.6-20050422.tar.gz Vampire is an extension module for mod_python, which provides a more flexible dispatch mechanism for basic content handlers, as well as an alternative implementation of the mod_python.publisher module. A range of other useful features are also provided which make using mod_python a much more pleasant experience. For a quick overview of the features that Vampire provides check out: http://www.dscpl.com.au/projects/vampire/articles/vampire-001.html For a full list of changes in this new version check out: http://www.dscpl.com.au/projects/vampire/changes.html A couple of bugs have been fixed in this version, along with some new features and improvements. The supplied example of how to use mod_python/Vampire with Cheetah templates has also been improved. Problems fixed include a bug in the module import mechanism which was causing thread lockups when import modules were doing sub imports and the system was heavily loaded with requests against the same resource. Plus changes to allow Digest or other forms of authentication to be carried out by Apache and not have Vampire get in the way by throwing back a bad request error due to not knowing anything about that specific authentication type. Most significant new feature is a way of overriding login authentication and access hooks so that an alternate mechanism to Basic authentication can be used. This allows for example a session based mechanism using a web form for login to be easily used. Enjoy.

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[ANN] pysqlite 2.0.alpha3
by Gerhard Haering April 21, 2005

April 21, 2005

=================== pysqlite 2.0.alpha3 =================== I'm glad to announce pysqlite 2.0.alpha3, which will be the last alpha release. Documentation and more testing will be what I'm concentrating on in the beta test phase, so here's the explanation of the new features within the change log. Download it from Sourceforge: http://sourceforge.net/project/showfiles.php?group_id=54058 Changes since 2.0.alpha2 ======================== - Fixed various memory leaks and refcount problems. - Connection, Cursor and row factories. o Connection factory: Subclass pysqlite2.dbapi2.Connection and provide the parameter to pysqlite2.dbapi2.connect to use that class instead. o Cursor factory: Subclass pysqlite2.dbapi2.Cursor and provide the parameter to the cursor() method of the Connection class so that cursors of your class are created. o Row factory: set the row_factory attribute in your cursor to a callable that accepts a tuple and returns the "real" row object. Combine the three for maximimal power and convenience like in the following example, where we transparently use the db_row module from http://opensource.theopalgroup.com/ to be able to access columns by name instead of by index. A fast alternative to PgResultSet in pysqlite 1.x. from pysqlite2 import dbapi2 as sqlite import db_row class DbRowConnection(sqlite.Connection): def __init__(self, *args, **kwargs): sqlite.Connection.__init__(self, *args, **kwargs) def cursor(self): return DbRowCursor(self) class DbRowCursor(sqlite.Cursor): def execute(self, *args, **kwargs): sqlite.Cursor.execute(self, *args, **kwargs) if self.description: self.row_factory = db_row.IMetaRow(self.description) con = sqlite.connect(":memory:") #, factory=DbRowConnection) cur = con.cursor(factory=DbRowCursor) cur.execute("create table test(i integer)") cur.execute("select 4+5 as foo") for row in cur: print ">", row print row["foo"] print cur.fetchone()["foo"] - The first parameter to .execute() and .executemany() can now also be a Unicode string: cur.execute(u"insert into person(name) values ('Häring')") - The conversion in SQLite types mode for TEXT is now unicode, not UTF-8 encoded bytestrings. i. e. if the column type is TEXT, then you get back unicode objects now. - Implemented user functions and aggregates. Where a number of parameters is expected, -1 means variable number of arguments. The functions and aggregates must return values of the type NoneType, int, float, str, unicode or buffer (BLOB). Example code: def f(*args): return sum(args) class Sum: def __init__(self): self.sum = 0 def step(self, x): self.sum += int(x) def finalize(self): return self.sum con = sqlite.connect(":memory:") # Syntax: function name, number of parameters, callable con.create_function("myfunc", -1, f) # Syntax: aggregate name, number of parameters, aggregate class con.create_aggregate("myaggr", 1, Sum) - Added MANIFEST.in file, so that bdist_rpm and sdist will work. - Release GIL during SQLite calls. - After a cursor.executemany, cursor.rowcount now delivers the sum of all changes, not only the changes in the last call to the prepared statement. - Implemented checks that the SQLite objects are used from the same thread they were created in. Otherwise raise a ProgrammingError. If you're 100% sure that you want to use the same connection object in multiple threads, because you use proper locking, you can turn the check of by using the parameter ''check_same_thread=0''. - Allow for parameters to be dictionaries, too. Then, the name-based binding in SQLite 3 is used: cur.execute("select name from test where name=:name", {"name": "foo"}) - Improved error handling. - Allow for explicit transaction start: >>> con = sqlite.connect(":memory:", no_implicit_begin=True) ... >>> con.begin() ... >>> con.rollback() ... >>> con.commit() - Implemented cursor.lastrowid - Avoid code duplication: handle execute() and executemany() internally in the same function.

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ANN: numarray-1.3.1
by Todd Miller April 21, 2005

April 21, 2005

Release Notes for numarray-1.3.1 Numarray is an array processing package designed to efficiently manipulate large multi-dimensional arrays. Numarray is modelled after Numeric and features c-code generated from python template scripts, the capacity to operate directly on arrays in files, arrays of heterogeneous records, string arrays, and in-place operation on memory mapped files. I. ENHANCEMENTS None. 1.3.1 fixes the problem with gcc-3.4.3 II. BUGS FIXED / CLOSED 1152323 /usr/include/fenv.h:96: error: conflicting types for 'fegete 1185024 numarray-1.2.3 fails to compile with gcc-3.4.3 1187162 Numarray 1.3.0 installation failure See http://sourceforge.net/tracker/?atid=450446&group_id=1369&func=browse for more details.

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ANN: Amara XML Toolkit 1.0b2
by Uche Ogbuji April 20, 2005

April 20, 2005

http://uche.ogbuji.net/tech/4Suite/amara ftp://ftp.4suite.org/pub/Amara/ Changes in this release: * More mutation API improvements (del and assignment can now be used with elements as well as attributes) [1][2][3] * Slight improvements in 4Suite XSLT compatability (still some remaining issues) * Bug fixes [1] http://copia.ogbuji.net/blog/2005-04-17/Amara_gets [2] http://copia.ogbuji.net/blog/2005-04-18/Elements_v [3] http://copia.ogbuji.net/blog/2005-04-18/Deletion_a 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 -------------------------------- Bindery turns an XML document into a tree of Python objects corresponding to the vocabulary used in the XML document, for maximum clarity. For example, the document <monty> <python spam="eggs">What do you mean "bleh"</python> <python ministry="abuse">But I was looking for argument</python> </monty> Becomes a data structure 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 Pytthon -------------------------------- 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://fourthought.com http://copia.ogbuji.net http://4Suite.org Use CSS to display XML, part 2 - http://www-128.ibm.com/developerworks/edu/x-dw-x-xmlcss2-i.html Writing and Reading XML with XIST - http://www.xml.com/pub/a/2005/03/16/py-xml.html Use XSLT to prepare XML for import into OpenOffice Calc - http://www.ibm.com/developerworks/xml/library/x-oocalc/ Schema standardization for top-down semantic transparency - http://www-128.ibm.com/developerworks/xml/library/x-think31.html

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PyFit 0.7a1
by John Roth April 18, 2005

April 18, 2005

I'm pleased to announce that PyFit 0.7a1 is now available in the file sections of the Extreme Programming and FitNesse Yahoo groups. This version implements most of the Fit Library, and changes needed to bring the package into conformance with the Fit 1.1 specification. It also brings it to the level of FitNesse 20050405, plus additional features. John Roth April 18, 2005

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Dr. Dobb's Python-URL! - weekly Python news and links (Apr 18)
by Simon Brunning April 18, 2005

April 18, 2005

QOTW: "Darn. I finally say something that gets into Quote of the Week, and it's attributed to someone else!" -- Greg Ewing (we think) http://groups-beta.google.com/group/comp.lang.python/msg/15b836a557afccb2 "If there were something wrong with the API, Guido would have long since fired up the time machine and changed the timeline so that all would be as right as rain." - Raymond Hettinger "Get real. I can't imagine using anything so complex." -- Scott David Daniels, in response to a suggestion to try (1j-1) as a counting base Continuations for Curmudgeons: http://www.intertwingly.net/blog/2005/04/13/Continuations-for-Curmudgeons Textual watermarks with Python Imaging Library: http://www.livejournal.com/users/gniemeyer/10279.html The new Python Cookbook is out of date already: http://42.blogs.warnock.me.uk/2005/04/oreillycom_onli.html Thunks for nothing: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b… http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6… A tutorial for building a simple to-do list application using WSGIKit, SQLObject, and Zope Page Templates: http://wsgikit.org/docs/TodoTutorial.html What can WSGIKit do for you? http://blog.ianbicking.org/what-can-wsgikit-do-for-you.html The Participatory Culture Foundation's desktop video player - video over BitTorrent: http://www.participatoryculture.org/ Next-generation distributed version control: http://www.bazaar-ng.org/ Will LAMP eclipse Java? http://news.com.com/2061-10795_3-5663085.html Does the fact that Python 2.4 is built using VC++ on Windows give us a problem? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b… Look up IP addresses by country: http://www.livejournal.com/users/zestyping/111325.html Python 2.3.2 for PalmOS: 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. For far, FAR more Python reading than any one mind should absorb, much of it quite interesting, several pages index much of the universe of Pybloggers. http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog http://www.planetpython.org/ http://mechanicalcat.net/pyblagg.html 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. del.icio.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/ (requires subscription) http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&s… 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: Shakya PyGTK Framework/IDE 0.1.8 released
by Eric Jardim April 18, 2005

April 18, 2005

Shakya is a Free Software (GPL) framework for easy and quickly building powerfull applications with Python and PyGTK. Besides, there is also an IDE, made with this same framework, thus users can graphically desing Shakya/PyGTK applications

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