🌐 Mailman 3 June 2008 - Python-announce-list - python.org

Python-URL! - weekly Python news and links (Jun 24)
by Gabriel Genellina June 24, 2008

June 24, 2008

QOTW: "I find that eloquent Python speakers often tend to write a for loop when mere good ones will try to stick a list comprehension in!" - Arnaud Delobelle http://groups.google.com/group/comp.lang.python/msg/dfc72ea32f1f9c91 The first beta release of Python 3.0 is out (jointly with 2.6b1): http://groups.google.com/group/comp.lang.python/browse_thread/thread/baed11… A case where generating Python source code may be the right answer: http://groups.google.com/group/comp.lang.python/browse_thread/thread/646169… Jump to a specific line number in a text file: http://groups.google.com/group/comp.lang.python/browse_thread/thread/256642… Problem: how to break out of multiple threads when some are waiting for I/O: http://groups.google.com/group/comp.lang.python/browse_thread/thread/59fa6e… Several ways (very different!) to split complex comma-separated expressions: http://groups.google.com/group/comp.lang.python/browse_thread/thread/deba5d… Martin v. L=F6wis explains why it's difficult to compute the size of an object accurately: http://groups.google.com/group/comp.lang.python/browse_thread/thread/28a66f… A proposal for ordered dictionaries: http://groups.google.com/group/comp.lang.python/browse_thread/thread/311037… Launching a Ruby script and getting data back: http://groups.google.com/group/comp.lang.python/browse_thread/thread/5e6dbc… ======================================================================== 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. Just beginning with Python? This page is a great place to start: http://wiki.python.org/moin/BeginnersGuide/Programmers The Python Papers aims to publish "the efforts of Python enthusiats": http://pythonpapers.org/ The Python Magazine is a technical monthly devoted to Python: http://pythonmagazine.com Readers have recommended the "Planet" sites: http://planetpython.org http://planet.python.org 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 Python411 indexes "podcasts ... to help people learn Python ..." Updates appear more-than-weekly: http://www.awaretek.com/python/index.html 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/ 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 Although unmaintained since 2002, the Cetus collection of Python hyperlinks retains a few gems. 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 Many Python conferences around the world are in preparation. Watch this space for links to them. 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://www.python.org/dev/peps/pep-0042/ 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/topic/python/ (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… There is *not* an RSS for "Python-URL!"--at least not yet. Arguments for and against are occasionally entertained. 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!". Write to the same address to unsubscribe. -- The Python-URL! Team-- Phaseit, Inc. (http://phaseit.net) is pleased to participate in and sponsor the "Python-URL!" project. Watch this space for upcoming news about posting archives.

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ANN: Komodo IDE 4.4 & Komodo Edit 4.4 released
by Trent Mick June 24, 2008

June 24, 2008

Komodo IDE 4.4.0 and Komodo Edit 4.4.0 have been released. Installers for Windows, Mac OS X and Linux are available here: http://www.activestate.com/products/komodo_ide/ http://www.activestate.com/products/komodo_edit/ Or, if you have Komodo 4.3 installed, auto-update should provide the update for you automatically sometime today. What's New in Komodo 4.4.0 ========================== * [Komodo IDE] A new "Sections List" filterable menu list has been added to the status bar. This supports all of Komodo's core "codeintel" languages plus it provides a file outline for C/C++, Java, CSS, XML/HTML files and more. * [Komodo IDE] A number of improvements to Source Code Control -- in particular a multi-file commit dialog and a "Change List" tab (next to the Toolbox) that tracks what files you are editing/adding/deleting from SCC while in Komodo to help you commit those files in logic change sets. * Column mode editing. Often requested, finally here. * Plus many many bug fixes and user interface improvements. Get the full details here: http://docs.activestate.com/komodo/4.4/releases/ide.html About Komodo ============ Komodo IDE is a commercial multi-platform integrated development environment for dynamic languages (Python, Ruby, Perl, PHP, JavaScript) and web tech (HTML, CSS, XML, XSLT): full-featured debuggers; code browsing; Subversion, CVS and Perforce integration, regular expression toolkit (Rx); interactive shells; and everything in Komodo Edit. Komodo Edit is the free and *open-source* little brother of Komodo IDE. It is a multi-platform, multi-language editor that kicks ass. Features include: - an excellent editor (based on Scintilla) - autocomplete and calltips for many languages - Vi and Emacs keybindings - background syntax checking - syntax coloring for dozens of languages (including template languages like Django's template language) - schema-based XML autocomplete - full project support - remote files - extensibility via Python or JavaScript macros, or via Firefox-style extensions - multi-language file support (get HTML, CSS and JavaScript autocomplete all in one HTML file!). Let us know what you think here: community: http://community.activestate.com/products/Komodo email: http://listserv.activestate.com/mailman/listinfo/komodo-discuss bugs: http://bugs.activestate.com/enter_bug.cgi?product=Komodo Enjoy, Trent -- Trent Mick trentm at activestate.com

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Sphinx 0.4 released
by Georg Brandl June 23, 2008

June 23, 2008

I'm pleased to announce the next minor version of Sphinx, the Python documentation generation tool. What is it? =========== Sphinx is a tool that makes it easy to create intelligent and beautiful documentation for Python projects (or other documents consisting of multiple reStructuredText source files). Its website is at <http://sphinx.pocoo.org/>. Important changes ================= (full list at http://sphinx.pocoo.org/changes.html) * The new config value `default_role` can be used to select the default role for all documents. * Sphinx now interprets field lists with fields like ``:param foo:`` in description units. * The new `staticmethod` directive can be used to mark methods as static methods. * The new TextBuilder creates plain-text output. * Autodoc Extension: - The autodoc extension now offers a much more flexible way to manipulate docstrings before including them into the output, via the new `autodoc-process-docstring` event. - The `autodoc` extension accepts signatures for functions, methods and classes now that override the signature got via introspection from Python code. - The `autodoc` extension now offers a ``show-inheritance`` option for autoclass that inserts a list of bases after the signature. - The autodoc directives now support the ``noindex`` flag option. * HTML output: - The "previous" and "next" links have a more logical structure, so that by following "next" links you can traverse the entire TOC tree. - The new event `html-page-context` can be used to include custom values into the context used when rendering an HTML template. - The new config value `html_favicon` can be used to set a favicon for the HTML output. Thanks to Sebastian Wiesner. - The new config value `html_split_index` can be used to create separate index pages for each letter, to be used when the complete index is too large for one page. - The module index now isn't collapsed if the number of submodules is larger than the number of toplevel modules. * The image directive now supports specifying the extension as ``.*``, which makes the builder select the one that matches best. Thanks to Sebastian Wiesner. * The new config value `exclude_trees` can be used to exclude whole subtrees from the search for source files. * Python 3-style signatures, giving a return annotation via ``->``, are now supported. Enjoy! Georg

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anntools 0.5.1 - Tools for function annotation
by Ferenczi Viktor June 23, 2008

June 23, 2008

I'm pleased to announce the first alpha version of anntools, a utility package for Python 3.0's new function annotation feature. It supports validation, type checking and conversion. It provides cooperation schemes to achieve future compatibility with another annotation based tools. The anntools package is also usable with Python 2.4 and 2.5, since all functionality is also supported through keyword arguments passed to decorators. Download, examples and documentation: http://code.google.com/p/anntools/ NOTE: It is currently alpha quality software, please do not use it for production use yet. You can add bug reports to the issue tracker.

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ANN: gmpy v1.03 is released
by casevh June 23, 2008

June 23, 2008

Hi everyone, I'm happy to announce that GMPY v1.03 has been released. It is available at: http://code.google.com/p/gmpy/ What is GMPY? ================== GMPY is a C-coded Python extension module that wraps the GMP library to provide to Python code fast multiprecision arithmetic (integer, rational, and float), random number generation, advanced number-theoretical functions, and more. What is new? ================== * Two significant bugs on 64-bit platforms have been fixed. * Improved support for building on Mac OSX. * Instructions for building on Windows are now included. * Binary installers are provided for Windows, including Python 2.6. * In addition, abinary installer using a version of GMP specifically optimized for Core2 processors is provided for Python 2.6. Enjoy, Case Van Horsen

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[ANN] Virtual Worlds Open Grid Protocol testing library in Python (pyogp)
by Lawson English June 20, 2008

June 20, 2008

A new open source project has been started by Linden Lab, makers of the Second Life™ virtual worlds, and the Second Life Architecture Working Group (AWG) to test LL's proposed virtual worlds Open Grid Protocol (OGP) that will allow any virtual world to support multi-world login, between-world teleport and other transportation mechanisms, as well as asset/property and currency sharing between worlds. https://wiki.secondlife.com/w/index.php?title=AWG_Test_Harness The code is released to all comers in Python under an Apache v2 agreement, although contributions require the signing of Linden Lab's developer contribution agreement (giving LL equal copyrights to the original contributer--a boilerplate LL corporate requirement that likely is redundant given the nature of Apache v2). svn: http://svn.secondlife.com/trac/linden/browser/projects/2008/pyogp. Second Life contribution agreement: http://secondlifegrid.net.s3.amazonaws.com/docs/SLVcontribution_agmt.pdf irc: irc://irc.freenode.net/#pyogp AWG homepage: https://wiki.secondlife.com/wiki/AWG AWG discussion group homepage: https://wiki.secondlife.com/wiki/Category:AW_Groupies AWG-related pages, irc channels and forums: https://wiki.secondlife.com/wiki/Category:AW_Groupies#External_Resources The near-term AWG goal is to create a set of open standard protocols that: 1) Enable third parties to run servers that connect to the Second Life Grid platform 2) Scale the Second Life Grid architecture to support the industry-projected situation in the next 10 years, where virtual worlds will comprise at least 60 million regions, 2 billion users and in-world concurrency of 50-100 million residents. https://wiki.secondlife.com/wiki/SLGOGP_Draft_1 https://wiki.secondlife.com/wiki/SLGOGP_Teleport_Strawman The long-term goal is to design a set of protocols and standards that will enable almost any virtual world of any kind to "plug into" this system to varying degrees, from support for a "universal avatar" to full support for all Second Life features and/or the ability to inform universal 3D viewers what features are supported (or not) in any given virtual world. More info on pyogp and the AWG can be obtained on the website or via irc. Lawson English AKA Saijana Kuhn, AWGroupies admin

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lxml 2.1 beta3 released
by Stefan Behnel June 20, 2008

June 20, 2008

Hi all, I'm proud to release lxml 2.1beta3 to PyPI. This is the first lxml release that builds and works on Python 2.3, 2.4, 2.5, 2.6 (beta) and 3.0 (beta). http://codespeak.net/lxml/dev/ http://pypi.python.org/pypi/lxml/2.1beta3 Install with easy_install lxml==2.1beta3 What is lxml? """ In short: lxml is the most feature-rich and easy-to-use library for working with XML and HTML in the Python language. lxml is a Pythonic binding for the libxml2 and libxslt libraries. It is unique in that it combines the speed and feature completeness of these libraries with the simplicity of a native Python API. """ Unusual for a beta release, the third beta contains more new features than bug fixes, which is largely (but not only) due to adaptations with respect to Python 3. The changelog follows below. I expect this to be the last beta release before 2.1 final. Feedback is very much appreciated, especially on the "experimental" features like the namespace cleanup function and on Python 2.6/3.0 support. Your feedback will help in making the final release the best lxml ever. Have fun, Stefan 2.1beta3 (2008-06-19) Features added * Major overhaul of tools/xpathgrep.py script. * Pickling ElementTree objects in lxml.objectify. * Support for parsing from file-like objects that return unicode strings. * New function etree.cleanup_namespaces(el) that removes unused namespace declarations from a (sub)tree (experimental). * XSLT results support the buffer protocol in Python 3. * Polymorphic functions in lxml.html that accept either a tree or a parsable string will return either a UTF-8 encoded byte string, a unicode string or a tree, based on the type of the input. Previously, the result was always a byte string or a tree. * Support for Python 2.6 and 3.0 beta. * File name handling now uses a heuristic to convert between byte strings (usually filenames) and unicode strings (usually URLs). * Parsing from a plain file object frees the GIL under Python 2.x. * Running iterparse() on a plain file (or filename) frees the GIL on reading under Python 2.x. * Conversion functions html_to_xhtml() and xhtml_to_html() in lxml.html (experimental). * Most features in lxml.html work for XHTML namespaced tag names (experimental). Bugs fixed * ElementTree.parse() didn't handle target parser result. * Crash in Element class lookup classes when the __init__() method of the super class is not called from Python subclasses. * A number of problems related to unicode/byte string conversion of filenames and error messages were fixed. * Building on MacOS-X now passes the "flat_namespace" option to the C compiler, which reportedly prevents build quirks and crashes on this platform. * Windows build was broken. * Rare crash when serialising to a file object with certain encodings. Other changes * Non-ASCII characters in attribute values are no longer escaped on serialisation. * Passing non-ASCII byte strings or invalid unicode strings as .tag, namespaces, etc. will result in a ValueError instead of an AssertionError (just like the tag well-formedness check). * Up to several times faster attribute access (i.e. tree traversal) in lxml.objectify.

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lockfile 0.3
by skip＠pobox.com June 20, 2008

June 20, 2008

Lockfile 0.3 is now available from PyPI: http://pypi.python.org/pypi/lockfile This version fixed a problem in the 2.4 adapter file and expands the documentation slightly. Functionally it is unchanged from 0.2. What is lockfile? The lockfile module exports a FileLock class that provides a simple API for locking files. Unlike the Windows msvcrt.locking function, the Unix fcntl.flock and fcntl.lockf functions and the deprecated posixfile module, the API is identical across both Unix (including Linux and Mac) and Windows platforms. The lock mechanism relies on the atomic nature of the link (on Unix) and mkdir (On Windows) system calls. -- Skip Montanaro - skip(a)pobox.com - http://www.webfast.com/~skip/ "Be different, express yourself like everyone else."

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EuroSciPy - Early Registration ends June 20th
by Mike Müller June 19, 2008

June 19, 2008

Greetings, This is a friendly reminder that the Early Registration deadline for the EuroSciPy Conference is June 20th. Conference Date and Venue ------------------------- The EuroSciPy Conference will be held July 26-27, 2008 in Leipzig, Germany. http://scipy.org/EuroSciPy2008 Registration ------------ The direct link to the registration site is here: http://www.python-academy.com/euroscipy/index.html The registration fee is 100.00€ for early registrants and will increase to 150.00€ for late registration (after June 20). Program ------- The schedule of talks is available at: http://scipy.org/EuroSciPy2008#schedule Keynote ------- The keynote speaker this year will be Travis Oliphant, the primary author of the recent NumPy rewrite. Pre-Conference Courses ---------------------- If you like to extend your trip to Leipzig, you can attend pre-conference courses: 1.) 2-day course "Introductory to Python for Programmers" followed by a 2.) 3-day course "Python for Scientists and Engineers" http://scipy.org/EuroSciPy2008#courses About EuroSciPy --------------- EuroSciPy is designed to complement the popular SciPy Conferences which have been held for the last 7 years at Caltech (the 2008 SciPy Conference in the U.S. will be held the week of August 19-24). Similarly, the EuroSciPy Conference provides a unique opportunity to learn and affect what is happening in the realm of scientific computing with Python. Attendees will have the opportunity to review the available tools and how they apply to specific problems. By providing a forum for developers to share their Python expertise with the wider commercial, academic, and research communities, this conference fosters collaboration and facilitates the sharing of software components, techniques and a vision for high level language use in scientific computing. Typical presentations include general python use in the sciences, as well as NumPy and SciPy usage for general problem solving. Beyond the excellent talks, there are inter- session discussions that prove stimulating and helpful. Registration will include breakfast, snacks and lunch for Saturday and Sunday. For those doing scientific computing using Python, this is a conference you'll not want to miss. Please pass this announcement along to any other relevant contacts. Many Thanks, Mike Müller

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Pydev 1.3.18 Released
by Fabio Zadrozny June 19, 2008

June 19, 2008

Hi All, Pydev and Pydev Extensions 1.3.18 have been released Details on Pydev Extensions: http://www.fabioz.com/pydev Details on Pydev: http://pydev.sf.net Details on its development: http://pydev.blogspot.com Release Highlights in Pydev Extensions: ----------------------------------------------------------------- * Auto-import: Groups imports when possible. * Auto-import: Doesn't bring imports for completions already in the document even if a parse is not successful. * Organize Imports (ctrl+shift+O): Suggests imports to the undefined tokens in the editor. * Import quick-fix: Icons correspondent to the element being imported. Release Highlights in Pydev: ---------------------------------------------- * Executing external programs: Using Runtime.exec(String[] cmdargs) instead of a string with the generated command (fixes problems regarding having spaces in the installation). * Organize Imports (ctrl+shift+O): Imports can be grouped. * Cygwin: sys.executable in cygwin was not returning '.exe' in the end of the executable as it should. * Additional paths for PYTHONPATH (Patch from Eric Wittmann): extension point allows plugins to contribute paths to the PYTHONPATH. * Code-completion: typing '.' won't apply the selected completion, but will still request a new one with the current contents. * Pydev Package Explorer: Problem while trying to show active editor on the pydev package explorer. What is PyDev? --------------------------- PyDev is a plugin that enables users to use Eclipse for Python and Jython development -- making Eclipse a first class Python IDE -- It comes with many goodies such as code completion, syntax highlighting, syntax analysis, refactor, debug and many others. Cheers, -- Fabio Zadrozny ------------------------------------------------------ Software Developer ESSS - Engineering Simulation and Scientific Software http://www.esss.com.br Pydev Extensions http://www.fabioz.com/pydev Pydev - Python Development Enviroment for Eclipse http://pydev.sf.net http://pydev.blogspot.com

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