Python-announce-list December 2009

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Python-URL! - weekly Python news and links (Dec 26)
by Gabriel Genellina 26 Dec '09

26 Dec '09

QOTW: "It took Python to make me realize that programming *could* be fun, or at least not annoying enough to keep me from making a career of programming." - Aahz http://groups.google.com/group/comp.lang.python/msg/65ad4e71c194d97e How to compare dialects of csv module? http://groups.google.com/group/comp.lang.python/t/9de18eeabd38faff/ Retrieve the source lines of a function: http://groups.google.com/group/comp.lang.python/t/a389138fbd7a5c58/ How do classes actually work? A beginner's introduction by Steve Holden http://groups.google.com/group/comp.lang.python/t/e5347d4cebc71643/ Packages, and importing names in __init__.py explained: http://groups.google.com/group/comp.lang.python/t/e90896c5b607904a/ How C++ iterators differ from Python iterators, slices and indexes: http://groups.google.com/group/comp.lang.python/t/22d674ee0510cd97/ Generating random numbers in parallel isn't easy: http://groups.google.com/group/comp.lang.python/t/e01e0e4c7073a1e3/ An OS independent way to check if a python app is running: http://groups.google.com/group/comp.lang.python/t/6e00a4ac52863bcc/ pyZui - a Zooming User Interface: http://groups.google.com/group/comp.lang.python/t/c158e4ab710de96/ The way the re module handles backslashes in replacement strings does not seem natural to many: http://groups.google.com/group/comp.lang.python/t/61fdda4299b6a7b4/ Comparing performance: list comprehension vs. map vs. for loop http://groups.google.com/group/comp.lang.python/t/791b2a041acedbc0/ ======================================================================== 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 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 enthusiasts": http://pythonpapers.org/ The Python Magazine is a technical monthly devoted to Python: http://pythonmagazine.com Readers have recommended the "Planet" site: http://planet.python.org comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/group/comp.lang.python.announce/topics 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/ 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/donations/ The Summary of Python Tracker Issues is an automatically generated report summarizing new bugs, closed ones, and patch submissions. http://search.gmane.org/?author=status%40bugs.python.org&group=gmane.comp.p… 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://code.activestate.com/recipes/langs/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, see: http://www.python.org/channews.rdf 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/ 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 Enjoy the *Python Magazine*. http://pymag.phparch.com/ *Py: the Journal of the Python Language* http://www.pyzine.com Dr.Dobb's Portal is another source of Python news and articles: http://www.ddj.com/TechSearch/searchResults.jhtml?queryText=python and Python articles regularly appear at IBM DeveloperWorks: http://www.ibm.com/developerworks/search/searchResults.jsp?searchSite=dW&se… Previous - (U)se the (R)esource, (L)uke! - messages are listed here: http://search.gmane.org/?query=python+URL+weekly+news+links&group=gmane.com… http://groups.google.com/groups/search?q=Python-URL!+group%3Acomp.lang.pyth… http://lwn.net/Search/DoSearch?words=python-url&ctype3=yes&cat_25=yes 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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[ANNOUNCE] PyGTK 2.17.0 - unstable
by Gian Mario Tagliaretti 26 Dec '09

26 Dec '09

A new unstable development release of the Python bindings for GTK+ has been released. The new release is available from ftp.gnome.org and its mirrors as soon as its synced correctly: http://ftp.gnome.org/pub/GNOME/sources/pygtk/2.17/ Blurb: GTK+ is a toolkit for developing graphical applications that run on systems such as Linux, Windows and MacOS X. It provides a comprehensive set of GUI widgets, can display Unicode bidi text. It links into the Gnome Accessibility Framework through the ATK library. PyGTK provides a convenient wrapper for the GTK+ library for use in Python programs, and takes care of many of the boring details such as managing memory and type casting. When combined with PyORBit and gnome-python, it can be used to write full featured Gnome applications. Like the GTK+ library itself PyGTK is licensed under the GNU LGPL, so is suitable for use in both free software and proprietary applications. It is already in use in many applications ranging from small single purpose scripts up to large full features applications. What's new since 2.16.0? - Some docs improvements (Gian Mario) - Wrap new API added in GTK/GDK 2.18 (Gian Mario) - Release GIL in several gdk.Pixbuf methods (Paul, #591726) - Fix override for gtk.TreeSortable.do_get_sorted_column_id (Paul) - Make it possible to implement gtk.TreeSortable to some extent (Paul) - Fix wrong gtk.gdk.color_from_hsv definition (Arun Raghavan, #594347) - Plug memory leaks in a few Pango Cairo functions (Paul, #599730) - Plug a huge leak in gtk.Widget.get_snapshot() (Benjamin Berg, #596612) - Undeprecate gtk.Toolbar.(un)set_icon_size() again (Paul) Bug reports, as always, should go to Bugzilla; check out http://pygtk.org/developer.html and http://pygtk.org/feedback.html for links to posting and querying bug reports for PyGTK. cheers -- Gian Mario Tagliaretti GNOME Foundation member gianmt(a)gnome.org

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Re: SHPAML v0.1 -- HAML-like language for Python
by Steve Howell 24 Dec '09

24 Dec '09

Just to follow up on the announcement below, SHPAML is a mini language that can help you build web pages more quickly. It runs under Python versions 2.4, 2.5, 2.6, and 3.1. Since the original announcement, I have written a tutorial that allows you try out your own SHPAML examples online: http://shpaml.webfactional.com/tutorial/1 I have also fixed some minor bugs, removed some unneeded features, and cleaned up the download process. As this is a new project, feedback is especially welcome. You can follow this link to find the mailing list: http://shpaml.webfactional.com/discuss Cheers, Steve Howell On Dec 11, 5:10 am, Steve Howell <showel...(a)yahoo.com> wrote: > SHPAML is a HAML-like language for Python. If you are not familiar with HAML, it is a markup language implemented in Ruby that allows you to create web pages with an indentation-based syntax. SHPAML is not an exact port of HAML, but it shares the same big goal of slimming your markup, and it is written in Python! It is a simple, lightweight preprocessor and intended to be used in many authoring schemes, whether you are producing HTML directly or integrating with a templating system. > > More details can be found here: > > http://shpaml.webfactional.com/ > > It is an early version, but it has been well tested in practice already and is feature-complete for its fairly minimal goals as of now. The site has a link to a mailing list (Google Groups) for further discussion, if this interests you! > > Thanks, > > Steve Howell

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execnet-1.0.2: channel-over-channels / bug fixes
by holger krekel 23 Dec '09

23 Dec '09

execnet is a small stable pure-python library for working with local or remote clusters of Python interpreters, with ease. It allows to make use of multiple CPUs, connects to remote places via ssh and sockets and requires no prior installation on remote places. The 1.0.2 release is fully backward compatible and: - introduces a generalized way to send channels over channels - makes gateways more resilient against callback failures - speeds up local gateway creation, now at <50ms on an old 1.5GHZ machine - fixes a bug in channel.receive() which could wrongly timeout More info, new tested examples and links to blog entries here: http://codespeak.net/execnet cheers and i wish you all some relaxed last days of this decade, holger changes in 1.0.2 -------------------------------- - generalize channel-over-channel sending: you can now have channels anywhere in a data structure (i.e. as an item of a container type). Add according examples. - automatically close a channel when a remote callback raises an exception, makes communication more robust because until now failing callbacks rendered the receiverthread unuseable leaving the remote side in-accessible. - internally split socket gateways, speeds up popen-gateways by 10% (now at <50 milliseconds per-gateway on a 1.5 GHZ machine) - fix bug in channel.receive() that would wrongly raise a TimeoutError after 1000 seconds (thanks Ronny Pfannschmidt)

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GZRBOT 0.1 released
by Bart Thate 23 Dec '09

23 Dec '09

Hi world ! First of all happy christmas and a happy new year to all of you. I want to release GZRBOT to the world. This is a rename of the CMNDBOT bot, since this name matches the one of GOZERBOT the best and thats what this bot is best described .. GOZERBOT on the Google Application Engine. So this is really CMNDBOT 0.1 after BETA1 and BETA2, but then renamed to GZRBOT. Most of all GZRBOT is there for its code and reuse of it is highly recommended. I made a script which makes it easy to clone gozerbot and rename it so you can run your own bot off the GZRBOT code. GZRBOT has a plugin system that lets you program your own plugin and provide you a way to add custom functionality to your bot. Both writing commands and reacting on events through callbacks is supported. A live web demo of GZRBOT can be seen at http://gzrbot.appspot.com. For wave or jabber (gtalk or any other jabber client) add gzrbot(a)appspot.com to your contactlist or join me on this wave: GZRBOT 0.1 released Source code and documentation (still needs to be written) is available at http://gzrbot.googlecode.com If you have any question about GZRBOT you can reach me at bthate(a)gmail.com Have fun with it ! ;] Bart

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ANN: PyTables 2.2b2 released
by Francesc Alted 22 Dec '09

22 Dec '09

=========================== Announcing PyTables 2.2b2 =========================== PyTables is a library for managing hierarchical datasets and designed to efficiently cope with extremely large amounts of data with support for full 64-bit file addressing. PyTables runs on top of the HDF5 library and NumPy package for achieving maximum throughput and convenient use. This is the second beta version of 2.2 release. The main addition is the support for links. All HDF5 kind of links are supported: hard, soft and external. Hard and soft links are similar to hard and symbolic links in regular UNIX filesystems, while external links are more like mounting external filesystems (in this case, HDF5 files) on top of existing ones. This allows for a considerable degree of flexibility when defining your object tree. See the new tutorial at: http://www.pytables.org/docs/manual-2.2b2/ch03.html#LinksTutorial Also, some other new features (like complete control of HDF5 chunk cache parameters and native compound types in attributes), bug fixes and a couple of (small) API changes happened. In case you want to know more in detail what has changed in this version, have a look at: http://www.pytables.org/moin/ReleaseNotes/Release_2.2b2 You can download a source package with generated PDF and HTML docs, as well as binaries for Windows, from: http://www.pytables.org/download/preliminary For an on-line version of the manual, visit: http://www.pytables.org/docs/manual-2.2b2 Resources ========= About PyTables: http://www.pytables.org About the HDF5 library: http://hdfgroup.org/HDF5/ About NumPy: http://numpy.scipy.org/ Acknowledgments =============== Thanks to many users who provided feature improvements, patches, bug reports, support and suggestions. See the ``THANKS`` file in the distribution package for a (incomplete) list of contributors. Most specially, a lot of kudos go to the HDF5 and NumPy (and numarray!) makers. Without them, PyTables simply would not exist. Share your experience ===================== Let us know of any bugs, suggestions, gripes, kudos, etc. you may have. ---- **Enjoy data!** -- The PyTables Team -- Francesc Alted

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PyTrie 0.1
by George Sakkis 22 Dec '09

22 Dec '09

I'm pleased to announce the first release of PyTrie, a pure Python implementation of the trie (prefix tree) data structure [1]. Tries extend the mapping interface with methods that facilitate finding the keys/values/items for a given prefix, and vice versa, finding the prefixes (or just the longest one) of a given key K. Project links: - PyPI entry: http://pypi.python.org/pypi/PyTrie - Documentation: http://packages.python.org/PyTrie - Repository: http://bitbucket.org/gsakkis/pytrie Regards, George [1] http://en.wikipedia.org/wiki/Trie

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ANN: PyBindGen 0.13 released
by Gustavo Carneiro 21 Dec '09

21 Dec '09

PyBindGen is a Python module that is geared to generating C/C++ code that binds a C/C++ library for Python. It does so without extensive use of either C++ templates or C pre-processor macros. It has modular handling of C/C++ types, and can be easily extended with Python plugins. The generated code is almost as clean as what a human programmer would write. It can be downloaded from: http://code.google.com/p/pybindgen/ Bug reports should be filed here: https://bugs.launchpad.net/ <https://bugs.launchpad.net/pybindgen> pybindgen <https://bugs.launchpad.net/pybindgen> <https://bugs.launchpad.net/pybindgen>Documentation: http://packages.python.org/PyBindGen/ NEWS: - Lots of small bug fixes - Custodian/ward-style memory management works better now - Add 'reference_existing_object' and 'return_interal_reference' options for pointer/reference return values - New Sphinx based documentation -- Gustavo J. A. M. Carneiro INESC Porto, Telecommunications and Multimedia Unit "The universe is always one step beyond logic." -- Frank Herbert

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ANN: eGenix mx Base Distribution 3.1.3
by eGenix Team: M.-A. Lemburg 21 Dec '09

21 Dec '09

________________________________________________________________________ ANNOUNCING eGenix.com mx Base Distribution Version 3.1.3 for Python 2.3 - 2.6 Open Source Python extensions providing important and useful services for Python programmers. This announcement is also available on our web-site for online reading: http://www.egenix.com/company/news/eGenix-mx-Base-Distribution-3.1.3-GA.html ________________________________________________________________________ ABOUT The eGenix.com mx Base Distribution for Python is a collection of professional quality software tools which enhance Python's usability in many important areas such as fast text searching, date/time processing and high speed data types. The tools have a proven record of being portable across many Unix and Windows platforms. You can write applications which use the tools on Windows and then run them on Unix platforms without change due to the consistent platform independent interfaces. Contents of the distribution: * mxDateTime - Date/Time Library for Python * mxTextTools - Fast Text Parsing and Processing Tools for Python * mxProxy - Object Access Control for Python * mxBeeBase - On-disk B+Tree Based Database Kit for Python * mxURL - Flexible URL Data-Type for Python * mxUID - Fast Universal Identifiers for Python * mxStack - Fast and Memory-Efficient Stack Type for Python * mxQueue - Fast and Memory-Efficient Queue Type for Python * mxTools - Fast Everyday Helpers for Python All available packages have proven their stability and usefulness in many mission critical applications and various commercial settings all around the world. For more information, please see the distribution page: http://www.egenix.com/products/python/mxBase/ ________________________________________________________________________ NEWS The 3.1.3 release of the eGenix mx Base Distribution is the latest release of our open-source Python extensions. The new version addresses a serious problem with mxBeeBase on BSD-based platforms such as FreeBSD and Mac OS X. We encourage all users to upgrade to this new release. As always, we are providing pre-built binaries for all supported platforms: Windows 32-bit, Linux 32/64-bit, FreeBSD 32/64-bit, Mac OS X 32-bit Intel and PPC. Whether you are using a pre-built package or the source distribution, installation is a simple "python setup.py install" command in all cases. The only difference is that the pre-built packages do not require a compiler to be installed. For a list of changes, please refer to the eGenix mx Base Distribution change log at http://www.egenix.com/products/python/mxBase/changelog.html and the change logs of the various included Python packages. ________________________________________________________________________ DOWNLOADS The download archives and instructions for installing the packages can be found on the eGenix mx Base Distribution page: http://www.egenix.com/products/python/mxBase/ ________________________________________________________________________ LICENSE The eGenix mx Base package is distributed under the eGenix.com Public License 1.1.0 which is an Open Source license similar to the Python license. You can use the packages in both commercial and non-commercial settings without fee or charge. The package comes with full source code ________________________________________________________________________ SUPPORT Commercial support for this product is available from eGenix.com. Please see http://www.egenix.com/services/support/ for details about our support offerings. Enjoy, -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Dec 21 2009) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ ::: Try our new mxODBC.Connect Python Database Interface for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/

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P3D visualization package
by Massimo Di Pierro 21 Dec '09

21 Dec '09

http://www.web2py.com/p3d A Python library that generates processing.js code for 3D rendering and visualization including a pure python algorithm for computing iso- surfaces from VTK files. The generated 3D objects can rotated in the browser. Requires a browser with <canvas> support, jquery and processing.js. This is implemented in modules/p3d.py and works with any python web framework including web2py, Django and Pylons. License BSD. Massimo

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Python-announce-list December 2009