Mailman 3 February 2008 - Python-announce-list

ANN: amplee 0.6.0 - AtomPub Python implementation
by Sylvain Hellegouarch 18 Feb '08

18 Feb '08

Hi all, I'm glad to announce the release of amplee in version 0.6.0 == Overview of this release == This release is an important move from previous releases as it doesn't include support for any HTTP layer out of the box anymore. The reason is that it made the previous API needlessly complex and stopped people to actually use amplee for what it aims at being: one simple representation of the AtomPub protocol server side. Basically I wish amplee was used as a library rather than as a host for AtomPub applications. The 0.6.x branch will focus therefore on polishing the AtomPub model API as well as the related sub-packages such as the index and graph extension. Moreover I would like to improve the performance of amplee although they have already improved since 0.5.x. The graph sub-package is a first stab at using graph theory via the igraph [1] package to perform foxy manipulations of Atom feeds. One major change since 0.5.x is the move from bridge [2] to Amara [3] to parse, query and generate XML documents within amplee. I think that change was for the best considering the capabilities of Amara. Another change is that I've dropped the INI file format for configuration and loading an amplee structure. Instead you can now directly use the XML service document itself and complete using a bit of extra code. That allows for some funny capabilities such as mirroring existing AtomPub service document (see the example directory for instance [4]). I would like to thank Eric Larson [5] and Mohanaraj Gopala Krishnan for their feedback and patience. They have provided the project with a tremendous help. == Download == * easy_install -U amplee * Tarballs http://www.defuze.org/oss/amplee/ * svn co https://svn.defuze.org/oss/amplee/ == Documentation == Home page: http://trac.defuze.org/wiki/amplee API: http://www.defuze.org/oss/amplee/api-0.6.0/ Tutorial (sort of): http://trac.defuze.org/wiki/amplee/Tutorial-0.6.x == TODO == * Add more tests * Improve documentation * Improve performance * Improve the graph and index sub-packages Have fun, -- Sylvain Hellegouarch http://www.defuze.org [1] http://cneurocvs.rmki.kfki.hu/igraph/ [2] http://trac.defuze.org/wiki/bridge [3] http://uche.ogbuji.net/tech/4suite/amara/ [4] http://trac.defuze.org/browser/oss/amplee/amplee/examples/miror [5] http://ionrock.org/

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Python-URL! - weekly Python news and links (Feb 18)
by Gabriel Genellina 18 Feb '08

18 Feb '08

QOTW: "Syntax can be, and has been, interoperable. The definitions of the telephone network, the Internet, email, and the Web are all bits-on-the-wire definitions of what you send back and forth, and they've all worked well enough to change the world. This belief that bits-on-the-wire is more important than data structures or APIs is at the center of my world view." - Tim Bray, author of, for example, "What is RDF" "Given this indispensable process and architecture issue, isn't it obvious that it's totally irrelevant to the system's overall safety whether the compiler has performed the further smattering of semantically puny 'verifications' allowed by mandatory-declaration, stating-typing languages?" - Alex Martelli A problem with itertools.groupby: groups apparently were being "emptied" before use: http://groups.google.com/group/comp.lang.python/browse_thread/thread/f98e52… Should __doubleunderscore__ names be defined by a programmer? http://groups.google.com/group/comp.lang.python/browse_thread/thread/999b15… Floating point numbers, Decimals, the upcoming Fraction type (rational) and their limitations: http://groups.google.com/group/comp.lang.python/browse_thread/thread/50e0e3… Also "inf" and "nan" support: http://groups.google.com/group/comp.lang.python/browse_thread/thread/3fd33c… Very simple RSS/Atom generators: http://groups.google.com/group/comp.lang.python/browse_thread/thread/6ac9d6… Looking for replacements to C's __FILE__ and __LINE__ macros: http://groups.google.com/group/comp.lang.python/browse_thread/thread/34f3ef… Regular expression for prime numbers (?!) http://groups.google.com/group/comp.lang.python/browse_thread/thread/b30c69… Notes on how Python manages memory: http://groups.google.com/group/comp.lang.python/browse_thread/thread/4f9063… The longest thread this week is absolutely off topic, and started two weeks ago: the speed of light, archery as an esoteric knowledge, is pound a unit of mass?, wavicles...: http://groups.google.com/group/comp.lang.python/browse_frm/thread/8c7c359b6… ======================================================================== 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 Steve Bethard continues the marvelous tradition early borne by Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim Lesher 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/ 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: Phatch = PHoto bATCH processor and renamer based on PIL
by Stani 18 Feb '08

18 Feb '08

I'm pleased to announce the release of Phatch which is a powerful batch processor and renamer. Phatch exposes a big part of the Python Imaging Library through an user friendly GUI. (It is using python-pyexiv2 to offer more extensive EXIF and IPTC support.) Phatch is not targeted at manipulating individual pictures (such as with Gimp), but repeating the same actions on hundreds or thousands of images. If you know PIL and have some nice recipes laying around, it is very easy to write plugins as Phatch generates the corresponding GUI automagically just like in Django. Any existings PIL scripts can be added very easily. Let me know if you want to contribute or have any questions. Homepage: http://photobatch.stani.be (free download link below) Tutorials: http://photobatch.wikidot.com/tutorials Translations: https://translations.launchpad.net/phatch/trunk/+pots/phatch License: GPLv3 Screenshot: http://photobatch.wikidot.com/local--files/start/Screenshot-Phatch3d.jpg (the perspective and reflection is produced by Phatch itself) Phatch has many features, like: - EXIF information inspector with thumbnail - limit jpeg file size when saving - tons of actions organized by tags (including perspective, round corners, shadow, reflection, ...) - console version (Phatch can now run without a gui on servers) - batch rename and copy files based on exif metadata - data stamping (http://photobatch.wikidot.com) - online documentation wiki (http://photobatch.wikidot.com) Linux only features: - desktop or panel droplets on which images or folders can be dropped (will be ported to Windows & Mac) - Nautilus and desktop integration (with its own mime type and nautilus extension) - manpage with examples With python-pyexiv2 the following featues are added: - embedding the original EXIF and IPTC tags in the image All actions mostly have a separate pil function in their source code, so they could be read as a recipe book for PIL: * Auto Contrast - Maximize image contrast * Background - Put colour under transparent image * Border - Crop or add border to all sides * Brightness - Adjust brightness from black to white * Canvas - Crop the image or enlarge canvas without resizing the image * Colorize - Colorize grayscale image * Common - Copies the most common pixel value * Contrast - Adjust from grey to black & white * Convert Mode - Convert the color mode of an image (grayscale, RGB, RGBA or CMYK) * Copy - Copy image file * Effect - Blur, Sharpen, Emboss, Smooth, ... * Equalize - Equalize the image histogram * Fit - Downsize and crop image with fixed ratio * Grayscale - Fade all colours to gray * Invert - Invert the colors of the image (negative) * Maximum - Copies the maximum pixel value * Mask - Apply a transparency mask * Median - Copies the median pixel value * Minimum - Copies the minimum pixel value * Offset - Offset by distance and wrap around * Posterize - Reduce the number of bits of colour channel * Perspective - Shear 2d or 3d * Rank - Copies the rank'th pixel value * Reflect - Drops a reflection * Rename - Rename image file * Rotate - Rotate with random angle * Round - Round or crossed corners with variable radius and corners * Saturation - Adjust saturation from grayscale to high * Save - Save an image with variable compression in different types * Scale - Scale an image with different resample filters. * Shadow - Drop a blurred shadow under a photo with variable position, blur and color * Solarize - Invert all pixel values above threshold * Text - Write text at a given position * Transpose - Flip or rotate an image by 90 degrees * Watermark - Apply a watermark image with variable placement (offset, scaling, tiling) and opacity I develop Phatch on Ubuntu/Linux, but I have tested and polished it regularly on Windows and Mac Os X. (Only the droplet functionality needs to be ported.) Phatch is submitted to Debian unstable and Ubuntu Hardy. Packagers for other platforms are welcome. Requirements: - PIL 1.1.5 or higher - wxPython 2.6 or higher - pyexiv2 (optional) - python nautilus bindings (optional) Best regards, Stani -- http://pythonide.stani.be

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PyAMF 0.1.1 released
by Thijs Triemstra | Collab 18 Feb '08

18 Feb '08

We released PyAMF 0.1.1, a lightweight library that allows Flash and Python applications to communicate via Adobe's ActionScript Message Format. AMF3 and RemoteObject are supported in all the implemented Remoting gateways, currently supported for Django, Twisted, Web2Py and WSGI. This is bugfix release with the following important changes: - AMF3 encoder reported byte length header for non-ASCII string data (patch supplied by akaihola) - Decoder context not cleared between reading the remoting header and body. Check out the download page [1], installation instructions [2] and examples [3]. Questions? First stop is the mailing list [4], but we also hang out on [5]. Cheers, - the PyAMF team [1] http://pyamf.org/wiki/Download [2] http://pyamf.org/wiki/Install [3] http://pyamf.org/wiki/Examples [4] http://pyamf.org/wiki/MailingList [5] irc://freenode.net/pyamf

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MMA - Musical MIDI Accompaniment Version 1.3
by bvdp 15 Feb '08

15 Feb '08

Version 1.3 of MMA - Musical MIDI Accompaniment - is now available for downloading. Included in this release: Extended MIDI voicing now supported -- it is now easy to set any voice you have on your sequencer! A SWELL command (increase then restore volume over a number of bars), A number of minor bug fixes and enhancements. See the entire change log in the included CHANGES-1.2 file. MMA is a accompaniment generator -- it creates midi tracks for a soloist to perform with. User supplied files contain pattern selections, chords, and MMA directives. For full details please visit: http://www.mellowood.ca/mma/ MMA is entirely written in Python. If you have any questions or comments, please send them to: bob(a)mellowood.ca

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RELEASED: Pymacs 0.23
by François Pinard 15 Feb '08

15 Feb '08

Hello to everybody, and Emacs users in the Python community. Here is Pymacs 0.23! There has been a while, so I advise current Pymacs users to switch with caution. All reported bugs have been squashed, if we except one about Emacs quit (C-g) not being obeyed gracefully. A few suggestions have been postponed, to be pondered later. The manual is now in reST format, and everything Allout is gone. Postscript and PDF files are not anymore part of the distribution, you may find them on the Web site, or use the Makefile if you have needed tools. Examples have been moved out of the manual into a new contrib/ subdirectory, which also holds a few new contributions. The example of a Python back-end for Emacs Gnus has been deleted. Python 1.5.2 compatibility has been dropped; use Python 2.2 or better. The Pymacs manual explains installation procedure, now simplified. The pymacs-services script is gone, this should ease installing Pymacs on MS Windows. There is also a small, still naive validation suite. The communication protocol has been revised: more clarity, less magic. Zombie objects are less dreadful by default. The API now supports False and True constants, and Unicode strings (within limits set by Emacs). Special thanks to those who helped me at creating or testing this release. -------------------- Pymacs is a powerful tool which, once started from Emacs, allows both-way communication between Emacs Lisp and Python. Pymacs aims Python as an extension language for Emacs rather than the other way around, and this asymmetry is reflected in some design choices. Within Emacs Lisp code, one may load and use Python modules. Python functions may themselves use Emacs services, and handle Emacs Lisp objects kept in Emacs Lisp space. The main Pymacs site is `http://pymacs.progiciels-bpi.ca/', and you may fetch `http://pymacs.progiciels-bpi.ca/archives/Pymacs.tar.gz'. Report problems and suggestions to `mailto:pinard@iro.umontreal.ca'. -- François Pinard http://pinard.progiciels-bpi.ca

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[ANN] Release 0.69.1 of Task Coach
by Frank Niessink 14 Feb '08

14 Feb '08

Hi, I'm happy to announce release 0.69.1 of Task Coach. This bug fix release addresses three bugs introduced in the previous release. Bugs fixed: * Exception when closing a task editor dialog. This causes updates of task states not to be displayed properly. The bug itself does not cause data loss, but it might trick users into saving an empty task file over their existing data. * On Mac OS X, users couldn't enter 'P' and 'M' in text boxes, because these were mapped to menu items. Reorganized keyboard shortcuts to fix this. * The arrow ('→') and infinity symbol ('∞') are not visible on all computers, so Task Coach is back to using '->' and 'Infinite' again. What is Task Coach? Task Coach is a simple task manager that allows for hierarchical tasks, i.e. tasks in tasks. Task Coach is open source (GPL) and is developed using Python and wxPython. You can download Task Coach from: http://www.taskcoach.org In addition to the source distribution, packaged distributions are available for Windows XP/Vista, Mac OSX, and Linux (Debian and RPM format). Note that Task Coach is alpha software, meaning that it is wise to back up your task file regularly, and especially when upgrading to a new release. Cheers, Frank

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CodeInvestigator version 0.7.2
by Martien Friedeman 14 Feb '08

14 Feb '08

CodeInvestigator version 0.7.1 was released on February 7. This release fixes a bug. There was a bug in the Status window that appears when the "Details" button is clicked. The "Stop" button in that window caused a crash. CodeInvestigator is a tracing tool for Python programs. Running a program through CodeInvestigator creates a recording. Program flow, function calls, variable values and conditions are all stored for every line the program executes. The recording is then viewed with an interface consisting of the code. The code can be clicked: A clicked variable displays its value, a clicked loop displays its iterations. You read code, and have at your disposal all the run time details of that code. A computerized desk check tool and another way to learn about your program. http://sourceforge.net/project/showfiles.php?group_id=183942

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Regular Toronto Python User's Group Meeting on Tuesday the 19th
by Mike C. Fletcher 14 Feb '08

14 Feb '08

We'll be having our regular PyGTA meeting on Tuesday the 19th of February. We'll start at 7pm, as normal, at Linux Caffe, on the corner of Grace and Harbord. Presenter: Ennio Cellucci Topic: Using Python and Povray to animate the Lorenz Attractor Description: "A couple of years ago, I used Visual Python to render the Lorenz Attractor in 3D as both an sold model and an anaglyph. I've taken this code and used a library to help create a Povray scene. The scene animates the creation and fly-through of the chaotic model." Links to maps available on the web-site: http://www.pygta.org Also, if you have a topic idea for March, please send it along. I will be at the PyCon sprints in Chicago that Tuesday, so I would like to get the meeting arranged well in advance. Have fun all, Mike -- ________________________________________________ Mike C. Fletcher Designer, VR Plumber, Coder http://www.vrplumber.com http://blog.vrplumber.com

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RELEASED Python 2.5.2, release candidate 1
by "Martin v. Löwis" 14 Feb '08

14 Feb '08

On behalf of the Python development team and the Python community, I'm happy to announce the release of Python 2.5.2 (release candidate 1). This is the second bugfix release of Python 2.5. Python 2.5 is now in bugfix-only mode; no new features are being added. According to the release notes, over 100 bugs and patches have been addressed since Python 2.5.1, many of them improving the stability of the interpreter, and improving its portability. For more information on Python 2.5.2, including download links for various platforms, release notes, and known issues, please see: http://www.python.org/2.5.2/ Highlights of this new release include: Bug fixes. According to the release notes, at least 100 have been fixed. Highlights of the previous major Python release (2.5) are available from the Python 2.5 page, at http://www.python.org/2.5/highlights.html Enjoy this release, Martin Martin v. Loewis martin(a)v.loewis.de Python Release Manager (on behalf of the entire python-dev team)

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