Python-announce-list July 2007

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64 participants
86 discussions

itools 0.16.3 released
by "J. David Ibáñez" 19 Jul '07

19 Jul '07

itools is a Python library, it groups a number of packages into a single meta-package for easier development and deployment: itools.catalog itools.i18n itools.tmx itools.cms itools.ical itools.uri itools.csv itools.odf itools.vfs itools.datatypes itools.pdf itools.web itools.gettext itools.rest itools.workflow itools.handlers itools.rss itools.xhtml itools.html itools.schemas itools.xliff itools.http itools.stl itools.xml Version 0.16.3 of itools does not use anymore the package uTidylib [1] (it was required by itools.cms), now the itools API for (X)HTML is used instead. But the big news this Thursday is the new file handler (named "Table") to manage structured data. This feature is still in an experimental state, the API will probably change in the next releases. Another important change, the Virtual File System (itools.vfs) now can open files in "append" mode. This is supported by the local file system layer, and by the itools.cms database. So far only the handler Table takes advantage of this feature to improve scalability. All handlers have a new method, "abort_changes", which will reset the changes made to a handler and not yet saved. Folders have an specific implementation that improves memory usage when a transaction is aborted, or fails. The itools.xhtml package has two new functions, "sanitize_stream" and "sanitize_str"; they will clean an (X)HTML fragment of potentially dangerous elements and attributes, like JavaScript code. The (X)HTML document handlers have two new methods: "to_xhtml" and "to_html". They return a byte string that represents the state of the handler, as XHTML and HTML respectively. The HTML parser is now compatible with the XML parser, the events it returns have the same structure. And the state of the HTML document handler is now identical to the state of the XHTML document handler. (This way the itools.xhtml and itools.html packages are getting closer, in preparation for a future merge.) There is a fix in the XML parser (itools.xml), it did not correctly parse attribute values when there was more than one entity reference. And another small fix in the "set_prefix" function from itools.stl, now the "<a>" tags are also processed. The reST support (itools.rest) has seen some changes to the API. First the function "to_html_events" will return an stream of (X)HTML events from a reST text. Second the new function "to_str(text, format)" is recommended over "to_xml", "to_html" and "to_latex", which become deprecated. Last, the "Document" class has been removed, as it was redundant (use the functions instead). And the usual bunch of fixes for itools.cms; most notably the new procedure for when the user forgets her password: now instead of sending a new password by email we send a link to a form that allows the user to choose her new password. Also, a number of methods have been deprecated, check the UPDATE-0.16.3 file for the details. Credits: - J. David Ibáñez worked on itools.vfs, itools.handlers, itools.xml and itools.cms; - Henry Obein fixed bugs; - Sylvain Taverne worked on itools.xhtml, itools.rest and itools.cms; Resources --------- Download http://download.ikaaro.org/itools/itools-0.16.3.tar.gz Home http://www.ikaaro.org/itools Mailing list http://mail.ikaaro.org/mailman/listinfo/itools Bug Tracker http://bugs.ikaaro.org/ -- J. David Ibáñez Itaapy <http://www.itaapy.com> Tel +33 (0)1 42 23 67 45 9 rue Darwin, 75018 Paris Fax +33 (0)1 53 28 27 88

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dbcook 0.1
by svilen_dobrev＠users.sourceforge.net 19 Jul '07

19 Jul '07

g'day. This is dbcook, a framework to cook databases from recipes, written as python declarations. Eventually the result may be edible (;-) If u're interested, have a look, dbcook/usage/example1.py might be a start. The directory-structure is still in flux - u need to get the internal dbcook/ accessible somehow (PYTHONPATH or else). Licensed as MIT-license. svn co https://dbcook.svn.sf.net/svnroot/dbcook/trunk http://dbcook.sf.net Here a short description what it probably is, and can do: A framework for declarative mapping of object hierarchies/relations into a (relational or not) database. The "language" itself is made with independence in mind, although currently all available builder stuff is over SQLAlchemy as backend (so it looks like wrapping declarative translator). It completely hides/automates the table/key/column/mapper/whatever creation. The user can only control certain characteristics of the way the mapping happens, mostly related to hierarchy and relations between objects (subclasses, instances, leafs, uniqueness etc). it's about 10 months old now. It can handle: - data column types - reference columns -> foreign keys - class inheritance, and class inclusion (inheritance without database mapping of the base), and virtual classes (those never have instances). More in mapcontext._Base - polymorphism, giving 3 kinds of queries for each mapped class: ALL, base-only, subclasses only - any combination of table-inheritance-types within the tree (concrete/joined/no-single-yet; beware that sql-polymorphism only works with joined-table for now) - automatic solving of cyclical references/dependencies (and putting proper alter_table / post_update) - associations (many2many) - implicit and explicit - more? maybe Example declarations: import dbcook.usage.plainwrap as o2r class Text( o2r.Type): pass class Address( Base): place = Text() class Person( o2r.Base): name = Text() address = o2r.Type4SubStruct( Address) friend = o2r.Type4SubStruct( 'Person') class Employee( Person): job = Text() ..... and no mentioning of tables, columns etc whatsoever ..... Once the mapping is built, any of these can be done: - use it as plain SA - session.query( class).. and similar - query-clause expressions can be automatically created from plain python functions over objects' attributes, e.g.: lambda self: (self.friend.manager.age < 40) & self.name.endswith('a') - generate a source of the equivalent plain SA-calls to build it So far it is just a library. There is no single way to use it. The directory usage/ has 2 possible reflectors (things that walk the declared classes and gather info from them), one is just plain python (plainwrap.py), another is for my static_type/ framework. You can make your own for your own taste. The usage/samanager thing tries to (correctly - context like) keep all related things in one place - mappings, dbs, engines, sessions, etc. If destroy() is requested, it'll try hard to clear all side-effects of its existence. Certain pieces are (almost) independent and are usable as is without all the rest: expression.py, usage/hack*py, sa_generator.py - all SQLAlchemy related. The tests/ directory contains 2 types of tests - sa/ which proves that the way SA is used in dbcook is correct/working, and mapper/other which check whether the cooker does right thing as result. It still uses makefile to run all stuff. external dependencies: - needs kjbuckets (from gadfly) for graph-arithmetics - needs sqlalchemy, 0.3.6+? - optional static_type/ framework - makes staticly-declared structs (a-la java/C semantics) in python - do mail if interested. Some todo's, long- or short- term: - nicer/some way of declaring collections (SA: relation(.. use_list=True)) - some documentation, translate all in both languages. - tests for all the stuff, in most of combinations, instead of just trying this/that - generate sql-server-side functions, triggers etc - autoload / reverse-engineering - single-table inheritance - other reflectors/"syntaxes" - e.g. elixir-like - concrete-polymorphism: polymunion of (type,id) key have fun svil svilen_dobrev at users point sourceforge point net Might be easier to reach me at sqlalchemy's newsgroup. -------------- <P><A HREF="http://dbcook.sf.net">dbcook 0.1</A> - A framework for declarative mapping of object hierarchies/relations into a (relational or not) database. (19-jul-2007)

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Python related activities at OSCon 2007 next week
by Michael Pittaro 18 Jul '07

18 Jul '07

I've been getting ready for OSCon 2007 next week, and theres quite a bit of Python related activity there. Based on a suggestion from Jeff Rush, (who can't be there), I've proposed a Python Advocacy BoF on Monday, from 6:30pm - 7:30pm. For anyone arriving early, this will be a great opportunity to coordinate Python advocacy activites at OSCon. Theres also a regular Python BoF on Wednesday from 8:30pm - 9:30pm. Apart from those, I've tagged [1] a bunch of sessions I felt were Python related. This list includes sessions outside the main Python track. [1] see: http://blog.snaplogic.org/?p=61 or http://del.icio.us/mikeyp/oscon2007%2Boscon_python -- mikeyp(a)snaplogic.org http://www.snaplogic.org

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Publication of Hachoir project version 1.0
by Victor Stinner 18 Jul '07

18 Jul '07

Hachoir is a framework for binary file manipulation: file format recognition, metadata extraction, search files in any binary stream (forensics), view file content with human representation, etc. It's composed of many component: Programs: * hachoir-metadata: fault tolerant metadata extraction; * hachoir-subfile: search subfiles in a disk image or any other binary stream; * hachoir-urwid, hachoir-wx, hachoir-gtk, hachoir-gtk: user interface to view file content (curses, wxPython, pygtk, web+ajax); Modules: * hachoir-core: library to split binary data into a field tree; * hachoir-parser: collection of 70 file format parsers; * hachoir-regex: regular expression optimization/manipulation and pattern matching (used by hachoir-subfile). Project website: http://hachoir.org/ List of supported file formats: http://hachoir.org/wiki/hachoir-parser#Listofparsers (jpeg, ttf, exe, rar, ogg, ntfs, ole2, torrent, ...) Examples of metadata extraction: http://hachoir.org/wiki/hachoir-metadata/examples hachoir-wx screenshots: http://hachoir.org/wiki/hachoir-wx#Screenshots Hachoir works any operating system and only depends on Python (2.4+). Packages are available for Debian, Mandriva, Gentoo, Arch and FreeBSD. hachoir-core goal is to ease binary parser writing. It takes care of endian problem, has bit resolution (for addresses and sizes), and only use Unicode charset for text. It gives a nice API to the programmer (see parsers source code): each field is an object. A parser is lazy: its value, display string, description, etc. is computed on demand (when the program ask it). So it's possible to parse very complex structures and huge files (60 GB or more is not a problem). hachoir-core and hachoir-metadata are "fault tolerant": on parser/ extractor error or file error (truncated or damaged file), the program doesn't stop but continue to next valid state. It allows to extract informations on very damaged files. hachoir-metadata create a dictionary with typed values: track number is an integer, creation date is datetime.datetime object, etc. and all text are stored as Unicode string. The API allows easy reuse of extracted data. Source code has good code coverage with automatic tests (lot of testcases). Fuzzing is sometimes used to find more bugs. Some experimental programs exist like hachoir-strip: program to remove personal information (author name, timestamp, copyright, etc.) from a picture, movie, sound, archive, etc. Another example: swf_extract.py allows to extract pictures and sounds from a SWF (Flash) document. Victor Stinner aka haypo

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IMDbPY 3.1 released
by Davide Alberani 18 Jul '07

18 Jul '07

IMDbPY 3.1 is available (tgz, deb, rpm, exe) from: http://imdbpy.sourceforge.net/ IMDbPY is a Python package useful to retrieve and manage the data of the IMDb movie database about both movies and people. In this release there are many fixes to stay up-to-date with the new IMDb's layout. Moreover there is support for the new 'synopsis' and 'parents guide' pages. Platform-independent and written in pure Python (and few C lines), it can retrieve data from both the IMDb's web server and a local copy of the whole database. IMDbPY package can be very easily used by programmers and developers to provide access to the IMDb's data to their programs. Some simple example scripts are included in the package; other IMDbPY-based programs are available from the home page. -- Davide Alberani <alberanid(a)libero.it> [PGP KeyID: 0x465BFD47] http://erlug.linux.it/~da/

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pyIDL 0.6 released
by Michael McKerns 18 Jul '07

18 Jul '07

updated Python bindings for IDL http://www.its.caltech.edu/~mmckerns/software.html # Version 0.6: 07/18/07 added support for idl_6.4 fixed boolean support in direct IDL function/procedure calls (Thanks to G. Novak for his patch) --- Mike McKerns California Institute of Technology http://www.its.caltech.edu/~mmckerns

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Pydev 1.3.8 Released
by Fabio Zadrozny 18 Jul '07

18 Jul '07

Hi All, Pydev and Pydev Extensions 1.3.8 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: ----------------------------------------------------------------- * Code-analysis: Detects mixing of spaces and tabs. * Code-analysis: Reimport not flagged when inside of try..except ImportError. Release Highlights in Pydev: ---------------------------------------------- * Fixed problems related to the pydev package explorer that appeared when using java 1.6 (ConcurrentModificationException) * Other minor bug-fixes 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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ANN: Python for Math Teachers (5 ShowMeDos)
by Ian Ozsvald 18 Jul '07

18 Jul '07

Summary: Kirby Urner introduces Python for math teachers: http://showmedo.com/videos/series?name=JkD78HdCD Detail: Kirby gives an introduction to math topics and Python, moves on to subclassing (OOP), RSA cryptography and graphics using Stickworks (built on VPython). About ShowMeDo.com: Free videos (we call them ShowMeDos) showing you how to do things. The videos are made by us and our users, for everyone. 127 Python videos: http://showmedo.com/videos/python We'd love to have more contributions - would you share what you know? Sharing is easy, full instructions are here: http://showmedo.com/submissionsForm The founders, Ian Ozsvald, Kyran Dale -- http://ShowMeDo.com http://ShowMeDo.com/about (our pictures) http://blog.ShowMeDo.com http://forums.ShowMeDo.com Ian(a)ShowMeDo.com

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ANN: yolk 0.3.0
by Rob Cakebread 16 Jul '07

16 Jul '07

yolk ==== http://tools.assembla.com/yolk July 16, 2007 - 0.3.0 Release Changes: -------- Added -L and -C options for Cheese Shop's new XML-RPC methods 'changelog' and 'release_updates' Added -F option to fetch source, egg or do a subversion checkout Added 'svn' option for -T Better package name list cache handling What is yolk? ------------- Yolk is a command-line tool for querying The Cheese Shop and your installed Python packages. Yolk is in the early stages of development but you may find it useful. Some Features ------------- * Show which installed packages have newer versions available by querying PyPI * List Python packages installed by distutils, setuptools, or easy_install * Determine which packages are activated or not (--multi-version) * Determine which packages are deployed in development mode * Examine package metadata * Show dependencies of packages installed by setuptools, if available * Query PyPI for various package information using XML-RPC interface * Examine entry maps and entry points for setuptools deployed Python packages * Determine download URL or subversion checkout URL of a package * Easily download source, egg or do a subversion checkout by simply giving the package name * Check latest releases on The Cheese Shop or detailed Cheese Shop ChangeLog * Determine which pkgs were installed by distutils/setuptools or your package manager (Gentoo only so far) * And if none of that interests you, a little Red Leicester then, perhaps? Note: ----- With Python<=2.3 yolk only lists installed packages if the setup.py uses setuptools or if the package was installed via easy_install. Users of Python>=2.5 get the whole enchillada. Where can I get it? ------------------- 'easy_install -U yolk' http://cheeseshop.python.org/packages/source/y/yolk/yolk-0.3.0.tar.gz http://cheeseshop.python.org/packages/2.5/y/yolk/yolk-0.3.0-py2.5.egg yolk is available in Gentoo's portage system as 'dev-python/yolk' License ------- yolk is Copyright 2007 Rob Cakebread, released under the terms of the GPL-2

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ANN: "5 Minutes with Python" (3 ShowMeDos)
by Ian Ozsvald 16 Jul '07

16 Jul '07

Summary: Jeff Rush and Ian Ozsvald introduce a new series which will show some of the possibilities offered by Python using 5 minute videos: http://showmedo.com/videos/series?name=L3dNy3tjR We'd like others to help us extend this Advocacy series, do get in contact if you are interested in helping. Detail: Jeff begins with two videos: "Python and the Interactive Shell 'IPython'" "A Demonstration of ReStructuredText" and Ian one: "First 5 Minutes with Python" which are aimed at those who want to see what Python is capable of. Further detail in these blog posts: http://blog.showmedo.com/2007/07/13/showmedo-5-minutes-with-python-ipython-… http://blog.showmedo.com/2007/07/14/showmedo-5-minutes-with-python-restruct… http://blog.showmedo.com/2007/07/15/showmedo-5-minutes-with-python-first-5-… About ShowMeDo.com: Free videos (we call them ShowMeDos) showing you how to do things. The videos are made by us and our users, for everyone. 122 Python videos: http://showmedo.com/videos/python We'd love to have more contributions - would you share what you know? Sharing is easy, full instructions are here: http://showmedo.com/submissionsForm The founders, Ian Ozsvald, Kyran Dale -- http://ShowMeDo.com http://ShowMeDo.com/about (our pictures) http://blog.ShowMeDo.com http://forums.ShowMeDo.com Ian(a)ShowMeDo.com

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Python-announce-list July 2007