Python-announce-list May 2003

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56 participants
68 discussions

PyScilab. Scilab into Python. Release 0.0.1: Acid apple.
by Rodrigo Benenson 17 May '03

17 May '03

PyScilab. Scilab into Python. Release 0.0.1: Acid apple. This is an inmature release oriented to programmers who could help to the development of the package. The code is functional but there are some topics missing. The source code is aviable at: http://pdilib.sf.net If you don't know what is python nor scilab http://www.scilab.org, the best free matrix computation package aviable. http://www.python.org, the best free general use scripting language aviable. README --------------------------------------------------------------- PyScilab. Rodrigo Benenson. 2003. under GPL. Release 0.0.1: THIS AN HACKER RELEASE, NOT RECOMENDED FOR END USERS The main objective are: - allow to python devellopers to use a true matrix processing system. - allow the scilab users to use they function in other contexts. - to have a true pythonic interface. The expected methods are: - init and destroy scilab sessions - create matrix, vectors, lists, (sciobjects in general) - automaticaly detect the aviable functions - offer a pythonic interface to call all of this functions - allow operators between sci objects - allow plotting The aviables methods are: - init an scilab session - create matrix, vectors, numbers - allow pythonic scilab code calls - allow pythonic scilab data retreival Example session (real example, with release 0.1): scilab = ScilabSession(SCI= os.getcwd() + '/scilab-2.7/', STAR = os.getcwd() + '/scilab.star', ) print 'setting a, and b' a = [[1,2],[3,4]] b = [[5,6],[7,8]] scilab['a'] = a scilab['b'] = b print 'a:', scilab.get('a') print 'b:', scilab.get('b') print print 'calling "c= a + b"' scilab.call('c= a + b') print 'Obtaining the result' print 'c : ', scilab['c'] print print 'calling "c= a * b"' scilab.call('c= a * b', a= [5,3], b= 2) print 'c : ', scilab['c'] print print 'calling "e= svd(a), a = [1,2;3,4]"' scilab.call('e= svd(a)', a= a) print 'Obtaining the result' print 'e:', scilab['e'] print returns [rodrigob@localhost pyscilab]$ python2.2 ./pyscilab.py PyScilab test. ========== scilab-2.7 Copyright (C) 1989-2003 INRIA/ENPC ========== Starting with exec("/home/rodrigob/projets/pyscilab/scilab.star",-1);quit; Startup execution: loading initial environment setting a, and b a: [[ 1. 2.] [ 3. 4.]] b: [[ 5. 6.] [ 7. 8.]] calling "c= a + b" Obtaining the result c : [[ 6. 8.] [ 10. 12.]] calling "c= a * b" c : [[ 10.] [ 6.]] calling "e= svd(a), a = [1,2;3,4]" Obtaining the result e: [[ 5.4649857 ] [ 0.36596619]] Know bugs: - Any window invoking function should crash the python (please fix it!) - The instalation is tricky and will probably fail - If the objects are not matrix, vectors or numbers, everything crash Feedback: This realease is an acid green apple. Please, help us, report a succesfull compilation, report an unsuccesfull compilation, hack the setup.py to be more flexible, hack the code to allow plotting, report a successfull usage or just say hello. Please fell free to mail any feedback at rodrigob at elo dot utfsm dot cl Other notes: The development is made using Leo, the outline editor. http://leo.sf.net Look at the pyscilab.leo file for more info.

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ANN: Another release of SalStat (20030513)
by alan_salmoni＠yahoo.com 15 May '03

15 May '03

Hi everyone, Just to announce a new release of the SalStat Statistics Package, the cross-platform, Python/wxPython powered application for scientific statistical analysis (version 20030513). There is a self-installing Windows binary for people who don't have Python (so why am I telling this to this list then???), and for everyone else, the source code is available. Website is: http://salstat.sunsite.dk Source code: http://salstat.sunsite.dk/salstat.20030513.zip Binary for Win32: http://salstat.sunsite.dk/salstat.20030513.setup.exe Download page: http://salstat.sunsite.dk/download.html I have also been tabled to talk about SalStat at EuroPython - I'm not exactly sure what shape the talk will be in, but I'm working on it. Hope to meet a lot of you people there! Have fun and be good! Alan.

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Sydney, Australia: Python Interest Group: Monday 19th May
by Mary Gardiner 14 May '03

14 May '03

Hi everyone, The Sydney Python Interest Group is on this Monday. Alan Green will talk about "Python Web Services using the Zolera SOAP Infrastructure". He will begin with a quick introduction to Web Services. and then move onto implementing both "quick and dirty" and "proper" web services. Date: Monday May 19th Time: 7:00pm Location: University of Technology, Sydney (UTS) Broadway campus, building 10, room 2.440 (computer lab, on the entrance level). -Mary ---- Sydney Python Interest Group meetins are announced on: * comp.lang.python.announce and python-announce-list(a)python.org[0] * the Australasian Python users list[1] * The Sydney Linux User's Group announce list[2] [0] http://mail.python.org/mailman/listinfo/python-announce-list [1] http://starship.python.net/mailman/listinfo/python-au [2] http://lists.slug.org.au/listinfo/announce/ ---- The Sydney Python Interest Group is, while not restricted to Python on Linux, a Special Interest Group of the Sydney Linux Users Group (SLUG), and would like to thank SLUG for its support. See the PIG webpage: http://pig.slug.org.au/ for previous talks.

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[ANNOUNCE] PythonCAD mailing list now available
by Art Haas 14 May '03

14 May '03

Hi. I'm pleased to announce that a mailing list for PythonCAD is now active. Visit the following page for information about subscribing to the list: http://mail.python.org/mailman/listinfo/pythoncad My thanks to Barry Warsaw for setting up the list on the Python home. Art Haas -- To announce that there must be no criticism of the President, or that we are to stand by the President, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public. -- Theodore Roosevelt, Kansas City Star, 1918

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ANN: eGenix mxODBC Zope Database Adapter, Version 1.0.6
by M.-A. Lemburg 14 May '03

14 May '03

________________________________________________________________________ ANNOUNCEMENT EGENIX.COM mxODBC Zope Database Adapter Version 1.0.6 Available for Zope 2.3 - 2.6 on Windows, Linux and Solaris ________________________________________________________________________ INTRODUCTION The eGenix mxODBC Zope Database Adapter (Zope DA) allows you to easily connect your Zope installation to just about any database backend on the market today, giving you the reliability of the commercially supported eGenix.com product mxODBC and the flexibility of the ODBC standard as middle-tier architecture. Unlike Zope's ZODBC Zope DA, the mxODBC Zope DA works on Windows XP/NT/2000/98/95, Linux and Solaris using the same interface on all platforms. The mxODBC Zope DA implements thread-safe connection pooling and multiple physical connects per logical Zope connection. You can safely run Z SQL Methods in parallel, achieving a much better performance than ZODBC Zope DA or similar Zope database adapters under heavy load. This makes it ideal for deployment in Zope Clusters and Zope hosting environments where stability and high performance are a top priority. ________________________________________________________________________ FEATURES * Zope Level 3 Database Adapter: the mxODBC Zope DA is fully multi-threaded and can handle multiple connections to multiple databases. * Fully compatible to Z SQL Methods. * Drop-in compatible to the ZODBC DA: the mxODBC Zope DA provides the same interfaces as Zope's ZODBC DA to allow a smooth upgrade path from this simplistic adapater to the high performance mxODBC Zope DA. * Fully compatible to the Znolk SQL Wizard Product and other similar products relying on the common database schema access methods .tables() and .columns(). * Connection Pooling: physical database connections are pooled and kept open, to reduce the connection overhead to a minimum. This is especially important for high latency database connections and ones like Oracle which take a considerable amount of time to setup * Parallel Execution of Queries on a single logical connection: the mxODBC Zope DA can manage any number of physical connections on a single logical connection. This enables running truly parallel Z SQL Method queries -- a feature not available in other Zope DAs. * Robust Mode of Operation: connections which have timed out or go away due to network problems are automatically reconnected. * Cross-platform Connection Objects: The Zope DA will automatically choose the right platform specific ODBC manager for you. * Per Connection Adjustable ODBC Interface: mxODBC comes with many different subpackages to choose from on Unix. The Zope DA allows you to select these subpackages on a per-connection basis. * Per Connection Error Handling: you can tell each connection whether it should report ODBC warnings or not; furthermore all warnings and errors are made available as list .messages on the DatabaseConnection object. * Transaction safe automatic reconnect: when the DA finds that a connection has timed out, it automatically tries a reconnect and replays the transaction on the connection (unlike other DAs which break the transaction scheme by doing a reconnect without replay). * Built-in Schema Cache: this results in improved performance under heavy load. * Database Schema Access: all ODBC catalog methods are made available for much better database schema inquiry. The catalog methods allow building generic database interrogation or manipulation tools and facilitates writing database independent Zope products. * Lazy Connect: the mxODBC Zope DA only connects to the database backends when a connection is actually requested. This results in a better use of resources compared to other Zope DAs. ________________________________________________________________________ NEWS Version 1.0.6 includes the following changes and enhancements: * The lazy connect feature was turned into a per-connection option. This gives you more control over which connections are maintained in connect-on-demand state and which are always connected. * A new option was introduced to let the mxODBC Zope DA return the natively used mxDateTime values instead of converting them to Zope's DateTime instances. This is a faster if you're dealing with a lot of date/time values and also provides more flexibility in data access. See the mxDateTime documentation for full details on what this package can offer. * A bug in the version 1.0.5 lazy connect feature was fixed. In short: mxODBC Zope DA is continuing to become the number one solution for integrating relational databases with Zope applications. ________________________________________________________________________ UPGRADING If you have already bought mxODBC Zope DA licenses, you can use these license for the updated version as well. There is no need to buy new licenses. The same is true for evaluation license users. ________________________________________________________________________ MORE INFORMATION For more information on the mxODBC Zope DA, licensing and download instructions, please visit our web-site: http://www.egenix.com/ You can buy mxODBC Zope DA licenses online from the eGenix.com shop at: http://shop.egenix.com/ ________________________________________________________________________ Thank you, -- Marc-Andre Lemburg eGenix.com Professional Python Software directly from the Source (#1, May 14 2003) >>> Python/Zope Products & Consulting ... http://www.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ EuroPython 2003, Charleroi, Belgium: 41 days left

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ANN: matplotlib-0.2 matlab style plotting for python
by John Hunter 14 May '03

14 May '03

Announcing Matplotlib 0.2 matplotlib is a pure python plotting library designed to bring publication quality plotting to python with a syntax familiar to matlab users. Although the goal of publication quality is not yet attained, the library does produce high quality 2D plots. All of the plotting commands can be accessed either via a functional interface familiar to matlab users or an object oriented interface familiar to python users. http://matplotlib.sourceforge.net matplotlib requires python2.2, Numeric-22+ and pygtk-1.99.16, and should run anywhere those packages are available. It has been tested under linux and win32. The following matlab compatible plotting commands are provided: axes, axis, bar, close, errorbar, figure, gca, gcf, get, hist, plot, scatter, set, subplot, text, title, xlabel, ylabel What's new in 0.2 Font handling - Major improvements in font and text handling. matplotlib 0.1 drew all text in the same, non-configurable font. In 0.2, font name, size, weight, and angle, color, rotation, and more are easily configurable. See the text tutorial on the website Multiple figures -- Multiple figures supported with the figure command. See the Working with multiple figures and axes in the tutorial Interactive shell -- Interactive use from the python shell if you have pygtk compiled with threads. See Using matplotlib interactively. Saving figures- Ability to save figures in arbitrary resolution PNG or TIFF with a bug fix that caused saved figures to be corrupted by anything blocking the figure window. A GUI widget has been added to the figure toolbar to save figures and a new comand savefig has been added. Navigation - A new and hopefully improved navigation toolbar has been added that doesn't require a wheel mouse, but still works with one. See the Navigation tutorial. More examples and screenshots - New examples and screenshot illustrating the new text functionality, the new plot types, and new commands. See the examples subdirectory in the src distribution. Patches - A Patch class added for drawing patches (rectangles, polygons, circles). This supports three new plotting commands scatter, hist and bar, with more to come. New commands - New plotting commands bar, close, errorbar, figure, hist, text, scatter, savefig, ylabel. Matplotlib on sourceforge - matplotlib homepage moved to sourceforge with a (hopefully) more useful homepage. Documentation - Much better documentation and a tutorial. Refactoring - Substantial rewrite of class library. All text now handled by the AxisText class in text.py. Axis handling refactored into a dedicated class Axis defined in figure.py.

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SkunkWeb 3.4b3
by Jacob Smullyan 14 May '03

14 May '03

SkunkWeb 3.4b3 has been released. What It Is ---------- SkunkWeb is a configurable, extensible, scalable and robust high-performance multi-process Python web application server with a powerful templating system that encourages component based design. It is known to work on Linux, FreeBSD, Solaris, HPUX 11, MacOS X, and Cygwin. SkunkWeb includes services to provide, among other things, url rewriting, database connection caching, product distribution, remote component calls, usertracking, authorization, and persistent cgi. It can be used with its builtin standalone web server, with apache using the mod_skunkweb module, or with apache or another web server using a scgi, fastcgi, or cgi connector. SkunkWeb was created by Drew Csillag, and is maintained by him and me (Jacob Smullyan). What Is New ----------- This release features many performance and feature enhancements, including: * Configuration variable lookups are now *much* faster. * swpython (a Python interpreter which loads the SkunkWeb environment) can now be used in shebangs for shell scripts. * now works on HPUX 11. * many enhancements to the standalone web server (httpd service), including support for byte-range requests, Etag headers and gzip compression. * works with Python 2.3. Resources --------- Latest release: http://prdownloads.sourceforge.net/skunkweb/skunkweb-3.4b3.tar.gz Home page: http://skunkweb.sourceforge.net/ Sourceforge project page: http://sourceforge.net/projects/skunkweb/ Online documentation: http://skunkweb.sourceforge.net/docs.html Mailing list: http://sourceforge.net/mail/?group_id=32756 Two recent articles about SkunkWeb (by JS): http://opensourcedigest.com/ Cheers, Jacob Smullyan

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ANN: ElementTree 1.1
by Fredrik Lundh 13 May '03

13 May '03

The Element type is a simple but flexible container object, designed to store hierarchical data structures, such as simplified XML infosets, in memory. The ElementTree toolkit contains an Element implementation in Python, and code to read XML and HTML files into trees of Element objects, and write them out as XML. You can get the ElementTree toolkit from: http://effbot.org/downloads#elementtree Changes in 1.1 include XML literal factory, a self-contained ElementTree module, use ASCII as default encoding, various minor speed and memory optimizations, etc. See the README file for details: http://effbot.org/downloads/index.cgi/elementtree-1.1-20030511.zip/README Brief documentation and some code samples (including an XML-RPC unmarshaller in 16 lines) are available from: http://effbot.org/zone/element-index.htm For more background, see Uche Ogbuji's xml.com article: "Simple XML Processing With elementtree" http://www.xml.com/pub/a/2003/02/12/py-xml.html enjoy /F

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ANN: BayPIGgies mtg Wed May 14, 7:30pm
by Danny Yoo 13 May '03

13 May '03

BayPIGgies: Silicon Valley - San Francisco Bay Area Python Users's Group When: May 14 @ 7:30pm Where: Carnegie Institute of Washington at Stanford University, Palo Alto, CA Agenda: Compedium of talks from PyCon 2003 Speaker: Wesley Chun We will give a high-level overview of some of the talks which were given at the PyCon 2003 Python Community Conference which happened at the end of March in Washington, DC. For more information and directions, see: http://www.baypiggies.net/

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ANN: Leo 3.11.1 outlining editor
by Edward K. Ream 13 May '03

13 May '03

leo.py 3.11.1 is now available at: http://sourceforge.net/projects/leo/ This version fixes two bugs found in the recent 3.11 version: - Leo had startup problems on some Linux systems. - Creating clones by control dragging did not always work. This bug has existed in Leo for a long time. What is Leo? ------------ - A programmer's editor, an outlining editor and a flexible browser. - A literate programming tool, compatible with noweb and CWEB. - A data organizer and project manager. Leo provides multiple views of projects within a single outline. - Fully scriptable using Python. Leo saves its files in XML format. - Portable. leo.py is 100% pure Python. - Open Software, distributed under the Python License. leo.py requires Python 2.1 or above and tcl/tk 8.3 or above. leo.py works on Linux, Windows and MacOs X Jaguar. Links: ------ Leo: http://webpages.charter.net/edreamleo/front.html Home: http://sourceforge.net/projects/leo/ Download: http://sourceforge.net/project/showfiles.php?group_id=3458 CVS: http://sourceforge.net/cvs/?group_id=3458 Edward K. Ream -------------------------------------------------------------------- Edward K. Ream email: edreamleo(a)charter.net Leo: Literate Editor with Outlines Leo: http://webpages.charter.net/edreamleo/front.html --------------------------------------------------------------------

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Python-announce-list May 2003