Mailman 3 September 2002 - Python-announce-list

[ANN] PyQuante 1.0.3 is available
by Rick Muller 09 Sep '02

09 Sep '02

PyQuante is a suite of programs for writing quantum chemistry software. The program is written in the Python programming language, but has many "rate-determining" modules also written in C for speed. The resulting code is not nearly as fast as Jaguar, Gaussian, or GAMESS, but the resulting code is much easier to understand and modify. The goal of this software is not necessarily to provide a working quantum chemistry program (although it will hopefully do that), but rather to provide a well-engineered set of tools so that scientists can construct their own quantum chemistry programs without going through the tedium of having to write everything. The program is released under the GNU General Public License and is thus freeware. PyQuante can be downloaded from http://pyquante.sourceforge.net. People can subscribe to the pyquante-users mailing list at http://lists.sourceforge.net/lists/listinfo/pyquante-users Here is an example of what the closed-shell Hartree-Fock scripts look like: (best viewed in a fixed-width font...) def rhf(atomlist): "General wrapper for restricted closed-shell hartree fock" from basis_631ss import basis bfs = getbasis(atomlist,basis) S,h = get1ints(bfs,atomlist) Ints = get2ints(bfs) energy = scf(atomlist,S,h,Ints) return energy def scf(atomlist,S,h,Ints,charge=0,ConvCriteria=0.0001,MaxIter=20): "Run the self-consistent field optimization of the wave function" evecs = get_guess(h,S) nel = get_nel_from_atomlist(atomlist,charge) nclosed,nopen = divmod(nel,2) enuke = get_enuke_from_atomlist(atomlist) print "nocc, enuke: ",nocc,enuke eold = 0. for i in range(MaxIter): D = mkdens(evecs,0,nocc) G = get2JmK(Ints,D) F = h+G evals,evecs = GHeigenvectors(F,S) energy = get_energy(h,F,D,enuke) print energy if abs(energy-eold) < ConvCriteria: break eold = energy return energy Rick

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[ANN] pyPgSQL 2.2 released
by Gerhard Häring 08 Sep '02

08 Sep '02

Announce: pyPgSQL - Version 2.2 is released. =========================================================================== pyPgSQL v2.2 has been released. It is a bug fix release to version 2.1. It is available at http://pypgsql.sourceforge.net. pyPgSQL is a package of two (2) modules that provide a Python DB-API 2.0 compliant interface to PostgreSQL databases. The first module, libpq, exports the PostgreSQL C API to Python. This module is written in C and can be compiled into Python or can be dynamically loaded on demand. The second module, PgSQL, provides the DB-API 2.0 compliant interface and support for various PostgreSQL data types, such as INT8, NUMERIC, MONEY, BOOL, ARRAYS, etc. This module is written in Python and works with PostgreSQL 7.0 or later and Python 2.0 or later. Note: It is highly recommended that you use PostgreSQL 7.1 or later and Python 2.1 or later. PostgreSQL is a sophisticated Object-Relational DBMS, supporting almost all SQL constructs, including sub-selects, transactions, and user-defined types and functions. It is the most advanced open-source database available any- where More information about PostgreSQL can be found at the PostgreSQL home page at http://www.postgresql.org. Python is an interpreted, interactive, object-oriented programming lang- uage. It combines remarkable power with very clear syntax. It has mod- ules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems (X11, Motif, Tk, Mac, MFC). New builtin modules are easily written in C or C++. Python is also usable as an exten- sion language for applications that need a programmable interface. Python is copyrighted but freely usable and distributable, even for commercial use. More information about Python can be found on the Python home page at http://www.python.org. --------------------------------------------------------------------------- ChangeLog: =========================================================================== Changes since pyPgSQL Version 2.1 ================================= The following source code files were added to Version 2.2 of pyPgSQL: pyPgSQL.spec - RPM spec file, contributed by Sean Reifschneider. Changes to README ----------------- * Added note about case-insensitiveness of column access in PgResultSet. Changes to PgSQL.py ------------------- * Fixed various problems with the PgResultSet: Column (attribute and dictionary) access is now case-insensitive. A __contains__ method was added and the __setattr__ method was fixed. The get method got an optional default value parameter. * Fixed various problems with the PgNumeric type: - Added code to allow a float as an argument to the PgNumeric constructor. - You can now change the precision/scale of a PgNumeric by: a = PgNumeric(pgnumeric, new prec, new scale). This can be used to 'cast' a PgNumeric to the proper precision and scale before storing it in a field. - The arithmatic routines (__add__, __radd__, etc) now ensure that the arguments are properly coerced to the correct types. - Added support for the augmented arithmetic operations (__iadd__, etc). - The math routines would lose precision because the precision/ scale were set to be the same as the first operand. This is no longer the case all precision is retained for the +, -, and * operations. * Fixed problem that occurs when a query on an OID field doesn't return any rows. [Bug #589370]. * Applied patch #569203 and also added __pos__ and __abs__ special methods to PgNumeric. * Ensure proper SQL-quoting of long ints. Changes to PgSQLTestcases.py ---------------------------- * 14 new tests, mostly for PgNumeric and PgResultSet.

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[ANN] New Homepage for the Puffin Automation Framework!
by A. Keyton Weissinger 08 Sep '02

08 Sep '02

The new home page for the Puffin Automation Framework is live! Check it out: http://www.puffinhome.org New documentation. New navigational structure. What are you waiting for, start automating with Puffin today! What is the Puffin Automation Framework? As it's name implies, Puffin allows you to automate "actions." An action, in terms of Puffin, is any "high level" execution item that may require inputs, may produce outputs, and whose results may be validated for success or failure. For example, an action may involve making an HTTP request to a dynamic web page. It may involve grabbing a file's contents or even retrieving a specific email based on a keyword in the subject line. All of these are actions in the sense that they can be automated by Puffin. Puffin will manage all inputs, outputs, and validation for these actions. Many technologies will allow you to do that. So why use Puffin? The real differentiators for Puffin are the following: 1) No programming is required! If there is an action type for your desired task already in the framework (and more are being added all the time), then all you need is XML to configure your action. 2) You can create a transactional grouping of actions that succeed only if every action in the group succeed. 3) You can automate tasks in a connected fashion (use the outputs of action #1 as the inputs of actions #2 and #3). 4) You can automate intelligent repetition of task execution (execute this action until X happens). 5) You can add dependencies to your action execution (execute this action only if this other action's execution is successful). 6) Though programming is not required, you CAN extend any part of the Puffin Automation Framework in your own Python programs. The keyword is "framework." You can build applications that leverage Puffin and all it provides. 7) You get failed task alerting (via email, file logs, etc) and reporting as part of the framework. 8) Workspaces allow you to separate your problem space (places where you would want to automate actions) into discrete chunks with separate configurations and action definitions. Keyton Weissinger keyton(a)puffinhome.org

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DAXFi 0.9
by alberanid＠libero.it 07 Sep '02

07 Sep '02

DAXFi 0.9 is available here: http://daxfi.sourceforge.net/ DAXFi is a Python package that helps configure several different kinds of firewalls in a consistent way. The rules can be described with XML files, XML strings, or generated directly by the code. It comes with a Python package, useful to build other applications aimed to manipulate different firewalls in a homogeneous way and includes some useful example programs. DAXFi is release under the GPL license. In this release: the XML syntax was modified, many bugs were fixed, and the C modules were compiled for the i386, Alpha, PPC, and Sparc64 architectures. Other changes were introduced to improve performance. -- Davide Alberani email: <alberanid(a)libero.it> Personal home page: http://digilander.iol.it/alberanid/ <P><A HREF="http://daxfi.sourceforge.net/">DAXFi 0.9</A> - configure several different kinds of firewalls in a consistent way. (07-Sep-02)

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ANN: PySQLite 0.3.0 Released
by Michael Owens 06 Sep '02

06 Sep '02

NAME: pysqlite - Extension module for SQLite databases. DESCRIPTION: A Python-DB API 2.0 compliant extension module that connects to SQLite databases. SQLite is a powerful, embedded relational database in a compact C library. It supports a large subset of SQL92, multiple tables and indices, transactions, and triggers. It has a simple C/C++ interface requiring only three functions to perform queries. It has ODBC, JDBC, Perl-DBI, PHP, Tcl, Delphi, Ruby, DBExpress, wxWindows, Eiffel, and Lua bindings. Its source code is uncopyrighted and can be used for any purpose. More information can be found at <http://www.hwaci.com/sw/sqlite/index.html>. USAGE: import sqlite conn = sqlite.connect("db") cursor = conn.cursor() SQL = """ select category, family, genus, species from calflora order by genus, species limit 10""" cursor.execute(SQL) for col in cursor.description: print "\t %12s - %3s bytes" % (col[0], repr(col[3])) row = cursor.fetchone() while row != None: print "%14s, %15s, %19s, %8s, %25s" % tuple(row) row = cursor.fetchone() SQL = "insert into calflora (family,genus,species) values(%s,%s,%s)" cursor.execute(SQL, ('greenus', 'weedus', 'maximus')) conn.close() HOMEPAGE: <http://pysqlite.sourceforge.net> DOWNLOAD: Linux(source) and Windows (binary) downloads are available at <http://www.sourceforge.net/projects/pysqlite> AUTHORS: Gerhard Häring <haering_postgresql(a)gmx.de> Michael Owens <mike(a)mikesclutter.com> William Trenker <wtrenker(a)shaw.ca> LICENSE: Python NOTES: PySQLite has been tested on FreeBSD, Linux, and Windows with both Python 2.1 and 2.2. The latest versions of SQLite (v. 2.6 and greater) are recommended. Version 0.3.0 fixed a lot of bugs, while also adding new features. Users of PySQLite are recommended to upgrade. The following are some of the changes and enhancements since the last release: - Squashed a few memory leaks. - Exposed the sqlite_exec, sqlite_last_insert_rowid and sqlite_changes functions of SQLite to Python as methods of the connection object. - Add support for Date types, if mxDateTime is available. - Support for optional DB-API extensions from PEP 0249 - Added files for creating a PySQLite Debian package. - setup.py: - Added Cygwin as platform that's supported by default - Added third example: program to dump a table in XML format. - Use bool type and custom bool converter for boolean fields. - Set cursor.rowcount appropriately after DML (insert/update/delete) statements. - Fixed a bug with the SQL-quoting of longs. - Inline documentation improvement. - Change invocation of ReferenceError to work with Python 2.1 - (really) implemented weak references from cursors to connections - Added new test suite. - Adapted test for threadsafety attribute. - Added checks with user-defined float and string functions. - Removed Connection.begin(). Transactions are now started implicitely. - Use DB-API quoting instead of manual Python quoting. - Use string methods instead of the string module. - Added checks for functions/aggreagates that raise exceptions or return None (NULL). - Added tests for proper commit/rollback behaviour. Added tests for autocommit feature. - Implemented autocommit feature. Renamed the parameter of Connection.__init__ from "filename" to "db". Commit and rollback now check if the connection is open at all. Started adapting the weak reference code from pyPgSQL to loosely couple cursors and connections. This is needed when you want to check if there are any open cursors for a given connection, for example. - Simplified version numbers, removed the check for equal version numbers in _sqlite and sqlite. This looked like overhead to me. The version number scheme is now only: major.minor.micro Set threadsafety to level 1. I believe we can guarantee than sharing the module among threads will do no harm. Sharing the connection would.

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ANN: System Modeling Workbench
by Ivan Porres 06 Sep '02

06 Sep '02

The System Modeling Workbench is a collection of tools for editing, storing, analyzing and verifying models. It is based on the OMG MOF and UML standards and it is implemented using the Python programming language. It is still under development, but we think it already contains many interesting ideas. It is distributed under the GNU General Public License and is available from http://www.abo.fi/~iporres/Projects/fog0000000023.html. SMW is built from the following components: - SMW Kernel. It implements a MOF-based metamodel as a collection of Python classes. It supports OCL-like queries, bidirectional associations, well-formed rules and XMI input and output. - Repository. A central repository and version control system for MOF and XMI-based models. - Transformation Framework. A collection of classes for transforming models into other artifacts: code, metrics, test cases, etc... It can also be used to refactor models. - Modeler. A graphical editor. It is still under construction but it already has some cool features. It supports the following profiles: * Plain UML 1.4 as defined in the OMG Standard. (www.omg.org/uml) * Stepwise Feature Introduction for Python Profile. A profile for creating Python programs based on UML 1.4 and the Stepwise Feature Introduction method. * SA/RT. A profile for creating Real-Time Structured Analysis models. The main contact person for the SMW Application is Ivan Porres. Send e-mail to iporres(a)abo.fi or see http://www.abo.fi/~iporres/Projects/fog0000000023.html Ivan

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New `spambayes' project on SourceForge
by barry＠zope.com 05 Sep '02

05 Sep '02

There's been a ton of press about applying Bayesian classifiers to spam detection lately, spurred on by Paul Graham's recent paper "A Plan for Spam" http://www.paulgraham.com/spam.html Tim Peters has done an incredible amount of work on our Python implementation of this idea. Some of the reasons why I think Tim's work is so cool is that he's brought along his deep knowledge of speech recognition's related issues, and his obsessive devotion to reducing the amount of spam I ultimately have to delete <wink>. In order to encourage more participation from the wider open source community, we've moved the code from a backwater of the Python cvs tree to its own project on SourceForge. The hope is that more people will be able to contribute to ideas, testing, and integration of the basic algorithms with other systems such as mail daemons, mailing list managers, and mail clients. The project is called "spambayes" (for lack of creativity on our part :) and is hosted here: http://sf.net/projects/spambayes If you're interested in becoming a developer on the project, let me know. Otherwise you can of course get anonymous checkouts of the code. There are also two mailing lists related to the spambayes project. The first is a general discussion list: http://mail.python.org/mailman-21/listinfo/spambayes and the other is a list for cvs checkin message notices: http://mail.python.org/mailman-21/listinfo/spambayes-checkins Feel free to join those lists (and help be a guinea pig for Mailman 2.1 :). Enjoy, -Barry PS to Python-devers: the code has been removed from nondist/sandbox/spambayes, so you won't be able to hack on it there. Also, please move discussion about this from python-dev(a)python.org to spambayes(a)python.org

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ANNOUNCE: scgi 0.5 released
by Neil Schemenauer 05 Sep '02

05 Sep '02

Version 0.5 of the scgi package is now available from: http://www.mems-exchange.org/software/scgi/ The SCGI protocol is a replacement for the Common Gateway Interface (CGI) protocol. It is a standard for applications to interface with HTTP servers. It is similar to FastCGI but is designed to be easier to implement. Included in this package is mod_scgi, an Apache module that implements the client side of the protocol. There is also a a Python package called scgi which implements the server side of the protocol. Changes in version 0.5 ---------------------- scgi_server.py * Rewrite most of the scgi_server parent code. Drop the table of busy children and the shared pipe between the parent and children. Instead, the children write a byte on the Unix domain pipe when they are ready for a request. In the process, fix a bug that caused the parent to wait until all the children were ready before delegating a request (found by Changjune Kim). mod_scgi.c * Pass REMOTE_USER to SCGI servers (patch from Hamish Lawson). -- Neil Schemenauer <nas(a)mems-exchange.org> | MEMS Exchange Software Engineer | http://www.mems-exchange.org/

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ANN: BayPIGgies mtg Wed 9/11 7:30pm
by wesc＠deirdre.org 05 Sep '02

05 Sep '02

BayPIGgies: Silicon Valley-San Francisco Bay Area Python Users Group Agenda: Using a New MVC Architecture to Create a Pythonic XML-based Web Application Framework When: September 11, 2002 @ 7:30pm Where: Stanford University, Palo Alto, CA Speakers: Paul McGavin, Donovan Preston, Sam Penrose from InterSight We will discuss how we are applying a new Python-based MVC architecture to create an efficient, Pythonic web application framework that separates presentation templates from the Python source code with DOMTemplate. The framework componentizes behavior into reusable objects with DOMWidgets and DOMHandlers. After creating web applications in three separate Python frameworks -- Webware for Python, Zope and Apache/Python cgi -- InterSight decided to create its own MVC framework, based on some of the ideas from IBM and Lutris Enhydra's Barracuda project, to power their automated publishing applications. Their applications enable scalable content: the ability to produce, from a single set of managed data and images, many different marketing communication pieces: press- ready Adobe InDesign and QuarkXPress files, web pages, order sheets, sample stickers, price tags and more. We are actively seeking speakers for BayPIGgies, esp. October 9th! If you would like to give a talk at one of our meetings (any Python- related topic), please contact us! more info including directions: http://www.baypiggies.net hope to see some of you on Wednesday! -wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Core Python Programming", Prentice Hall PTR, © 2001 http://starship.python.net/crew/wesc/cpp/ Silicon Valley-San Francisco Bay Area Python Users Group (BayPIGgies) http://www.baypiggies.net wesley.j.chun :: wesc at deirdre.org cyberweb.consulting : henderson, nv : cyberweb at rocketmail.com http://roadkill.com/~wesc/cyberweb/

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SC-Track Roundup 0.4.4 - an issue tracking system
by Richard Jones 04 Sep '02

04 Sep '02

================================================= SC-Track Roundup 0.4.4 - an issue tracking system ================================================= Note: If you have an existing roundup installation, make a backup of your database. Make sure you read doc/upgrading.txt! This is probably the last 0.4 maintenance release, since I hope to release the first 0.5 beta next week :) Roundup requires python 2.1.1 for correct operation. Support for dumbdbm requires python 2.1.2 or 2.2. 2.1.3 and 2.2.1 are recommended. This is a bugfix release, fixing: . bug in database opening . sf bug #596155: bug with multilink . sf bug #600699: documentation in doc/getting_started.txt . sf bug #600700: doc/upgrading.txt: no info about 0.4.3 . sf bug #603696: Mail followup not inserted . sf bug #603703: way to unassign issues Source and documentation is available at the website: http://roundup.sourceforge.net/ Release Info (via download page): http://sourceforge.net/projects/roundup Mailing lists - the place to ask questions: http://sourceforge.net/mail/?group_id=31577 About Roundup ============= Roundup is a simple-to-use and -install issue-tracking system with command-line, web and e-mail interfaces. It is based on the winning design from Ka-Ping Yee in the Software Carpentry "Track" design competition. Note: Ping is not responsible for this project. The contact for this project is richard(a)users.sourceforge.net. Roundup manages a number of issues (with flexible properties such as "description", "priority", and so on) and provides the ability to: (a) submit new issues, (b) find and edit existing issues, and (c) discuss issues with other participants. The system will facilitate communication among the participants by managing discussions and notifying interested parties when issues are edited. One of the major design goals for Roundup that it be simple to get going. Roundup is therefore usable "out of the box" with any python 2.0+ installation. It doesn't even need to be "installed" to be operational, though a disutils-based install script is provided. It comes with two issue tracker templates and three database back-ends.

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