Mailman 3 October 2002 - Python-announce-list

ANN: Sydney Australia Python Interest Group: Monday 21st October 2002
by Mary Gardiner 10 Oct '02

10 Oct '02

The Sydney Australia Python Interest Group meeting: Monday the 21st October, 7pm - 9pm University of Technology Sydney, Australia, Broadway campus. This month's meeting is being held in the Fairfax Building of UTS Broadway, room 2.440 (level 2, solaris lab 10). This month, Pete Hardy is talking about his Python curses interface to the Julie Jukebox[0]. The Sydney PIG's webpage can be found at http://pig.slug.org.au/ [0] http://www.cse.unsw.edu.au/~cgray/julie/ ---- Sydney Python Interest Group meetings are announced on: * comp.lang.python.announce and python-announce-list(a)python.org[0] * the Australian 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.

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ANN: 'mailfmt' 1.3
by Tim Daneliuk 09 Oct '02

09 Oct '02

'mailfmt' is a Unix and Win32 tool for reformatting news and mail messages. It removes leading quotations strings (most often the '>' character, but this is user selectable from the command line) and wraps lines to a user specified width. This allows news or mail messages which have been extensively forwarded and/or quoted to be easily reformat- ted for ease of reading. On Unix systems, 'mailfmt' reads from stdin and writes to stdout. On Win32 systems, 'mailfmt' reads from the clipboard and then writes the results to the clipboard. This is really handy if your are running a GUI mail client. You cut the desired text (thereby placing it on the clipboard). Then you run 'mailfmt' - this is best done with a keyboard shortcut - Then paste back to your mail client and, voila!, your text has been reformatted. On Win32 systems, the input and output can be reassigned to stdin and stdout using command line options. 'mailfmt' can be found at: http://www.tundraware.com/Software/mailfmt/ A FreeBSD port has also been submitted. -- ------------------------------------------------------------------------------ Tim Daneliuk tundra(a)tundraware.com

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Release: IndexedCatalog 0.3
by Christian Reis 09 Oct '02

09 Oct '02

ANNOUNCE: Released IndexedCatalog 0.3 Async Open Source releases today the third public version of IndexedCatalog. IndexedCatalog is an extension to the Zope Object Database (ZODB) that makes object retrieval easier and faster, by indexing all fields by type (string/integer/float) and providing a simple query language. http://www.async.com.br/projects/IndexedCatalog/ The next version will implement a real query language and parser; we got tired of hacking on the current version and we need some extra functionality that just couldn't be cut. The new version will be cooking in CVS hopefully by tomorrow morning, and we'll be testing it through the week. The next version will accompany some real documentation, too. * Changes - Support for creating objects outside of the catalog was added; it is no longer required to use catalog.new(). - catalog.insert() was added. - Boolean operations now work as they should. - Many new tests were added in the test suite. - Many random bugfixes were made. - Case insensitive substring searching (largely untested :-) A blurb about IndexedCatalog follows. --- blurb ------------------------------------------------------------- * Overview IndexedCatalog is an extension to the Zope Object Database (ZODB) developed by Johan Dahlin at Async Open Source (http://www.async.com.br/) that provides indexing and allows queries for objects based on attributes. This is accomplished by indexing all fields by type (string/integer/float) and by implementing a simple query language. IndexedCatalog is licensed under the Lesser GNU Public License (LGPL). * Features - Provides a Catalog class that stores objects and offers a query interface. - Provides Indexes for Strings, Floats, Integers and Instances. - Requires very little change to objects for catalogs and indexes to work: basically, add some special attributes to the Classes, and use catalog.insert() to add the instances to the catalogs. - Supports composite objects, initializing and indexing sub-objects automatically. - Supports queries by type, and allows querying sub-object or referenced object attribute values. - Allows ordering query results by field, both ascending and descending. - Is 100% pure python, and by using Distutils requires miminal effort to install. * Feedback We really would appreciate feedback on a few things: - Object lifecycle (Class() and catalog.insert() vs. Catalog.new()) - The efficiency of the indexing and query algorithms - The query language - All flam^Wcomments are appreciated; don't hesitate to post your opinion. * Download You can download IndexedCatalog from http://www.async.com.br/projects/IndexedCatalog/ * Installing Using standard python distutils: python setup.py install Or just set PYTHONPATH to the directory you unpacked IndexedCatalog in. * Reporting bugs Report bugs, feature requests and all other things related to IndexedCatalog at http://bugs.async.com.br/enter_bug.cgi?product=IndexedCatalog * Contact Johan Dahlin <jdahlin(a)telia.com>, Christian Reis <kiko(a)async.com.br> * About Async Async Open Source is a company devoted to developing custom applications based on open source software, and providing support for other existing open source products. We are active in the OSS community, supporting (and employing) project maintainers, encouraging release of software as open source, and promoting reuse of existing open source products. Async is located in São Carlos, SP, Brazil, and online at http://www.async.com.br/ Take care, -- Christian Reis, Senior Engineer, Async Open Source, Brazil. http://async.com.br/~kiko/ | [+55 16] 261 2331 | NMFL Take care,

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[PEP] number accuracy
by Luke Kenneth Casson Leighton 09 Oct '02

09 Oct '02

number accuracy, by Luke Kenneth Casson Leighton <lkcl(a)samba-tng.org> abstract -------- python classes that support number types have an automatic cast mechanism (hierarchical). unfortunately, the existing mechanism can only really cope with builtin types. any user-defined number types cannot be type-cast to or from any other user-defined number types because every single other class, including the builtin number types, need to know about every single other number type. the proposal is therefore to provide a means by which the accuracy of numbers may be determined independently. number ranking -------------- The Plan is to provide a function that returns a tuple or a list of tuples indicating the accuracy of the numerical class's resolution. then, type-casting may occur by first checking the length of the list and further by checking the tuples in the lists. the tuple consists of: - 0 if the representation can do positive numbers, 1 if it can do positive and negative - the number of binary digits (ln2 of the max range) in the mantissa - optionally the number of digits in the exponent example: class UserLong: def __accuracy__(self): return (1, 1000000000000000L) # presumed infinite! class UserIEEEFloat: def __accuracy__(self): return (1, 32, 12) # does up to 32-bit mantissa, 12-bit exponent when complex numbers are involved, you want to do this: class UserComples: def __accuracy__(self): return [(1, 32, 12), (1, 32, 12)] which indicates that both the real and imaginary components of the 2-dimensional number space are capable of supporting floating point e.g. "0.95829-32.59j" usage ----- a simple test determines whether numbers can be typecast: if num1.__accuracy__() > num2.__accuracy(): return num1 else: return num2 type-casting ------------ *thinks*... i believe... also... that... the same principle may be applied to actually performing a typecast... def __mantissa__(self, dimension=0): def __exponent__(self, dimension=0): as long as these two functions return numbers of built-in types (int and long, basically) then it will be possible to type-cast between any user-defined numerical types. -- ---------------------------------------------------------- this message is private, confidential, and is intented for the specified recipients only. if you received in error, altered, deleted, modified, destroyed or interfered with the contents of this message, in whole or in part, please inform the sender (that's me), immediately. if you, the recipient, reply to this message, and do not then receive a response, please consider your reply to have been lost or deliberately destroyed: i *always* acknowledge personal email received. please therefore take appropriate action and use appropriate protocols to ensure effective communication. thank you.

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ANN: Leo 3.7 outlining editor
by Edward K. Ream 09 Oct '02

09 Oct '02

leo.py 3.7 is now available at: http://sourceforge.net/projects/leo/ leo.py requires Python 2.1 and tcl/tk 8.3 or above. The highlights of 3.7: ---------------------- - Now works with Python 2.1. Previous versions required Python 2.2. - Many new user options, including user-definable shortcuts for all commands and colors for all parts of Leo's windows. As a result, it is now possible to use arrow keys as you desire. - Minimal support for Unicode. Better support is coming. - Improved handling of relative path names. - The @first directive allows lines to precede the opening @+leo sentinel line. - The @last directive allows lines to follow the closing @-leo sentinel line. - Better support for Perl+pod. - Leo now ends all lines with '\n' regardless of platform. - Leo is now compatible with Python 2.1. - Simplified sentinels reduce spurious CVS diffs. - Many other minor improvements and bug fixes. 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. Links: ------ Leo: http://personalpages.tds.net/~edream/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 -------------------------------------------------------------------- Edward K. Ream email: edream(a)tds.net Leo: Literate Editor with Outlines Leo: http://personalpages.tds.net/~edream/front.html --------------------------------------------------------------------

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Tim Peters' FixedPoint with settable rounding
by Doug Fort 08 Oct '02

08 Oct '02

FixedPoint release 0.1.0 http://fixedpoint.sourceforge.net This is the second SourceForge release for Tim Peters' FixedPoint math object. What's New ========== The main new feature is settable rounding. You can select which rounding algorithm FixedPoint uses by assigning a bound function to FixedPoint.RoundingAlgorithm. Take a look at examples/roundingsample.py to see various forms of rounding. Joe has redone the LaTex documentation to add an excellent description of rounding. There's a link to the HTML rendering at the project website. We also modernized the code a little. - FixedPoint now derives from 'object', making it a 'new' class. - FixedPoint's member variables are now in __slots__. - precision is now a property, allowing you to uses expression like f.precision -= 1 (note that get_precision/set_precision are unchanged, so this shouldn't break anything) What's Next =========== This release concludes our planned changes to FixedPoint. We're going to sit back and watch for bug reports and feature requests, but we won't mess with the code anymore without provocation. You can enter bug reports and feature requests at the project website: http://fixedpoint.sourceforge.net Contents ======== README - this readme file fixedpoint.py - the FixedPoint module itself libfixedpoint.tex - LaTex documentation test_fixedpoint.py - unit tests for regression testing examples - a folder of sample code containing: FPBench.py - a benchmark program, timeing various FixedPoint operations roundingsample.py - a small demo, showing what can be done with rounding -- Doug Fort, Programmer http:/www.dougfort.net

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ANNOUNCE: Quixote 0.5.1 released
by Greg Ward 08 Oct '02

08 Oct '02

Quixote 0.5.1 is now available for download from: http://www.mems-exchange.org/software/quixote/ Quixote is yet another framework for developing Web applications in Python. The design goals were: 1) To allow easy development of Web applications where the accent is more on complicated programming logic than complicated templating. 2) To make the templating language as similar to Python as possible, in both syntax and semantics. The aim is to make as many of the skills and structural techniques used in writing regular Python code applicable to Web applications built using Quixote. 3) No magic. When it's not obvious what to do in a certain case, Quixote refuses to guess. If you view a web site as a program, and web pages as subroutines, Quixote just might be the tool for you. If you view a web site as a graphic design showcase, and each web page as an individual work of art, Quixote is probably not what you're looking for. Quixote was primarily written by Andrew Kuchling, Neil Schemenauer, and Greg Ward: {amk,nas,gward}(a)mems-exchange.org. The Quixote documentation is available online: http://www.mems-exchange.org/software/quixote/doc/ Support for Quixote is available on the quixote-users(a)mems-exchange.org mailing list: http://mail.mems-exchange.org/mailman/listinfo/quixote-users CHANGES in Quixote 0.5.1 ------------------------ * (incompatible change for anyone doing HTTP upload with Quixote) Improved support for HTTP upload requests: any HTTP request with a Content-Type of "multipart/form-data" -- which is generally only used for uploads -- is now represented by HTTPUploadRequest, a subclass of HTTPRequest, and the uploaded files themselves are represented by Upload objects. See doc/upload.txt for details. * (possible incompatible changes for anyone subclassing Publisher, or using it for custom purposes) Various rearrangements and refactoring in the Publisher class. Added create_request() method, which takes responsibility for creating the HTTPRequest (or HTTPUploadRequest) object away from parse_request(). As a consequence, the signature of parse_request() has changed. Added process_request() method. Changed publish() so it catches exceptions coming from either parse_request() or process_request(). Consult the source code (publish.py) for details. * A new subpackage, quixote.server, is intended for code that publishes a Quixote application through HTTP, making it possible to run Quixote applications without having to configure Apache or some other full-blown Web server. Right now there's only an implementation on top of Medusa; contributions of support for Python's BaseHTTPServer, Twisted, or other frameworks would be welcome. * Modified SessionManager.maintain_session() so it explicitly removes a session if that session used to have useful info (ie. exists in the session manager), but no longer does (patch by Jon Corbet). * Make the PTL compiler a bit smarter about recognizing "template" lines; PTL code should now be able to use 'template' as an identifier, which is handy when converting existing Python code to PTL. * Replaced HTTPRequest.redirect() with a cleaner, more general version supplied by Andreas Kostyrka <andreas(a)kostyrka.priv.at>. Redirects to fully relative URLs (no leading slash) now work. * Added support for putting bits of JavaScript into HTML form documents: added HTTPResponse.add_javascript() to collect snippts of JavaScript code, and Form._render_javascript() to emit them as part of the HTML document. * Added global convenience functions get_path() and redirect(). * Change Publisher so it never modifies SCRIPT_NAME or PATH_INFO. * Fixed bug in quixote.sendmail._add_recip_headers(): it crashed if passed an empty list. * Factor out get_action_url() method in Form class. * Add the HTML version of the documentation to the source release. -- Greg Ward - software developer gward(a)mems-exchange.org MEMS Exchange http://www.mems-exchange.org

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RELEASED: Python 2.2.2b1
by Guido van Rossum 08 Oct '02

08 Oct '02

I'm happy to announce the release of Python 2.2.2 beta 1. Python 2.2.2 will be a fully backwards compatible bugfix release for Python 2.2.1. I'm shooting for a short beta test cycle: hopefully I can make the final 2.2.2 release next week with minimal changes from 2.2.2b1. Python 2.2.2 has a large number of bug fixes in all areas of the interpreter and the library; for a full account see the release notes, available via the link below. The new release is available here: http://www.python.org/2.2.2/ As usual, a Windows installer and a Unix/Linux source tarball are made available, as well as tarballs of the documentation in various forms. At the moment, no Mac version is available, though I expect that Jack Jansen will start working on one soon. Likewise, no Linux RPMs are available; I expect that Sean Reifschneider will prepare Linux RPMs for 2.2.2 final. I'm especially grateful to Michael Hudson, Raymond Hettinger and Neal Norwitz for their hard work on backporting the large volume of patches from Python 2.3. Without them this release would not have been possible. --Guido van Rossum (home page: http://www.python.org/~guido/)

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ANN: SV/SF Python User Group mtg Wed 10/9 7:30pm (fwd)
by Wesley Chun 07 Oct '02

07 Oct '02

BayPIGgies: Silicon Valley-San Francisco Bay Area Python Users Group Agenda: Python at the O'Reilly Open Source Convention When: October 9, 2002 @ 7:30pm Where: Stanford University, Palo Alto, CA Speaker: Wesley Chun Wesley will give a run down on some of the key talks at this year's O'Reilly Open Source Convention which happened late July in case you were not able to go. Some of the talks to be summarized include: - Guido's Python State of the Union [with updates on 2.2 and 2.3] - Guido's talk on what he feels are regrets in Python - the Bioinformatics Keynotes from Ewan Birney and Jim Kent - the PythonCard talk (HyperCard-motivated wxPython GUI builder, a la Glade for pyGTK) by Kevin Altis and Patrick O'Brien - Jason Asbahr's talk on using Python for developing game logic, not to mention his ports of Python to the Sony PlayStation 2 and Nintendo Gamecube! Download links: - Guido's essays and presentations http://python.org/doc/essays/ppt/ - various O'Reilly OSCON 2002 presentations http://conferences.oreillynet.com/pub/w/15/presentations.html We are actively seeking speakers for BayPIGgies, so 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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pyrad 0.2 - RADIUS client
by Wichert Akkerman 07 Oct '02

07 Oct '02

pyrad is an implementation of a RADIUS client as described in RFC2865. It takes care of all the details like building RADIUS packets, sending them and decoding responses. (RADIUS is a common protocol used for authentication, authorisation and accounting for remote access (and similar) services). Changes since previous release ------------------------------ * Use proper exceptions * Encode and decode vendor attributes * Dictionary can parse vendor dictionaries * Dictionary can handle attribute values * Enhance most constructors; they now take extra optional parameters with initialisation info. * No longer use obsolete python interfaces like whrandom * Use correct homepage address in announcement and readme (doh) Example ------- Here is an example of doing a authentication request: from pyrad.client import Client from pyrad.dictionary import Dictionary srv=Client(server="radius.my.domain", secret="s3cr3t", dict=dictionary.Dictionary("dicts/dictionary", "dicts/dictionary.acc")) req=srv.CreatePacket(code=pyrad.client.AccessRequest, User_Name="wichert", NAS_Identifier="localhost") req["User-Password"]=req.PwCrypt("password") reply=srv.SendPacket(req) if reply.code==pyrad.client.AccessAccept: print "access accepted" else: print "access denied" print "Attributes returned by server:" for i in reply.keys(): print "%s: %s" % (i, reply[i]) Requirements ------------ pyrad requires Python 2.0 or later. Author, copyright, availability ------------------------------- pyrad was written by Wichert Akkerman <wichert(a)deephackmode.org> The current version and documentation can be found at its homepage: http://www.wiggy.net/code/pyrad.xhtml Copyright 2002 Wichert Akkerman. All rights reserved. pyrad is distributed under the BSD license. Please see the source archive for the full license text. -- _________________________________________________________________ /wichert(a)wiggy.net This space intentionally left occupied \ | wichert(a)deephackmode.org http://www.wiggy.net/ | | 1024D/2FA3BC2D 576E 100B 518D 2F16 36B0 2805 3CB8 9250 2FA3 BC2D |

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