Python-announce-list April 2004

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60 participants
81 discussions

ANN: easylog
by JimJJewett＠yahoo.com 05 Apr '04

05 Apr '04

The standard library logging package is very powerful, but does not scale *down* well. Any configuration -- even just saving messages to a file rather than the console -- requires a fair amount of setup or glue code. easylog wraps the standard library, to minimize the amount of logging-specific code in your own script or application. >>> from easylog import critical, error, warning, debug, info >>> debug("getFoo requesting %d %s", 42, "answers") >>> error("getFoo says %d of those %s are lousy!", 19, "answers") ERROR:easylog.easylog:getFoo says 19 of those answers are lousy! Both messages are captured in the logfile, but only the error is shown onscreen. If you want to change the logfile name/which messages are captured/the output format, etc, you can do that with a single call. Alpha version 0.2.0 is available under the Python Software Foundation License at http://sourceforge.net/projects/easylog/ Please send comments to JimJJewett(a)yahoo.com. <P><A HREF="http://sourceforge.net/projects/easylog/">easylog 0.2.0</A> works with the standard logging package to minimize logging-specific code in your application.. (05-04-04)

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Announcement - PyMatrix
by Colin J. Williams 05 Apr '04

05 Apr '04

PyMatrix is a package, based on numarray, which provides matrix arithmetic for the Python user. This is version 0.0.0b Pre-Alpha release. Thanks to those who commented on the initial release in November 2003. The package is available for download from: http://www3.sympatico.ca/cjw/PyMatrix. I would appreciate comments on the current functionality and suggestions as to other capabilities which could usefully be integrated into the package. Prerequisite: numarray 0.9, which is available from: http://sourceforge.net/project/showfiles.php?group_id=1369 The package has been developed under Windows. Reports of usage under Linux would be of particular interest. Colin W.

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<ANNOUNCE> Python Utils - dataenc.py NEW
by fuzzyman＠voidspace.org.uk 05 Apr '04

05 Apr '04

http://www.voidspace.org.uk/atlantibots/pythonutils.html A python resource page with various python modules available. **NEW** dataenc.py This is a set of functions that provide a binary to ASCII encoding (based on a user definable TABLE) and binary interleaving which can be used for combining files or time/datestamping data. The purpose of this is that an encrypted password can be timestamped and then included as ASCII in a hidden form field - in the HTML output of a CGI. This gives a convenient way of providing a 'user login' with a CGI - but the password (or it's SHA hash) that is hidden in the HTML is 'time stamped' so that even if is extracted from the HTML it can't be used once it has expired. Conceivably, the binary interweave functions could be used for combining, 'watermarking' or timestamping any data. The binary to ascii function is no 'better' than the binascii module - but the mapping is user definable. It can be used for storing *any* binary data as ascii - e.g. an SHA hash in a ConfigObj ! Other Modules on this Page : ConfigObj 2 - simple config file parser that behaves like a dictionary. listparser - parses strings into lists (including nested lists) dateutils - a set of functions for handling and working out dates csv_s - a very simple module for reading/writing/comparing CSV files. Nanagram - not really a module, a Tkinter desktop application for finding anagrams. Make silly anagrams of your friends names ! Great fun. Also available as a CGI for including on your own website. Guestbook - again, not really a module. The Voidspace Python Guestbook. Uses HTML templates for simple integration into your own site. ConfigObj 2 ConfigObj is a lightweight and easy to use config file parser. It allows you and your users to write simple text config files - and for you to easily load, parse, change and save them. In practise, you hand ConfigObj a filename and it parses the values from keywords in the file. For adding, retreiving or changing values/keywords it then behaves liek a normal python dictionary. You can then write the edited data back to file if you need to with a simple configobj.write() command. You can give it a list of keywords to parse - or simply have it find all the keywords in the file. Comments inline with keywords are preserved. listparser Not only this, but each value can either be a single value *or* a list of values. This now includes lists of lists !! In other words each element of a list, can itself be a list. This is implemented using listparser - a simple module with functions for reading lists from a string and also turning lists back into strings. A useful way of storing data in a readable format. This module is available seperately if you want but included in the configobj2 zip. Dateutils This is a set of functions for dealing with dates - written for a little tool called 'Victory Days'. They are particularly useful for dealing with appointments - e.g. the second Tuesday in March etc... The functions will tell you what day of the week a date is, work out the 'Julian day number' of a date is, correctly add numbers of days (weeks, months etc) to a date and tell you the number of days between a date, format a datestring etc. Full correction for leap years and much more. csv_s A very simple module for reading/writing/comparing CSVs. For use where you have a version of python prior to 2.3 or don't need hte compelxity of the CSV module. Also a couple of other goodies that maybe of interest - particularly for new programmers. For a comprehensive set of python links see - YAPLP (yet anothe python links page) : http://www.voidspace.org.uk/coollinks/python_links.shtml Regards, Fuzzyman fuzzyman AT voidspace DOT org DOT uk

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Vancouver Python/Zope Meeting on Tuesday
by Paul Prescod 04 Apr '04

04 Apr '04

7:00, Tuesday April 6th at ActiveState (6:45 for presenters) Proposed Topics: * report from Pycon * what will be the main features of Python 2.4? * upcoming meetings. * planning for a two-day workshop at the beginning of August. * food and drinks at a local pub Paul Prescod

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ANN: SimPy 1.4.1 discrete event simulation package
by Klaus Muller 04 Apr '04

04 Apr '04

It is our pleasure to announce the release of SimPy 1.4.1, a maintenance release of SimPy 1.4. It can be downloaded via the SimPy homepage http://simpy.sourceforge.net. What is new? ------------ This release makes no changes to the SimPy API. It repairs two bugs and improves on the unit test coverage: Resource -------- - To repair a bug with monitoring the activeQ of a Resource instance, method _release in class Resource has been changed in modules Simulation.py, SimulationRT.py, SimulationTrace.py and SimulationStep.py testSimpy.py ------------ - This unit test module has been enhanced with a unit test for monitored Resources. cellphone.py ------------ - This example had a programming error and has been corrected. File names ---------- - All file names in the source distributions have been made “Unix-friendly” by changing file names containing blanks. What is SimPy? -------------- SimPy is a process-based discrete-event simulation language package implemented in Python and released under the GNU GPL. It provides the modeller with building blocks for simulation models. These include processes, for active components like customers, messages, and vehicles, and resources, for passive components that form limited capacity congestion points like servers, checkout counters, and tunnels. It also provides monitor variables to aid in gathering statistics. SimPy has a Tkinter-based GUI and a plotting package. SimPy comes with extensive reference and tutorial documentation. SimPy is in use in universities, research institutes and industry. Klaus Muller (kgmuller at users.sourceforge.net) Tony Vignaux (vignaux at users.sourceforge.net)

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Two articles on new-style objects
by Shalabh Chaturvedi 03 Apr '04

03 Apr '04

I would like to announce that two articles explaining in detail the working of new-style (v2.2 and up) objects have been released as final versions. 1. Python Types and Objects http://www.cafepy.com/articles/python_types_and_objects/ Explains different Python new-style objects, starting with <type 'type'> and <type 'object'>, and going all the way to user defined classes and instances. The system described is sometimes called the Python type system, or the object model. 2. Python Attributes and Methods http://www.cafepy.com/articles/python_attributes_and_methods/ Explains the mechanics of attribute access, how functions become methods, descriptors, properties, MRO and the like for new-style Python objects. Any and all feedback is appreciated, and can be sent to shalabh(a)cafepy.com. -- Shalabh Chaturvedi

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ANNOUNCE: Gnome-Python 2.0.2
by Johan Dahlin 03 Apr '04

03 Apr '04

Gnome-Python 2.0.2 is now available at: http://ftp.gnome.org/pub/GNOME/sources/gnome-python/2.0/ Gnome-Python provides bindings for the Gnome 2.x development platform libraries. It builds on top of PyGTK, and includes bindings for the following GNOME libraries: * the GConf configuration database * the Bonobo component system * the Gnome-VFS file access library * support for writing panel applets and Nautilus views * the GtkHTML2 widget. * the Gnome-Print print libraries. Gnome-Python requires PyGTK, PyORBit, Python >= 2.2 and the Gnome 2.x development platform to build. PyGtk, Python and Gnome is usually included in your distribution, if not: PyGTK can be found on http://www.pygtk.org/ Python can be found on http://www.python.org Gnome libraries can be found on http://www.gnome.org Changes since 2.0.1: The only change since 2.0.1 is a small build fix that makes it possible to build the vfs bindings again. (bug 138556) Questions about Gnome-Python can be directed to the PyGTK list: http://www.daa.com.au/mailman/listinfo/pygtk Bug reports should be filed at the Gnome bug tracker: http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-python -- Johan Dahlin <johan(a)gnome.org>

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TNC 1.2: a non-linear, bounds constrained optimizer
by Jean-Sebastien Roy 03 Apr '04

03 Apr '04

I would like to announce the release of TNC v 1.2. TNC is a non-linear, bound constrained optimizer written in C with a Python interface. You can get it at: http://www.jeannot.org/~js/code/tnc-1.2.tgz The latest version is always available at: http://www.jeannot.org/~js/code/index.en.html An example and a few test cases are provided. Thanks, Jean-Sebastien Example use: import tnc # A function to minimize # Must return a tuple with the function value and the gradient # (as a list) or None to abort the minimization def function(x): f = x[0]**2+abs(x[1])**3 g = [2*x[0], 3*abs(x[1])*x[1]] return f, g # Optimizer call rc, nf, x = tnc.minimize(function, x = [-7, 3], low = [-10, 1], up = [10, 10]) print "After", nf, "function evaluations, TNC returned:", tnc.RCSTRINGS[rc] print "x =", x print "exact value = [0, 1]"

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ANN: eric3 3.4 released
by Detlev Offenbach 03 Apr '04

03 Apr '04

Hi, I have just uploaded the new release of eric3 (version 3.4). This release features the following enhancements compared to version 3.3.1. - It comes with it's own source documentation generator. - Support for Quixote PTL files. - Capability to generate various UML-like diagrams from the source code. - Interface to the cyclops cycles finder (a copy of cyclops is included). - Import/Export of keyboard shortcuts. - A QRegExp and a Python regexp wizard. a bunch of smaller usability enhancements, lots of bug fixes and internal changes. It is available via http://www.die-offenbachs.de/detlev/eric3.html. Upgrade notice: Starting with this release only XML project files are supported. Please make sure to save existing project in the XML format before installing the new release. Alternatively you may download a conevrsion tool from the contributions page. What is it? ----------- Eric 3.4 (or short eric3) is a Python IDE written using PyQt and QScintilla. It has integrated project management capabilities, it gives you an unlimited number of editors, an integrated Python shell, an integrated debugger and much more. Please see for yourself by visiting the a.m. page (it contains a picture of Eric our mascot as well). Please report bugs, feature wishes or code contributions to eric-bugs(a)die-offenbachs.de Help wanted!! ------------- I really need some support in the area of more translations and user documentation. Any volunteers out there? Just let me know. Regards,Detlev -- Detlev Offenbach detlev(a)die-offenbachs.de

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[ANN] csv2txt.py csv file convertion script
by paddy3118＠netscape.net 03 Apr '04

03 Apr '04

csv2text is a program I wrote to illustrate a point I made on comp.lang.python about not just creating great Python modules, or Python programs, but of doing both at the same time. This program makes the CSV module of Python more accessible by creating a program 'filter' that guesses and parses a csv file type on standard input and generates different formats on standard output. At the moment, output types are CSV, HTML (as an HTML table), and a text format that is written to be easily parsed by tools such as TCL or AWK that may not have such a powerful CSV reader module handy. The text format has conversions to allow AWK to handle CSV files with fields that contain embedded newlines (XL can generate that type of CSV file). Homepage: http://www.paddyx.pwp.blueyonder.co.uk/csv2txt/README.html Cheers, Paddy.

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Python-announce-list April 2004