Python-announce-list January 2000

python-announce-list@python.org

37 participants
51 discussions

Pyfort-3.0
by Paul F. Dubois 11 Jan '00

11 Jan '00

Pyfort 3.0, the Python-Fortran connection tool, is available at ftp://ftp-icf.llnl.gov/pub/python/Pyfort-3.0.tgz. Documentation is included. News: Pyfort uses Distutils (www.python.org/sigs/distutils-sig) both to install itself and to build and install extensions built with Pyfort. There are many new features to control the behavior of the tool, including provisions for optional automatic transposing, reversed-shape Fortran arrays, and valued scalars. A valued scalar is an integer argument to a Fortran routine that determines all or part of the shape of another argument. This fact can now be declared in the input. For example, if Fortran routine foo has arguments foo (n, x), where x is a real array of length n, you have the option to declare this as: subroutine foo (n, x) integer n = size(x) real x(n) end (size is the F90 intrinsic, and can take a second argument to indicate the dimension if x has more than one) Then the Python user would call foo as foo(x), and not need to specifiy the redundant information that n is x's length. Some persons do not want any of the features mentioned. They may rest assured that declaring all arguments intent(inout) will result in what some have called a "raw" interface. REFERENCE: <A HREF="http://dubois.simplenet.com/python">Pyfort 3.0</A> - Fortran/Python Connection Tool. (11-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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Sketch 0.6.4 - A Vector Drawing Program
by Bernhard Herzog 11 Jan '00

11 Jan '00

Sketch 0.6.4 - A vector drawing program Sketch is a vector drawing program for Linux and other unices. It's intended to be a flexible and powerful tool for illustrations, diagrams and other purposes. Despite the low version number, it already has advanced features like gradients, text along a path and clip masks and is fully scriptable due to its implementation in a combination of Python and C. News: ----- This is mainly a bug-fix release. Summary of the Changes since 0.6.3: * Bug fixes, most notably for the EPS-related bug in Sketch's PostScript prolog. * Updated Spanish translations * More color icons * The mkfontdb.py script can also generate Fontmap files now Please also note that Sketch has moved to a new location: http://sketch.sourceforge.net/ Homepage: --------- http://sketch.sourceforge.net/ Features: --------- o Drawing primitives: o Rectangles o Ellipses o Bezier curves o Bitmap images: JPEG, GIF,... (all types the Python Imaging Library can read) o Encapsulated PostScript o Text o All objects, including images and text, can be rotated, scaled, sheared, etc. (all affine transformations are possible) o Gradient fills o Special Effects and Features: o Use rectangles, ellipses and bezier objects as guides o Blend Groups: Automatically updated interpolations of arbitrary objects o Text can be converted to bezier objects. o Text along Path o Exports Encapsulated PostScript, SVG and Adobe Illustrator files o Imports Adobe Illustrator, Corel CMX, SVG, XFig and WMF files o Fully scriptable in Python For more information, have a look at the Sketch webpage. License: -------- Sketch is released under GNU Library General Public License. <A HREF="http://sketch.sourceforge.net/">Sketch 0.6.4</A> - a vector drawing program for Unix written in Python. (11-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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Updated pyFLTK - FLTK Wrappers
by morse＠harborcom.net 11 Jan '00

11 Jan '00

pyFLTK is a wrapper for the Fast-Light Toolkit - a cross platform GUI library. The wrapper also includes a program to convert the FLTK GUI designer output to Python code. The library is available at: http://fltk.netpedia.net/ Bowser's now have preliminary data support, flconvert (Fluid GUI Builder to Python) is now a program and supports scoped identifiers. Hello World with a Cancel Button looks like this: from fltk import * import sys def theCancelButtonCallback(ptr): sys.exit(0) window = Fl_Window(100, 100, 200, 90, sys.argv[0]) button = Fl_Button(9,20,180,50,"Hello World") button.callback(theCancelButtonCallback) window.end() window.show(len(sys.argv), sys.argv) Fl.run() Recent Changes: ---------------------- 1/11/00 KPD completed install-python option 1/8/00 KPD fixed test/boxtype.py, test/PyAppWithGUI added to INSTALL file 1/7/00 KPD added flconvert support for declarations and classes added ifdef Python sentries to browser changes added demo runner test/demos.py fixed browser data bug 1/6/00 KPD added data support to browser, still needs some work to handle arbritary script object types 1/4/00 KPD updated README reorganized notes added test/PyAppWithGUI changed fluid parser to allow scoped indentifiers 12/29/99 KPD fixed Python Menu callback bug - menus weren't using the new CallBackStruct fixed MS-Windows build fixed function return values in src/Fl_Wrapper in swig/py_timeout.i: MS VCC couldn't handle pointer initializaition, had to change to assignment removed default paramter value from contrib/Check_Browser.cc removed test/arc.py because it can't work with the current system - no way to subclass a widget in Python yet 11/19/99 KPD fixed Python Fl_Widget callbacks to make them work with data <A HREF="http://fltk.netpedia.net/">pyFLTK 11-Jan-2000</A> - Python wrapper for the FLTK lightweight, good looking, easy-to-use C++ cross-platform (UNIX/Win32) GUI library. (11-Jan-99) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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Installer - Linux beta 01, Windows beta 3f
by Gordon McMillan 11 Jan '00

11 Jan '00

The new betas are available at: http://starship.python.net/crew/gmcm/distribute.html The Windows beta is bug fixes: - run from CDROM works - some path problems fixed - some case-mismatch problems fixed The Linux beta is the first release for this platform. It includes these capabilities: - turning a script into an isolated single-directory installation - building compressed Python code archives - building zip-like archives that can contain anything (Actually, the latter two capabilites should work on any Unix platform). Installations created this way are completely insulated from any Python installations on the target machine. There is no problem using shared extension modules; these will be detected and made part of the installation. License: Python style (do as thou wilt; maintain copyright notices). Contact: gmcm(a)hypernet.com <A HREF="http://starship.python.net/crew/gmcm/distribute.html">Installer: Linux beta 01, Windows beta 3f</A> - distribute Python apps, modules and packages easily; available under Python-style license. (08-Jan-2000) - Gordon -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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XMLTreeCntrol 0.1
by Darrell 11 Jan '00

11 Jan '00

I mentioned my xmlP tree control as a code example and started getting lots of hits. But it wasn't really in any shape for public consumption. I fixed a couple of things and packaged all the required files into a zip. http://www.dorb.com/darrell/xmlP/ Also a screen shot http://www.dorb.com/darrell/xmlP/scrn.jpg the numbers to the right are the line number. It will view anything with tags in it. Things like this aren't handled: <![CDATA[ expr="age > 18" ]]> That came from the Zope site, so I have some more work todo someday. If you have wxPython it should work at least as good as it does for me. == --Darrell <A HREF="http://www.dorb.com/darrell/xmlP/">XMLTreeCntrol 0.1</A> - a simple graphical XML tree control for wxWindows/wxPython. (08-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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pyFinancials-0.66: a collection of financial algorithms
by g.p.ciceri 11 Jan '00

11 Jan '00

Hello all, I've just upload on Starship a little collection of financial algorithms. In this release there is stuff for: - Cash Flow (IRR) - Basic Option Pricing - Binomial Option Pricing - Finite Difference - Option Price MC Simulation - Futures Algorithms - Bonds Algorithms - General Simulation - Term Structure Algorithms - Fixed Income Modelling You can find it at http://starship.python.net/~zanzi/pyFinancials-0.66.tgz It's released under GPL/LGPL. Enjoy /gp == "If one advances confidently in the direction of his dreams, and endeavors to live the life which he has imagined, he will meet with a success unexpected in common hours." (Thoreau, "Walden") Gian Paolo Ciceri Via B.Diotti 45 - 20153 Milano MI ITALY mobile : ++39 347 4106213 eMail : gp.ciceri(a)acm.org webSite: http://www.tialabs.com <A HREF="http://starship.python.net/~zanzi/">pyFinancials-0.66</A> - a little collection of financial algorithms. (07-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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Multimethod.py -- multimethods in Python
by neelk＠brick.cswv.com 11 Jan '00

11 Jan '00

I'd like to announce the existence of Multimethod.py, a package that implements real (eg, CLOS/Cecil/Dylan) multimethods for Python. These are nifty for oodles of reasons, but some of the more significant are: o They make the Visitor and Strategy patterns trivial to implement. o The whole "binary method/double dispatch" problem goes away, thus promoting loose coupling and other software-engineering buzzwords. o They resolve the whole contravariance/covariance debate so totally it's hard to remember what the problem was. You can find it on my webpage at: <URI:http://www.sff.net/people/neelk/open-source> It should work out of the box on CPython 1.5.2, and Jpython if Jpython has lists that support the insert() method. I don't know about Viper, since Viper apparently has a rather different type system from vanilla Python, but it should be easy to port, though. The current version is quite rough, with lame algorithms used in a couple of places and very substandard documentation. But it all works, and is quite usable for experimentation and learning. (Incidentally, is this the sort of thing that should go on the types-sig?) Neel <A HREF="http://www.sff.net/people/neelk/open-source">Multimethod.py</A> - support for real (i.e. CLOS/Cecil/Dylan-style) multimethods for Python. (07-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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Oedipus v0.05 released
by Andrew M. Kuchling 11 Jan '00

11 Jan '00

Version 0.05 of the Oedipus package for maintaining a hierarchical database of Web links has been released. (This package was originally called the ODP package, but the new name is more memorable.) Oedipus is a Python package for creating and maintaining hierarchical trees of Web links. An XML format compatible with the Open Directory Project (ODP) is supported; refer to www.dmoz.org for more information about the ODP. In theory, you can load the entire ODP's database and make it available using Oedipus; in practice, I haven't yet verified that the code scales up to that amount of data. A prototype Zope product is included in the package that allows browsing through an Oedipus database. Versions 0.03 and 0.04 were never announced anywhere, so the list of changes from 0.02 is significant: * Scalability has been improved; while I still haven't processed the whole ODP dataset, I've done the 75Mb structure file, and an unknown chunk of the content file. It stopped when I got bored, not when the script crashed. :) * The code no longer require the XML-SIG's parser package; now it can use xmllib.py to parse input data. * Rearranged the Database class to use Metakit to store the data. It should still be possible to implement different persistence methods, such as Zope's BTree object or GDBM, but I don't feel much of a need to do that. Accordingly, the GDBM and ZODB classes have been dropped. * Lots of other classes were rearranged, too. * The code can now be installed using the Distutils. Oedipus can be downloaded from http://www.mems-exchange.org/software/python/oedipus/ . == A.M. Kuchling http://starship.python.net/crew/amk/ Two things I learned for sure during a particularly intense acid trip in my own lost youth: (1) everything is a trivial special case of something else; and, (2) death is a bunch of blue spheres. -- Tim Peters, 1 May 1998 <A HREF="http://www.mems-exchange.org/software/python/oedipus/">Oedipus v0.05</A> - a Python package for creating and maintaining hierarchical trees of Web links; supports an XML format compatible with the Open Directory Project (ODP); uses the Metakit database for storage. (06-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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web2ldap.py 0.6.4: WWW gateway for accessing LDAP servers
by Michael Ströder 11 Jan '00

11 Jan '00

HI! I would like to announce a new version of web2ldap (formerly known as ldap-client-cgi.py), a full-featured LDAPv2 client written in Python designed to run as a CGI-BIN under the control of a WWW server. It's available for free (GPL) from http://www.web2ldap.de/ There's also a working demo there. I would like to encourage people to give feedback about the usability of this program. Ciao, Michael. Changes since 0.6.2: - Some minor enhancements of user interface - Fixed a basedn-related bug in smart login search - Added automatically start of CGIHTTPServer.py if web2ldap.py is invoked from command-line (only Unix up to now). Changes since 0.5.8: - enhanced user interface Changes since 0.5.6: - some code cleaning / bug fixing - enhanced direct handling of UTF-8 input/output more conform to HTML4 standard - new feature: for each host a dictionary with DNs as keys can be created to define the default objectclass and attribute for forming DNs for subordinate entries (see example in cgi-bin/web2ldapcnf.py under host ldap.ms.inka.de). This is handy in situations where unexperienced users have to add entries without knowing how to form a new DN. Changes since 0.5.3: - some code cleaning / bug fixing in login procedure - some small performance enhancements - direct output of UTF-8 if browser sends UTF-8 in HTTP_ACCEPTED_CHARSET (e.g. like Netscape Communicator 4.5x does) - fixed problems with being too case sensitive in modify - some small improvements in user interface <A HREF="http://sites.inka.de/ms/python/web2ldap/">web2ldap.py 0.6.4</A> - LDAP web client; several enhancements. (06-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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4XPath and 4XSLT 0.8.1
by Uche Ogbuji 11 Jan '00

11 Jan '00

FourThought LLC (http://FourThought.com) announces the release of 4XSLT and 4XPath 0.8.1 ---------------------- A python implementation of the W3C's XSLT language 4XSLT is an XML transformation processor based on the W3C's specification for the XSLT transform language. 4XPath implements the W3C XPath language for indicating and selecting XML document components. http://www.w3.org/TR/xslt 4XPath implements the full 4XPath recommendation except for the 'lang' core function. Currently, 4XSLT supports a sub-set of the XSLT recommendation including the following: Full expression support and attribute-value template expansion xsl:include xsl:import xsl:template xsl:apply-imports xsl:apply-templates xsl:copy xsl:call-template xsl:if xsl:for-each xsl:choose xsl:element xsl:when xsl:attribute xsl:otherwise xsl:text xsl:message xsl:value-of xsl:variable xsl:processing-instruction xsl:param xsl:comment xsl:with-param xsl:strip-space xsl:key xsl:preserve-space xsl:copy-of xsl:sort xsl:namespace-alias xsl:output and, of course, xsl:stylesheet, xsl:transform, literal elements and text Using the xml output method, 4XSLT produces the result tree by throwing events from the emerging SAX 2 standard to a handler, so it can be easily modified to supply results to any SAX 2 consumer. For the 'html' and 'text' output methods special SAX consumers produce HTML DOM nodes and plain text respectively. News ---- Changes in 0.8.1 ---------------- - 4XSLT implements xsl:xsl:sort and xsl:namespace-alias - 4XSLT now implements template priorities - 4XPath now has a clear DOM-query interface - many big-fixes and more extensive testing Changes in 0.8.0 ---------------- - 4XSLT implements xsl:output - Fixes to namespace handling - support lteral element as entire style-sheet - update to latest 4DOM interface - many big-fixes and more extensive testing More info and Obtaining 4XPath and 4XSLT ---------------------------------------- Please see http://FourThought.com/4Suite/4XPath http://FourThought.com/4Suite/4XSLT Or you can download 4XSLT from ftp://FourThought.com/pub/4Suite/4XPath ftp://FourThought.com/pub/4Suite/4XSLT 4XPath and 4XSLT are distributed under a license similar to that of Python. == Uche Ogbuji FourThought LLC, IT Consultants uche.ogbuji(a)fourthought.com (970)481-0805 Software engineering, project management, Intranets and Extranets http://FourThought.com http://OpenTechnology.org <A HREF="http://FourThought.com/4Suite/4XSLT">4XSLT 0.8.1</A> - XML transformation processor based on the W3C specification for the XSLT transform language. (04-Jan-2000) -- ----------- comp.lang.python.announce (moderated) ---------- Article Submission Address: python-announce(a)python.org Python Language Home Page: http://www.python.org/ Python Quick Help Index: http://www.python.org/Help.html ------------------------------------------------------------

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Python-announce-list January 2000