Mailman 3 April 2013 - Python-announce-list

ANN: Hy - Python / Lisp interoperability layer
by Paul Tagliamonte 06 Apr '13

06 Apr '13

Hello, World! tl;dr ===== Version: 0.9.4 License: Expat (sometimes called MIT) Hilarious: Yes Hy is a wicked funny hack that lets you interop (in both directions) with Lisp from Python (or with Python from Lisp). It's pip installable: $ pip install hy [...] $ hy => (print (.join ", " ["Hello" "World"])) Hello, World (REPL even has cute readline bits mostly workingish, with a few known issues) And the source is on GitHub @ http://git.io/hy (star it, fork it, hack it) It's undergoing changes quite quickly - so, be careful! OK, what is it (technically) ============================ Hy is a set of hacks, implemented in Python, to lex and compile a Lisp variant (called `Hy', which looks very similar to Clojure in some ways) into Python AST, and transparently load it into sys.modules using a PEP 302 import hook. I gave a lightning talk about Hy at PyCon, in case anyone's having flashbacks. You can see that talk on my blog (http://blog.pault.ag/post/46982895940/), or watch a full hour-long talk about Hy at Boston Python at http://www.youtube.com/watch?v=ulekCWvDFVI Right, so that means? ===================== You can do hilarious (hylarious?) things like write full Django projects[1] in Lisp, or interop with pymongo[2], or even use pdb to debug Lisp code[3]. Wait, are you serious? ====================== About it working? Yup! About making this lisp-variant production quality? Not really. It's just really funny, and helps teach people about how awesome Python is. Whatabout Macros? ================= Yep!(*) *: but you have to write them in Python for now (code plot'ed) :( Docs? ===== Yep! http://hy.rtfd.org/ - could use help! Hacks welcome! With lots of love, paultag Special thanks to the current contributors: * Thomas Mashek <thomas(a)thescoundrels.net> * Amrut Joshi <amrut.joshi(a)gmail.com> * Christopher Allan Webber <cwebber(a)dustycloud.org> * Will Kahn-Greene <willg(a)bluesock.org> * James King <james(a)agentultra.com> * Julien Danjou <julien(a)danjou.info> * Nicolas Dandrimont <nicolas.dandrimont(a)crans.org> [1]: https://github.com/paultag/djlisp [2]: https://gist.github.com/paultag/5188459 [3]: http://blog.pault.ag/post/45232056896/hilariously-debuggable-lisp-hy -- .''`. Paul Tagliamonte <paultag(a)debian.org> : :' : Proud Debian Developer `. `'` 4096R / 8F04 9AD8 2C92 066C 7352 D28A 7B58 5B30 807C 2A87 `- http://people.debian.org/~paultag

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ANNOUNCE: flufl.enum 4.0
by Barry Warsaw 05 Apr '13

05 Apr '13

I am happy to announce flufl.enum version 4.0. What is flufl.enum? It is an enumeration package with a simple syntax, and concise and specific semantics. flufl.enum is compatible with Python 2.7, 3.2, and 3.3. It is proposed for inclusion in Python 3.4 by way of PEP 435. My thanks to Eli Bendersky for his help with both the code and in authoring the PEP, as well as everyone who participated in discussions on python-dev, python-ideas, and at the PyCon 2013 language summit. Changes since 3.2: - Added the IntEnum variant. When you create an enumeration with this base class, the resulting enum values *are* ints and can be used anywhere a Python int can be used, including in the C API. (LP: #1132976) - make() is deprecated. You can now just call Enum() or IntEnum() to programmatically create enumerations. (LP: #1162375). These constructors now also accept a space-separated string of attribute names which are auto-split and auto-numbered. They also accept a dictionary mapping names to values. - IntEnums values support __index__() for slicing (LP: #1132972), as well as__int__() for coercion to a concrete integer. - EnumValue.__int__() is deprecated; use IntEnumValue (via IntEnum) instead. - EnumValues now have a .value attribute to access the actual, underlying value. (LP: #1132859) - Previously deprecated attributes .enumclass and .enumname have been removed, as well as the module function make_enum(). (LP: #1132951) - Minor API changes: the repr of enum values say "value=" instead of "int=", and multiple enum values in a single enum definition now raises ValueError instead of TypeError. - Single argument Enum() calling as a synonym for getitem is deprecated. - Other bugs fixed: LP: #1026403, LP: #1132830, LP: #1124596 Full documentation is available here: http://pythonhosted.org/flufl.enum/README.html The project home is at: https://launchpad.net/flufl.enum You can report bugs at: https://bugs.launchpad.net/flufl.enum Download the package from the Cheeseshop: https://pypi.python.org/pypi/flufl.enum or from the Launchpad project page above. Read PEP 435: http://www.python.org/dev/peps/pep-0435/ Enjoy, -Barry

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gui2py alpha 0.9a: Simple and powerful GUI framework for agile development, released
by Mariano Reingart 04 Apr '13

04 Apr '13

FYI gui2py is a “fork” of PythonCard (a simple software construction kit based on wxpython), but improved trying to enhance it with a modern look & feel (better visual designer, property grid, drag & drop toolbox, etc.) and keeping it simple and powerful (i.e. adding MVC List, Tree, Grid, easier layout with Notebook, Sizers and Web-like features): https://code.google.com/p/gui2py/ It was based initially mainly on PythonCard (and also on wxPython Demo, wxGlade and other related projects), but also it includes a lot of experience and personal needs (it would be used to port a legacy ERP-like system for SME, actually composed of a large Visual Basic 5.0 classic codebase). For more info see: https://code.google.com/p/erplibre/ It is also aimed for teaching in introductory and intermediate programming courses (prior web development assignments), so it was simplified even further and adopted some HTML/Javascript features. In parallel, gui2py is part of a meta-project called rad2py (Rapid Application Development for Python), an academic research about software engineering best practices and quality assurance, whose goals are to integrate an IDE (code editor, debugger, unit test and other tools) with agile methodologies and a well defined software process (mainly for metrics collection, analysis and estimation): https://code.google.com/p/rad2py/ https://gui2py.googlecode.com/hg/screenshots/win8/rad2py_ide2py_gui2py_inte… As gui2py it is not completely backwards compatible with PythonCard, a lot of code was changed/removed or added, it was "forked" in a separate project to not cause confusions. Migration should be easy, and an automatic tool is planned to convert PythonCard resources and source code to gui2py requeriments. New features are only available on gui2py, and they could not be backported to PythonCard. This alpha release is functional and "stable" for development porposes, but expect some APIs to change in the near future, and a lot of features still need to be incorporated. Screenshots (Windows, Mac OS X, Ubuntu): https://code.google.com/p/gui2py/wiki/SampleScreenshots https://code.google.com/p/gui2py/wiki/ToolsScreenshots Quick Start Installation Guide: https://code.google.com/p/gui2py/wiki/QuickStart Roadmap: https://code.google.com/p/gui2py/wiki/RoadMap Feedback is welcome, and of course, if you are interested, I've created this group where anyone can participate: http://groups.google.com/group/gui2py gui2py(a)googlegroups.com My special thanks to all of the PythonCard's, wxPython's and Python's developers that made this possible Best regards, Mariano Reingart http://www.sistemasagiles.com.ar http://reingart.blogspot.com

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ANN: gcc-python-plugin 0.12
by David Malcolm 04 Apr '13

04 Apr '13

gcc-python-plugin is a plugin for GCC 4.6 onwards which embeds the CPython interpreter within GCC, allowing you to write new compiler warnings in Python, generate code visualizations, etc. It ships with "gcc-with-cpychecker", which implements static analysis passes for GCC aimed at finding bugs in CPython extensions. In particular, it can automatically detect reference-counting errors: http://gcc-python-plugin.readthedocs.org/en/latest/cpychecker.html Major new features in 0.12 ========================== * support added for GCC 4.8 (along with 4.6 and 4.7) * addition of a new "gcc-c-api" component to isolate much of GCC's internals (and the differences between 4.6-4.8). I plan for this to eventually be its own project, aiming at providing a stable API and ABI for working with GCC, once it has proven itself in the context of the python plugin. * link-time-optimization support, for e.g. whole-program visualizations across multiple source files. See http://gcc-python-plugin.readthedocs.org/en/latest/0.12.html for more information, and for details of the numerous other changes. Tarball releases are available at: https://fedorahosted.org/releases/g/c/gcc-python-plugin/ Prebuilt-documentation can be seen at: http://gcc-python-plugin.readthedocs.org/en/latest/index.html The project's homepage is: https://fedorahosted.org/gcc-python-plugin/ The plugin and checker are Free Software, licensed under the GPLv3 or later. Enjoy! Dave Malcolm

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New version of (french) "Une introduction à Python 3"
by Laurent Pointal 04 Apr '13

04 Apr '13

Hello, a new version of B.Cordeau book, for which i was invited to participate, is now online here: http://perso.limsi.fr/pointal/_media/python:cours:courspython3.pdf This (french) book is for people intending to learn Python as first programming language. A+ L.Pointal. -- Laurent POINTAL - laurent.pointal(a)laposte.net

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Course: Content-Management mit Plone (German), September 12 - 13, 2013
by Mike Müller 04 Apr '13

04 Apr '13

Content-Management mit Plone (German) ===================================== Date: September 12 - 13, 2013 Location: Leipzig, Germany Language: German Link: http://www.python-academy.de/Kurse/kurs_plone.html (The following is in German, the instruction language.) Der Kurs richtet sich an Autoren und Redakteure sowie Contentmanager und Webmaster, die Inhalte mit Hilfe des Content-Management-Systems Plone erstellen und pflegen wollen. Es sind keine Grundkenntnisse erforderlich. Plone ist in Python implementiert. Im Gengensatz zu den anderen Kursen der Python Academy geht es nicht um das Programmieren, sondern um das Nutzen von Software. Wer tiefer einsteigen und mit Python programmieren möchte, zum Beispiel um Plone zu erweitern, kann aus vielen Kursen auswählen. Unten sind die nächsten Kurs-Termine aufgelistet. --- Our next courses: 14.04.-17.04.2013 (Leipzig) Python für Nicht-Programmierer (German) 15.04.-17.04.2013 (Leipzig) Python für Programmierer (German) 18.04.-20.04.2013 (Leipzig) Python für Wissenschaftler und Ingenieure (German) 03.06.-05.06.2013 (Leipzig) Einstieg in Django (German) 06.06.-08.06.2013 (Leipzig) Django für Fortgeschrittene (German) 10.06.-12.06.2013 (Leipzig) Python for Scientists and Engineers (English) 13.06.2013 (Leipzig) Fast Code with the Cython Compiler (English) 14.06.2013 (Leipzig) Fast NumPy Processing with Cython (English) 24.06.-26.06.2013 (Leipzig) Professional Testing with pytest and tox (English) 09.09.-11.09.2013 (Leipzig) Twisted Training (English) 12.09.-13.09.2013 (Leipzig) Content-Management mit Plone (German) 04.11.-06.11.2013 (Leipzig) Introduction to Django (English) 07.11.-09.11.2013 (Leipzig) Advanced Django (English)

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[Announcement] New mailing list for code quality tools including Flake8, Pyflakes and Pep8
by Ian Cordasco 03 Apr '13

03 Apr '13

Hello, There's a new mailing-list related to Python code-quality tools. Are you concerned about the evolution of various code checkers? Do you have questions or suggestions? Subscribe here: http://mail.python.org/mailman/listinfo/code-quality Best regards, Ian

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Call for papers for Dyla'13: 7th Workshop on Dynamic Languages and Applications @ECOOP
by Damien Cassou 03 Apr '13

03 Apr '13

Call for Papers =========================================================== Dyla'13, 7th Workshop on Dynamic Languages and Applications Colocated with ECOOP, ECMFA and ECSA In-cooperation with SIGPLAN and SIGSOFT 1–5 July, Montpellier, France http://rmod.lille.inria.fr/web/pier/Events/Dyla13 !! Important dates - Submission deadline: *April 19th* - Notification: mid-May - Workshop: July 1st - Ecoop early registration: mid-May !! Abstract The advent of Java and C# has been a major breakthrough in the adoption of some important object-oriented language characteristics. This breakthrough turned academic features like interfaces, garbage collection, and meta-programming into technologies generally accepted by industry. Nevertheless, the massive adoption of these languages now also gives rise to a growing awareness of their limitations. A number of reactions from industry testify this: invokedynamic bytecode instruction has been included in latest Java virtual machine release; the dynamic language runtime (DLR) is gaining popularity; C# adopted dynamic as a valid static type. Gartner prognoses further growth (http://blogs.gartner.com/mark_driver/2008/12/10) of dynamic languages. Researchers and practitioners struggle with static type systems, overly complex abstract grammars, simplistic concurrency mechanisms, limited reflection capabilities, and the absence of higher-order language constructs such as delegation, closures and continuations. Dynamic languages such as Ruby, Python, JavaScript and Lua are a step forward in addressing these problems while getting more and more popular. Making these languages mainstream requires practitioners to look back and pick mechanisms up in existing dynamic languages such as Lisp, Scheme, Smalltalk and Self. Practitioners also need to further explore discover new dynamic approaches in the context of new challenging fields such as pervasive computing. The goal of this workshop is to act as a forum where practitioners can discuss new advances in the design, implementation and application of dynamically typed languages that, sometimes radically, diverge from the statically typed class-based mainstream. Another objective is to discuss new as well as older "forgotten" languages and features in this context. Topics of interest include, but are not limited to: - programming language extensions - programming environment extensions - executing environments - static and dynamic analyses - optional type-checking - meta-object protocols - reserve engineering - domain-specific languages/tooling - testing environments - live programming !! Targeted audience The expected audience of this workshop is practitioners and researchers sharing the same interest in dynamically typed languages. Lua, Python, Ruby, Scheme and Smalltalk are gaining a significant popularity both in industry and academia. Nevertheless, each community has the tendency to only look at what it produces. Broadening the scope of each community is the goal of the workshop. To achieve this goal we will form a PC with leading persons from all languages mentioned above, fostering participation from all targeted communities. !! Workshop Format and Submission Information The workshop will have a demo-oriented style. The idea is to allow participants to demonstrate new and interesting features and discuss what they feel is relevant for the dynamic-language community. To participate to the workshop, you can either - submit (before __April 19th 2013__) an article (ACM Tighter Alternate style http://www.acm.org/sigs/publications/proceedings-templates) describing your presentation and/or tool. Articles whose length ranges from 2 to 15 pages will be carefully reviewed by a program committee including but not limited to the organizers. Each accepted paper will be presented for 20 to 30 minutes and be published to the ACM Digital Library (at the option of each author) and the workshop's web site. The submission website is http://www.easychair.org/conferences/?conf=dyla2013. - or give a 10-minute lightning demo of your work. A dedicated session will be allocated for this, provided there is ample time available. A session on pair programming is also planned. People will then get a chance to share their technologies by interacting with other participants. !! Program committee - Carl Friedrich Bolz, Heinrich-Heine-Universität Düsseldorf, Germany (http://cfbolz.de) - Camillo Bruni, Inria Lille-Nord Europe, France (http://rmod.lille.inria.fr/web/pier/team/bruni) - Adrian Kuhn, University of British Columbia, Canada (https://www.cs.ubc.ca/people/adrian-kuhn) - Lukas Renggli, Google, Switzerland (http://www.lukas-renggli.ch/) - Juan Pablo Sandoval Alcocer, University of Chile (http://users.dcc.uchile.cl/~jsandova/) - Bastian Steinert, Hasso-Plattner-Institute, Germany (http://www.bastiansteinert.org) - Veronica Uquillas Gomez, Vrije Universiteit Brussel, Belgium (http://soft.vub.ac.be/~vuquilla/) - Simon Urli, University of Nice-Sophia Antipolis, France (http://www.simonurli.fr/) - Didier Verna, EPITA Research and Development Laboratory, France (http://www.lrde.epita.fr/~didier) - the 4 workshop organizers !! Workshop Organizers - Alexandre Bergel (http://bergel.eu) - Damien Cassou (http://damiencassou.seasidehosting.st) - Jorge Ressia (http://www.jorgeressia.com) - Serge Stinckwich (http://www.doesnotunderstand.org) !! News feed Follow us on twitter: http://twitter.com/dyla2013 For further information: http://rmod.lille.inria.fr/web/pier/Events/Dyla13

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[ANN] PyCon Ireland 2013
by Diarmuid Bourke 03 Apr '13

03 Apr '13

Hi All, We are pleased to announce that PyCon Ireland will take place in Dublin this year. When: Saturday 12th - Sunday 13th October Where: The Burlington Hotel (Information on ticket prices, etc. will be announced soon.) We will also have a two-day sprints held after the conference, this is free for all to attend. When: Monday 14th - Tuesday 15th October Where: Venue TBA Call for Sponsors: Form open for submissions from 12pm on Tuesday 9th April. https://docs.google.com/forms/d/1bo87oESHcAyxr2raffcKkP4WyQEQctDyWGQN1amcjJ… Call for Speakers: https://docs.google.com/forms/d/1fBPxGD5f6Idp9q6ftog8CLCLMoBld4e05mRvyDZpac… If you have any questions, please email pycon(a)python.ie. Kindest Regards, PyCon Ireland 2013 Committee -- Diarmuid Bourke Python Ireland / Chairperson diarmuid(a)python.ie

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Twisted 13.0.0 released
by Thomas Hervé 03 Apr '13

03 Apr '13

On behalf of Twisted Matrix Laboratories, I am pleased to announce the release of Twisted 13.0. Among the 70 tickets closed, we can see: * A new "Introduction to Deferreds" document that you can find here: http://twistedmatrix.com/documents/13.0.0/core/howto/defer-intro.html * A fix in twisted.web.template where attributes were not quoted properly, risking HTML injection. * Support for unicode domain names in twisted.names SRVConnector and Name classes, after a 12.3 regression. * A workaround for platform limitations when trying to schedule events far in the future. For more information, see the NEWS file here: http://twistedmatrix.com/Releases/Twisted/13.0/NEWS.txt Download it now from: http://pypi.python.org/packages/source/T/Twisted/Twisted-13.0.0.tar.bz2 or http://pypi.python.org/packages/2.7/T/Twisted/Twisted-13.0.0.win32-py2.7.msi Thanks to the supporters of Twisted via the Software Freedom Conservancy and to the many contributors for this release. -- Thomas

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