Python-announce-list July 2010

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S3 2010 deadline extension
by Carl Friedrich Bolz 31 Jul '10

31 Jul '10

The S3 2010 Paper deadline was moved forward by two weeks, and is now August 13, 2010. *** Workshop on Self-sustaining Systems (S3) 2010 *** September 27-28, 2010 The University of Tokyo, Japan http://www.hpi.uni-potsdam.de/swa/s3/s3-10/ In cooperation with ACM SIGPLAN === Call for papers === The Workshop on Self-sustaining Systems (S3) is a forum for discussion of topics relating to computer systems and languages that are able to bootstrap, implement, modify, and maintain themselves. One property of these systems is that their implementation is based on small but powerful abstractions; examples include (amongst others) Squeak/Smalltalk, COLA, Klein/Self, PyPy/Python, Rubinius/Ruby, and Lisp. Such systems are the engines of their own replacement, giving researchers and developers great power to experiment with, and explore future directions from within, their own small language kernels. S3 will be take place September 27-28, 2010 at The University of Tokyo, Japan. It is an exciting opportunity for researchers and practitioners interested in self-sustaining systems to meet and share their knowledge, experience, and ideas for future research and development. --- Submissions and proceedings --- S3 invites submissions of high-quality papers reporting original research, or describing innovative contributions to, or experience with, self-sustaining systems, their implementation, and their application. Papers that depart significantly from established ideas and practices are particularly welcome. Submissions must not have been published previously and must not be under review for any another refereed event or publication. The program committee will evaluate each contributed paper based on its relevance, significance, clarity, and originality. Revised papers will be published as post-proceedings in the ACM Digital Library. Papers should be submitted electronically via EasyChair at http://www.easychair.org/conferences/?conf=s32010 in PDF format. Submissions must be written in English (the official language of the workshop) and must not exceed 10 pages. They should use the ACM SIGPLAN 10 point format, templates for which are available at http://www.acm.org/sigs/sigplan/authorInformation.htm. --- Venue --- The University of Tokyo, Komaba Campus, Japan --- Important dates --- Submission of papers: *EXTENDED* August 13, 2010 Author notification: August 27, 2010 Early registration: September 3, 2010 Revised papers: September 10, 2010 S3 workshop: September 27-28, 2010 Final papers for ACM-DL post-proceedings: October 15, 2010 --- Invited talks --- Yukihiro Matsumoto: "From Lisp to Ruby to Rubinius" Takashi Ikegami: "Sustainable Autonomy and Designing Mind Time" --- Chairs --- Robert Hirschfeld (Hasso-Plattner-Institut Potsdam, Germany) hirschfeld(a)hpi.uni-potsdam.de Hidehiko Masuhara (The University of Tokyo, Japan) masuhara(a)graco.c.u-tokyo.ac.jp Kim Rose (Viewpoints Research Institute, USA) kim.rose(a)vpri.org --- Program committee --- Carl Friedrich Bolz, University of Duesseldorf, Germany Johan Brichau, Universite Catholique de Louvain, Belgium Shigeru Chiba, Tokyo Institute of Technology, Japan Brian Demsky, University of California, Irvine, USA Marcus Denker, INRIA Lille, France Richard P. Gabriel, IBM Research, USA Michael Haupt, Hasso-Plattner-Institut, Germany Robert Hirschfeld, Hasso-Plattner-Institut, Germany (co-chair) Atsushi Igarashi, University of Kyoto, Japan David Lorenz, The Open University, Israel Hidehiko Masuhara, University of Tokyo, Japan (co-chair) Eliot Miranda, Teleplace, USA Ian Piumarta, Viewpoints Research Institute, USA Martin Rinard, MIT, USA Antero Taivalsaari, Nokia, Finland David Ungar, IBM, USA _______________________________________________ fonc mailing list fonc(a)vpri.org http://vpri.org/mailman/listinfo/fonc

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tox-0.8 and py.test-1.3.3 released
by holger krekel 30 Jul '10

30 Jul '10

Hi, just did a two test tool releases, one for tox and one for py.test. The tox-0.8 release provides fixes and workarounds, see changelog below. The py-1.3.3 release mainly provides fixes for terminal output. best & thanks to the respective feedbackers/helpers, holger What is tox? ---------------------- Tox is a generic test runner, creating virtualenv environments on the fly and executing your test tool of choice. It works conveniently from a developer's terminal as well as from a Continous Integration Server. See http://codespeak.net/tox What is py.test? ---------------------- py.test is an easy-to-learn testing tool with many plugins and features for integration and functional tests in Python. See http://pytest.org for more info. CHANGES tox-0.8 ----------------- - work around a virtualenv limitation which crashes if PYTHONDONTWRITEBYTECODE is set. - run pip/easy installs from the environment log directory, avoids naming clashes between env names and dependencies (thanks ronny) - require a more recent version of py lib - refactor and refine config detection to work from a single file and to detect the case where a python installation overwrote an old one and resulted in a new executable. This invalidates the existing virtualenvironment now. - change all internal source to strip trailing whitespaces Changes py-1.3.3 ---------------------- - fix issue113: assertion representation problem with triple-quoted strings (and possibly other cases) - make conftest loading detect that a conftest file with the same content was already loaded, avoids surprises in nested directory structures which can be produced e.g. by Hudson. It probably removes the need to use --confcutdir in most cases. - fix terminal coloring for win32 (thanks Michael Foord for reporting) - fix weirdness: make terminal width detection work on stdout instead of stdin (thanks Armin Ronacher for reporting) - remove trailing whitespace in all py/text distribution files

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execnet-1.0.8 and a green experiment
by holger krekel 30 Jul '10

30 Jul '10

I just released execnet-1.0.8, see the Changelog for details, below. What is execnet? --------------------- execnet is a small pure python library that manages distributed code execution across Python versions and host boundaries. It provides a self-bootstrapping share-nothing model with channels to send/receive data messages. It also helps with managing a cluster of (local or remote) processes and comes with tons of examples and API docs: http://codespeak.net/execnet green version of execnet -------------------------------- For those interested i hacked up a green version of execnet which is API-compatible (and less stable) than the "main" version. It requires the eventlet library and is thus not fully self-bootstrapping (you need to install eventlet on all remote nodes you want to execute code on). There is no release but you can peruse http://code.google.com/p/execnet-green/source/checkout and "python setup.py develop" to play with it. It will never spawn any operating system threads. Rather remote_exec() will spawn greenlets/micro-threads of which you can easily have a few thousand. It probably only is stable enough for simple scenarios at this point. best, holger Changelog 1.0.8 (compared to 1.0.7): - new ``gateway.remote_exec(func, **kwargs)`` style fo executing a pure function with parameters. The function on the remote side also needs to accept a ``channel`` which allows it to communicate back and forth. Thanks to Ronny Pfannschmidt for implementing it with special kudos to Maciej Fijalkowski for writing a "pure-function" checker so that on Python2.6 onwards non-pure functions will be rejected. - enhance rsyncing to also sync permissions (stat().st_mode) of directories and files. (should also resolve http://bitbucket.org/hpk42/py-trunk/issue/68/) - fix rsyncing of symlinks, thanks to Charles Solar (should also resolve http://bitbucket.org/hpk42/py-trunk/issue/70/) - update internal usage of apipkg to 1.0b6 - remote_exec(module) now makes sure that the linecache is updated before reading and sending the source. thanks Ronny, Matt. - removed all trailing whitespace from source files

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bitstring 2.0 released
by Scott Griffiths 28 Jul '10

28 Jul '10

I'm pleased to announce the release of version 2.0 of the bitstring module. What is it? ----------- bitstring helps to make creating, manipulating and deconstructing binary data as easy as possible. It allows arbitrary (and very large) bit patterns to be used without worrying about bit shifting and masking operations. The comprehensive API covers packing, reading, searching, replacing and slicing as well as bit setting and checking, a host of different binary interpretations and all the standard bit-wise operators. The module is pure Python and is available for Python 2.6 and later, including Python 3. What's new in version 2? ------------------------ The main change is a more powerful and streamlined API. Too much to go into here (see the release notes), but here are some simple examples: >>> s = BitString('0x000001b3') # create a 32-bit bitstring from hexadecimal >>> s += 'uint:12=352, uint:12=288' # append two 12-bit integers >>> s += bitstring.pack('<2f, 0b1, <h', 0.1, 3.7, 44) # pack more values >>> s.unpack('hex:32, 2*uint:12, <2f, bool, <h') # unpack it all ['0x000001b3', 352, 288, 0.10000000149011612, 3.700000047683716, True, 44] >>> s.tobytes() # convert to bytes b'\x00\x00\x01\xb3\x16\x01 \xcd\xcc\xcc=\xcd\xccl@\x96\x00\x00' >>> t = s[32:41]. # slicing >>> t.bin # the binary interpretation '0b000101100' >>> list(t.findall('0b10')) # finding bit patterns [3, 6] Where can I find out more? -------------------------- The project's homepage is at http://python-bitstring.googlecode.com/ Documentation is hosted at http://packages.python.org/bitstring/ Release note for all versions: http://code.google.com/p/python-bitstring/wiki/ReleaseNotes -- Thanks, Scott Griffiths

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[ANN] Lupa 0.10 - Lua in Python
by Stefan Behnel 27 Jul '10

27 Jul '10

Hi all, I'm happy to announce the release of Lupa 0.10. http://pypi.python.org/pypi/lupa/0.10 What is Lupa? -------------- Lupa integrates the LuaJIT2 runtime [1] into CPython. It is a rewrite of LunaticPython in Cython. Features --------- * separate Lua runtime states through a LuaRuntime class * frees the GIL and supports threading in separate runtimes when calling into Lua * Python compatible coroutine wrapper for Lua coroutines * proper encoding and decoding of strings (configurable per runtime, UTF-8 by default) * supports Python 2.x and 3.x, potentially starting with Python 2.3 (currently untested) * written for LuaJIT2, as opposed to the Lua interpreter (tested with LuaJIT 2.0.0-beta4) * easy to hack on and extend as it is written in Cython, not C This release features much faster locking of the LuaRuntime instance, especially in the single threaded case. It uses the FastRLock class that I posted as a Python Cookbook recipe [2]. Lupa 0.10 also fixes several issues in error handling cases when calling back into Python from Lua. Updating is recommended. Examples --------- >>> from lupa import LuaRuntime >>> lua = LuaRuntime() >>> lua.eval('1+1') 2 >>> lua_func = lua.eval('function(f, n) return f(n) end') >>> def py_add1(n): return n+1 >>> lua_func(py_add1, 2) 3 >>> lua_code = '''\ ... function(N) ... for i=0,N do ... coroutine.yield( i%2 ) ... end ... end ... ''' >>> lua = LuaRuntime() >>> f = lua.eval(lua_code) >>> gen = f.coroutine(4) >>> list(enumerate(gen)) [(0, 0), (1, 1), (2, 0), (3, 1), (4, 0)] Why use it? ------------ It complements Python very well. Lua is a language as dynamic as Python, but LuaJIT compiles it to very fast machine code, sometimes faster than many other compiled languages [3]. The language runtime is extremely small and carefully designed for embedding. The complete binary module of Lupa, including a statically linked LuaJIT2 runtime, is only some 500KB on a 64 bit machine. However, Lua code is harder to write than Python code as the language lacks most of the batteries that Python includes. Writing large programs in Lua is rather futile, but it provides a perfect backup language when raw speed is more important than simplicity. Lupa is a very fast and thin wrapper around LuaJIT. It makes it easy to write dynamic Lua code that accompanies dynamic Python code by switching between the two languages at runtime, based on the tradeoff between simplicity and speed. [1] LuaJIT2: http://luajit.org/ [2] http://code.activestate.com/recipes/577336-fast-re-entrant-optimistic-lock-… [3] http://shootout.alioth.debian.org/u64/performance.php?test=mandelbrot

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[ANN] Python Summer Course in Germany, August 2010
by Mike Müller 27 Jul '10

27 Jul '10

We offer a 6-day "Python Summer Course" in Leipzig, Germany from August 16 to August 21, 2010: http://www.python-academy.com/courses/python_summer_course.html The course consists of three days of "Python for Programmers": http://www.python-academy.com/courses/python_course_programmers.html August 16 to 18 and three days of "Python for Scientists and Engineers": http://www.python-academy.com/courses/python_course_scientists.html August 19 to 21 Both courses may be booked separately. Combining both gives you 6 course days for the price of 5. Please register here: http://www.python-academy.com/courses/dates.html

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Tipfy 0.6 released (a framework for App Engine)
by Rodrigo Moraes 25 Jul '10

25 Jul '10

Hi everybody, We just released version 0.6 of tipfy, a small framework made for Google App Engine. These are the most important achievements in this release: * Added support for single-file apps, which are much like we see in App Engine's webapp. Example of a single-file app: http://www.tipfy.org/paste/view/648817 * This also makes unit testing easier in several situations. App and URLs can be defined and executed in a single function. Example of a redirect test: http://www.tipfy.org/paste/view/685812 * We no longer use thread locals and removed all global variables from the core and extensions (deprecated since the 0.5.x series). More about tipfy: * Website: http://www.tipfy.org/ * Extensions repository: http://www.tipfy.org/wiki/extensions/ * Discussion group: http://groups.google.com/group/tipfy regards, rodrigo moraes

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[Python Ireland presents] August Talks at The Science Gallery (Wed 11th Aug, 19:00)
by Vicky Twomey-Lee 24 Jul '10

24 Jul '10

Hi All, When: Wed 11th Aug, 19:00 Where: The Science Gallery, Pearse Street. What: Distributed profiling using Redis (Michael Twomey) ------------------------------------------------------------------------- Mick moved his Redis talk from PyCon Ireland main tracks, so he decided to give a talk one of our regular meetups. Redis is a shared data structure server which offers an interesting opportunity to collect distributed profiling data from multiple Python processes. The Python cProfile module can be used to profile individual function calls. Combine the profiler and Redis together and you get a distributed application profiling collection service. Community building & PyCon & Python (Kevin Gill) --------------------------------------------------------------------------- "What do you want from Python?" -- Some background on what this is about, and building on the successful openspaces sessions from PyCon Ireland 2010. Pub TBD on the day (as always). :-) More details: http://www.python.ie/meetup/2010/aug_2010_talks__the_science_gallery/ All are welcome and it's free. Cheers, /// Vicky ~~~~~~~~~~~~~~~~~~~~~~~~~ ~~ http://irishbornchinese.com ~~ ~~ http://www.python.ie ~~ ~~~~~~~~~~~~~~~~~~~~~~~~~

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Sphinx 1.0 final released
by Georg Brandl 24 Jul '10

24 Jul '10

Hi all, I'm happy to announce the release of Sphinx 1.0, a new feature-laden release of the Sphinx documentation tool. What is it? =========== Sphinx is a tool that makes it easy to create intelligent and beautiful documentation for Python projects (or other documents consisting of multiple reStructuredText source files). Website: http://sphinx.pocoo.org/ What's new in 1.0 (very short version)? ======================================= Lots of stuff; most important of all domains support (see blog post at http://pythonic.pocoo.org/2009/9/12/new-in-sphinx-1-0-domains), new HTML themes, new output formats (manpage, epub). The full list is at <http://sphinx.pocoo.org/latest/changes.html>. cheers, Georg

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[ANN] Lupa 0.9 - Lua in Python
by Stefan Behnel 23 Jul '10

23 Jul '10

Hi all, I'm happy to announce the release of Lupa 0.9. http://pypi.python.org/pypi/lupa/0.9 What is Lupa? -------------- Lupa integrates the LuaJIT2 runtime [1] into CPython. It is a rewrite of LunaticPython in Cython with a couple of additional features. The major new feature in this release is coroutine support for Lua functions that follows the Python coroutine protocol (next/send). Examples --------- >>> from lupa import LuaRuntime >>> lua = LuaRuntime() >>> lua.eval('1+1') 2 >>> lua_func = lua.eval('function(f, n) return f(n) end') >>> def py_add1(n): return n+1 >>> lua_func(py_add1, 2) 3 >>> lua_func = lua.eval(''' ... function(N) ... for i=0,N do coroutine.yield(i%2) end ... end ... ''') >>> co = lua_func.coroutine(3) >>> list(co) [0,1,0,1] Why use it? ------------ It complements Python very well. Lua is a language as dynamic as Python, but LuaJIT compiles it to very fast machine code, sometimes faster than many other compiled languages [2]. The language runtime is extremely small, has a small memory footprint and is carefully designed for embedding. The complete binary module of Lupa, including a statically linked LuaJIT2 runtime, is only some 500KB on a 64 bit machine. However, Lua code is harder to write than Python code as the language lacks most of the batteries that Python includes. Writing large programs in Lua is rather futile, but it provides a perfect backup language when raw speed is more important than simplicity. Lupa is a very fast and thin wrapper around LuaJIT. It makes it easy to write dynamic Lua code that accompanies dynamic Python code by switching between the two languages at runtime, based on the tradeoff between simplicity and speed. [1] LuaJIT2: http://luajit.org/ [2] http://shootout.alioth.debian.org/u64/performance.php?test=mandelbrot

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Python-announce-list July 2010