[Python-Dev] pypy-0.9.0: stackless, new extension compiler
Ben.Young at risk.sungard.com
Ben.Young at risk.sungard.com
Mon Jun 26 11:34:08 CEST 2006
python-dev-bounces+python=theyoungfamily.co.uk at python.org wrote on
> The PyPy development team has been busy working and we've now packaged
> our latest improvements, completed work and new experiments as
> version 0.9.0, our fourth public release.
> The highlights of this fourth release of PyPy are:
> **implementation of "stackless" features**
> We now support the larger part of the interface of the original
> Stackless Python -- see http://www.stackless.com for more. A
> significant part of this is the pickling and unpickling of a running
> These features, especially the pickling, can be considered to be a
> "technology preview" -- they work, but for example the error
> is a little patchy in places.
> The "extension compiler" is a new way of writing a C extension for
> CPython and PyPy at the same time. For more information, see its
> Most useful in combination with the ext-compiler is the fact that
> translation framework can translate code that uses the
> standard-in-Python-2.5 ctypes module. See its documentation for
> **framework GCs**
> PyPy's interpreter can now be compiled to use a garbage collector
> written in RPython. This added control over PyPy's execution makes
> implementation of new and interesting features possible, apart from
> being a significant achievement in its own right.
> The PyPy interpreter's compatibility with CPython continues
> now we support __del__ methods, the __subclasses__ method on types
> weak references. We now pass around 95% of CPython's core tests.
> **logic space preview**
> This release contains the first version of the logic object space,
> which will add logical variables to Python. See its docs for more:
> **high level backends preview**
> This release contains the first versions of new backends targeting
> level languages such as Squeak and .NET/CLI and updated versions of
> interpreter yet, but they're getting there...
> **bugfixes, better performance**
> As you would expect, performance continues to improve and bugs
> to be fixed. The performance of the translated PyPy interpreter is
> 2.5-3x times faster than 0.8 (on richards and pystone), and is now
> stable enough to be able to run CPython's test suite to the end.
> **testing refinements**
> py.test, our testing tool, now has preliminary support for doctests.
> We now run all our tests every night, and you can see the summary
> What is PyPy (about)?
> PyPy is a MIT-licensed research-oriented reimplementation of Python
> written in Python itself, flexible and easy to experiment with. It
> translates itself to lower level languages. Our goals are to target a
> large variety of platforms, small and large, by providing a
> compilation toolsuite that can produce custom Python versions.
> Platform, memory and threading models are to become aspects of the
> translation process - as opposed to encoding low level details into
> the language implementation itself. Eventually, dynamic optimization
> techniques - implemented as another translation aspect - should become
> robust against language changes.
> Note that PyPy is mainly a research and development project and does
> not by itself focus on getting a production-ready Python
> implementation although we do hope and expect it to become a viable
> contender in that area sometime next year.
> PyPy is partially funded as a research project under the European
> Union's IST programme.
> Where to start?
> Getting started: http://codespeak.net/pypy/dist/pypy/doc/getting-
> PyPy Documentation: http://codespeak.net/pypy/dist/pypy/doc/
> PyPy Homepage: http://codespeak.net/pypy/
> The interpreter and object model implementations shipped with the 0.9
> version can run on their own and implement the core language features
> of Python as of CPython 2.4. However, we still do not recommend using
> PyPy for anything else than for education, playing or research
> Ongoing work and near term goals
> The Just-in-Time compiler and other performance improvements will be one
> the main topics of the next few months' work, along with finishing the
> logic object space.
> Project Details
> PyPy has been developed during approximately 20 coding sprints across
> Europe and the US. It continues to be a very dynamically and
> incrementally evolving project with many of these one-week workshops
> to follow.
> PyPy has been a community effort from the start and it would
> not have got that far without the coding and feedback support
> from numerous people. Please feel free to give feedback and
> raise questions.
> contact points: http://codespeak.net/pypy/dist/pypy/doc/contact.html
> have fun,
> the pypy team, (Armin Rigo, Samuele Pedroni,
> Holger Krekel, Christian Tismer,
> Carl Friedrich Bolz, Michael Hudson,
> and many others:
> PyPy development and activities happen as an open source project
> and with the support of a consortium partially funded by a two
> year European Union IST research grant. The full partners of that
> consortium are:
> Heinrich-Heine University (Germany), AB Strakt (Sweden)
> merlinux GmbH (Germany), tismerysoft GmbH (Germany)
> Logilab Paris (France), DFKI GmbH (Germany)
> ChangeMaker (Sweden), Impara (Germany)
> And not only in the sense that they imagine heretics where these
> do not exist, but also that inquistors repress the heretical
> putrefaction so vehemently that many are driven to share in it,
> in their hatred of the judges. -- The Name Of The Rose, Umberto Eco
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