Mailman 3 March 2016 - pypy-dev

Refcount garbage collector build error
by Papa, Florin 18 Mar '16

18 Mar '16

Hi all, This is Florin Papa from the Dynamic Scripting Languages Team at Intel Corporation. I am trying to build pypy to use the refcount garbage collector, for testing purposes. I am following the indications here [1], but the following command fails: pypy ../../rpython/bin/rpython -O2 --gc=ref targetpypystandalone with the error: [translation:ERROR] OpErrFmt: [<W_TypeObject 'exceptions.ImportError' at 0x89a68a8>: No module named _weakref] When I run pypy in interactive mode, "import _weakref" works fine. I encounter the same error if I try to use python to run the rpython script. Is the refcount garbage collector still supported? [1] http://doc.pypy.org/en/latest/config/translation.gc.html Regards, Florin

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GSoC 2016: Interested to work on the idea :Make bytearray type fast"
by Shakur Shams 16 Mar '16

16 Mar '16

Hi, I am Shakur Shams Mullick. I would like to participate in GSoC 2016 with PyPy. I have gone through the ideas list and would like to work on the idea to improve bytearray to perform fast ( http://doc.pypy.org/en/latest/project-ideas.html#make-bytearray-type-fast). I would like to work on this but I don't have any prior experience with PyPy. I have work experience as a professional python developer at a startup for about a year and I recently submitted a patch for cpython (not merged yet) and reported a bug. Previously I worked on util-linux also. Because I do not have prior knowledge of PyPy, I am not exactly sure how to implement this idea. That is why I would like to discuss this idea and would like someone to mentor me. Looking forward to your input. Thank you. Best regards, Shakur Shams Mullick

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Software benchmarking workshop, April 20, King's College London
by Sarah Mount 16 Mar '16

16 Mar '16

Dear all, PyPy developers in the UK may be interested in this event on the topic of software benchmarking. Registration will remain open until April 6th. If you have any questions please feel free to email me directly (off list). Best Practices in Software Benchmarking 2016 (#bench16) Wednesday April 20 2016 King's College London http://soft-dev.org/events/bench16/ For computer scientists and software engineers, benchmarking (evaluating the running time of a piece of software, or the performance of a piece of hardware) is a common method for evaluating new techniques. However, there is little agreement on how benchmarking should be carried out, how to control for confounding variables, how to analyse latency data, or how to aid the repeatability of experiments. This free workshop will be a venue for computer scientists and research software engineers to discuss their current best practices and future directions. For further information and free registration please visit: http://soft-dev.org/events/bench16/ Confirmed Speakers: Jan Vitek (Northeastern University) Joe Parker (The Jodrell Laboratory, Royal Botanic Gardens) Simon Taylor (University of Lancaster) Tomas Kalibera (Northeastern University) James Davenport (University of Bath) Edd Barrett (King's College London) Jeremy Bennett (Embecosm) Organizers: Sarah Mount & Laurence Tratt (King's College London)

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setting attribute of JitHookInterface instance
by Magnus Morton 16 Mar '16

16 Mar '16

Hi, I’m attempting to use the JitHookInterface to implement something like the PyPy JIT hooks in pycket. However, I’m struggling to do anything other than print information to stdout. From what I understand in pypy, the pypyjit.hooks.pypy_hooks object is instantiated, and then after the ObjSpace is initialised, it is assigned to pypy_hooks.space in setup_after_space_initialization. In my case, when I assign anything to an attribute of my JitHookInterface instance, translation blows up with [translation:ERROR] MissingRTypeAttribute: on_abort [translation:ERROR] .. (rpython.jit.metainterp.pyjitpl:2224)MetaInterp.aborted_tracing [translation:ERROR] .. block@59 with 2 exits(v1678) [translation:ERROR] .. v1680 = getattr(v1679, ('on_abort')) If any pycket people are reading this, what I’m trying to do at the moment is give a JitHookInterface instance access to the module table somehow. Copying the pypy JIT hooks approach is not strictly necessary - I’d be happy with being able to update anything from within a JitHookInterface callback which could then be accessed by application level code. Obviously, my understanding of what’s going on here is lacking somewhat. If anyone could point me in the correct general direction, I’d be very grateful. Best regards, Magnus

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Fwd: Interest in contributing to PYPY
by Djimeli Konrad 14 Mar '16

14 Mar '16

Hello, As discoursed on IRC, I am trying to develop a parser for Jitviewer, that is not dependent on rpython for my first patch. I am new to Pypy and I would like to get some help/pointer that would help me accomplish this task. Mainly resources on how log files are generated. I would also like to get more details on what improvements are to be done with respect Jitviewer, for GSOC 2016, as application are about to start. So far in trying to generate a log file, I have tried the following commands; PYPYLOG=jit-backend:/home/konro/jitviewer/logfile pypy ../source.py (to generate the log file) and I got the following output http://pastebin.com/xv7nS1i2 But when I try to view the file with Jitviewer, I get errors http://pastebin.com/LFBB12sj Please I need some help to identify what I am doing wrong. Thanks Konrad

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TO GET STARTED
by Pabitra Lenka 12 Mar '16

12 Mar '16

Greetings Developers, I am a newbie.I would like to contribute to your organization.Can anyone get me started.? -- Cheers, Pabitra Lenka Department of Information Technology Class of 2018 IIIT Bhubaneswar

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GSoC 2016
by Naveen Kumar 11 Mar '16

11 Mar '16

Hello, I'm Naveen Kumar, an Information Science Engineering student from Bangalore, India. I got to know about PyPy from a book that I started studying the book "Expert Python Programming" by Tarek Ziadé and I was totally Intrigued. I take this opportunity to be a part of the community and contribute actively. As for me, I've been using Python from the past 8 months and I built a Blog using Flask (following the footsteps of Miguel Grinberg) with features like a Music Player. Other than that, I do not have much of an experience. Again, I'd love to be a part of the community and I'd like to be guided on how to go about it. Thanks, Naveen (nkumar736(a)gmail.com)

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Call for Papers Programming Experience 2016
by Carl Friedrich Bolz 11 Mar '16

11 Mar '16

Call for Papers *** Programming Experience 2016 (PX/16) Workshop *** July 18 (Mon), 2016 Co-located with ECOOP 2016 in Rome 2016.ecoop.org/track/PX-2016 programming-experience.org/px16 === Abstract === Imagine a software development task. Some sort of requirements and specification including performance goals and perhaps a platform and programming language. A group of developers head into a vast workroom. <crossfade to developers exiting the vast workroom> The Programming Experience Workshop is about what happens in that room when one or a couple of programmers sit down in front of computers and produce code, especially when it's exploratory programming. Do they create text that is transformed into running behavior (the old way), or do they operate on behavior directly ("liveness"); are they exploring the live domain to understand the true nature of the requirements; are they like authors creating new worlds; does visualization matter; is the experience immediate, immersive, vivid and continuous; do fluency, literacy, and learning matter; do they build tools, meta-tools; are they creating languages to express new concepts quickly and easily; and curiously, is joy relevant to the experience? Correctness, performance, standard tools, foundations, and text-as-program are important traditional research areas, but the experience of programming and how to improve and evolve it are the focus of this workshop. === Submissions === Submissions are solicited for Programming Experience 2016 (PX/16). The thrust of the workshop is to explore the human experience of programming—what it feels like to program, or more accurately, what it should feel like. The technical topics include exploratory programming, live programming, authoring, representation of active content, visualization, navigation, modularity mechanisms, immediacy, literacy, fluency, learning, tool building, and language engineering. Submissions by academics, professional programmers, and non-professional programmer are welcome. Submissions can be in any form and format, including but not limited to papers, presentations, demos, videos, panels, debates, essays, writers' workshops, and art. Presentation slots will be between 30 minutes and one hour, depending on quality, form, and relevance to the workshop. Submissions directed toward publication should be so marked, and the program committee will engage in peer review for all such papers. Video publication will be arranged. All artifacts are to be submitted via EasyChair (https://easychair.org/conferences/?conf=px16). Papers and essays must be written in English, provided as PDF documents, and follow the ACM SIGPLAN Conference Format (10 point font, Times New Roman font family, numeric citation style, http://www.sigplan.org/Resources/Author/). There is no page limit on submitted papers and essays. It is, however, the responsibility of the authors to keep the reviewers interested and motivated to read the paper. Reviewers are under no obligation to read all or even a substantial portion of a paper or essay if they do not find the initial part of it interesting. === Format === Paper presentations, presentations without papers, live demonstrations, performances, videos, panel discussions, debates, writers' workshops, art galleries, dramatic readings. === Review === Papers and essays labeled as publications will undergo standard peer review; other submissions will be reviewed for relevance and quality; shepherding will be available. === Important dates === Submissions: April 15, 2016 (anywhere in the world) Notifications: May 13, 2016 PX/16: July 18, 2016 === Publication === Papers and essays accepted through peer review will be published as part of ACM's Digital Library; video publication on Vimeo or other streaming site; other publication on the PX workshop website. === Organizers === Robert Hirschfeld, Hasso Plattner Institute, University of Potsdam, Germany Richard P. Gabriel, Dreamsongs and IBM Almaden Research Center, United States Hidehiko Masuhara, Mathematical and Computing Science, Tokyo Institute of Technology, Japan === Program committee === Carl Friedrich Bolz, King's College London, United Kingdom Gilad Bracha, Google, United States Andrew Bragdon, Twitter, United States Jonathan Edwards, CDG Labs, United States Jun Kato, National Institute of Advanced Industrial Science and Technology, Japan Cristina Videira Lopes, University of California at Irvine, United States Yoshiki Ohshima, Viewpoints Research Institute, United States Michael Perscheid, SAP Innovation Center, Germany Guido Salvaneschi, TU Darmstadt, Germany Marcel Taeumel, Hasso Plattner Institute, University of Potsdam, Germany Alessandro Warth, SAP Labs, United States

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Contribute in GSOC
by Ishan Khare 10 Mar '16

10 Mar '16

Hi, I am a newcomer to contributing to pypy, but I'm fairly good in python & c. I would like to contribute to PyPy. Are all ideas listed in Potential project list <http://doc.pypy.org/en/latest/project-ideas.html#potential-project-list> eligible for GSOC. Where should I probably get started? Regards, Ishan

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Interest in contributing to PYPY
by Djimeli Konrad 10 Mar '16

10 Mar '16

Hello, My name is Djimeli Konrad a second year computer science student from the University of Buea, Cameroon. I am proficient in c, c++, javascript and python. I would like to contribute to PYPY for the Google Summer of Code 2016. I am interested in working on the project "Improving the jitviewer". I have previous experience developing Django/Python applications ( https://github.com/MCQuizzer/mcquizzer/graphs/contributors ), VRML-STL parser hosted on github ( https://github.com/djkonro/vrml-stl ) and other project ( https://github.com/djkonro ). I would like to work on this project within and beyond GSoC and as I have always sought for such a project ever since I learned python and web application development.I would like to get some pointer to some starting point that could give me a better understanding of the project. Thanks Konrad

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