Mailman 3 October 2015 - pypy-dev

About gurobipy
by Luis José Novoa 31 May '18

31 May '18

Hi All, My name is Luis Novoa. Im working on a large scale optimization problem using python/gurobipy for my implementation. I was wondering if any of you in this list has used gurobipy with pypy, or if it is even possible at this time. Thanks in advance, Luis.

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Looking for clues to consistent Seg Fault in PyPy 2.6.1
by Jeff Doran 17 Feb '16

17 Feb '16

Hi, I've run out of options trying to find a Seg Fault which happens when running lxml under PyPy 2.6.1. This problem only occurs under PyPy as the rest of the code works fine under CPython 2.7. I've been in contact with the lxml dev team and they confirmed my problem, but could not determine where the cause of the Seg Fault lies. They suggested reaching out to you folks for ideas or a possible work around as the stack trace is always in libpypy-c.so and seems to be triggered by eventual garbage collection. Below is the gist of the email I sent to the lxml team earlier. It describes my ability to reproduce this Seg Fault using their supplied test suite. As of this writing, lxml is at version 3.5.0b1. I'd appreciate any feedback you might supply on how to deal with this error. Seg Faults are notoriously hard to find since they inevitably happen upstream for the crash. We are anxious to perform a complete evaluation of transitioning to PyPy as our Python platform of choice and this appears to be the last major blockage. Thanks for your help. - Jeff Doran ---------------- I'm running the lxml test suite under PyPy which I installed from here,https://bitbucket.org/squeaky/portable-pypy/downloads/pypy-2.6.1-linux… . I've downloaded the current lxml src from https://github.com/lxml/lxml. I built lxml using 'python setup.py build --with-cython' *From ..lxml/src/lxml I run: * nosetests -v --pdb --nocapture Comparing with ElementTree 1.3.0 Comparing with cElementTree 1.3.0 TESTED VERSION: 3.5.0.beta1 Python: (major=2, minor=7, micro=10, releaselevel='final', serial=42) lxml.etree: (3, 5, 0, -99) libxml used: (2, 8, 0) libxml compiled: (2, 8, 0) libxslt used: (1, 1, 26) libxslt compiled: (1, 1, 26) lxml.html.tests.test_autolink.test_suite ... ok lxml.html.tests.test_basic.test_suite ... ok test_allow_tags (lxml.html.tests.test_clean.CleanerTest) ... ok test_clean_invalid_root_tag (lxml.html.tests.test_clean.CleanerTest) ... ok test_safe_attrs_excluded (lxml.html.tests.test_clean.CleanerTest) ... ok test_safe_attrs_included (lxml.html.tests.test_clean.CleanerTest) ... ok lxml.html.tests.test_clean.test_suite ... ok lxml.html.tests.test_diff.test_suite ... ok test_body (lxml.html.tests.test_elementsoup.SoupParserTestCase) ... ok test_broken_attribute (lxml.html.tests.test_elementsoup.SoupParserTestCase) ... fish: Job 1, “nosetests -v --pdb --nocapture” terminated by signal SIGSEGV (Address boundary error) ``` Running these tests under gdb reveals the following partial stack trace: #0 0x00007ffff57fa08a in ?? () from /home/jeff/debian_pypy_env/bin/libpypy-c.so #1 0x00007ffff57fa110 in ?? () from /home/jeff/debian_pypy_env/bin/libpypy-c.so #2 0x00007ffff5776be3 in PyPyWeakref_LockObject () from /home/jeff/debian_pypy_env/bin/libpypy-c.so #3 0x00007ffff0337399 in __pyx_f_4lxml_5etree__isProxyAliveInPypy.isra.265 () from /home/jeff/lxml/src/lxml/etree.pypy-26.so #4 0x00007ffff033fbfb in __pyx_f_4lxml_5etree_attemptDeallocation () from /home/jeff/lxml/src/lxml/etree.pypy-26.so #5 0x00007ffff033fd70 in __pyx_tp_dealloc_4lxml_5etree__Element () from /home/jeff/lxml/src/lxml/etree.pypy-26.so #6 0x00007ffff62186f9 in ?? () from /home/jeff/debian_pypy_env/bin/libpypy-c.so #7 0x00007ffff57aec90 in ?? () from /home/jeff/debian_pypy_env/bin/libpypy-c.so #8 0x00007ffff57fa670 in ?? () from /home/jeff/debian_pypy_env/bin/libpypy-c.so #9 0x00007ffff5fa0da8 in ?? () from /home/jeff/debian_pypy_env/bin/libpypy-c.so #10 0x00007ffff5f89a31 in ?? ()

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Diploma Thesis on Pypy
by George Papanikolaou 01 Nov '15

01 Nov '15

Hello, I'm a CS student at the University of Patras in Greece, and I'm really interested in doing my thesis on programming language theory, compilers JIT optimization etc. I find your project really interesting and I'd like you to advice me if there is any potential for my thesis here. A contribution maybe. Is it feasible? Thanks in advance for all answers and considerations, George -- George 'papanikge' Papanikolaou

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PyPy 15.11 release is imminent
by Matti Picus 27 Oct '15

27 Oct '15

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Any Release incoming for pypy 3.x?
by Phyo Arkar 23 Oct '15

23 Oct '15

I am waiting to switch to Python3 , but i am not switching without pypy3 moving forward

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PyPy doesn't implement the most important module!
by Ryan Gonzalez 22 Oct '15

22 Oct '15

ryan@DevPC-LX:~$ ipython Python 2.7.6 (default, Mar 22 2014, 22:59:56) Type "copyright", "credits" or "license" for more information. IPython 1.1.0 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use 'object??' for extra details. In [1]: import __hello__ Hello world... In [2]: Do you really want to exit ([y]/n)? y ryan@DevPC-LX:~$ pypy-ipython Python 2.7.8 (1a994c305af0, Nov 15 2014, 00:43:41) Type "copyright", "credits" or "license" for more information. IPython 4.0.0 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use 'object??' for extra details. In [1]: import __hello__ --------------------------------------------------------------------------- ImportError Traceback (most recent call last) <ipython-input-1-e4fe6d53f662> in <module>() ----> 1 import __hello__ ImportError: No module named __hello__ In [2]: Do you really want to exit ([y]/n)? y ryan@DevPC-LX:~$ -- Ryan [ERROR]: Your autotools build scripts are 200 lines longer than your program. Something’s wrong. http://kirbyfan64.github.io/

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Please try the PyPy 4.0.0 release candidates
by Matti Picus 21 Oct '15

21 Oct '15

The first translation of the upcoming PyPy 4.0.0 release is now available at http://buildbot.pypy.org/nightly/release-4.0.x Also, contributions to the release notice would be appreciated, it can be found at http://pypy.readthedocs.org/en/latest/release-4.0.0.html and the source at https://bitbucket.org/pypy/pypy/src/default/pypy/doc/release-4.0.0.rst Thanks Matti

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Automatic SIMD vectorization
by Tuom Larsen 20 Oct '15

20 Oct '15

Hello all! I just read with great interest the blog post "Automatic SIMD vectorization support in PyPy". Please, I have a few questions: - Does regular Python code benefit from the vectorization? I mean, the article on one hand says "it is not specifically targeted for the NumPy library" but on the other it says "Any interpreter (written in RPython)". - I would like to write a vector class as much suitable for PyPy as possible, what approach should I take in order to implement it? For example, what would suit PyPy JIT the best: class Vector3d: def __init__(a, x, y, z): (a.x, a.y, a.z) = x, y, z def __add__(a, b): return Vector3d(a.x + b.x, a.y+b.y, a.z+b.z) def add1(a, b): (ax, ay, az) = a (bx, by, bz) = b return [ax + bx, ay + by, az + bz] def add2(a, b): (ax, ay, az) = a (bx, by, bz) = b return (ax + bx, ay + by, az + bz) def add3((ax, ay, az), (bx, by, bz)): return (ax + bx, ay + by, az + bz) def add3: ??? - Is NumPyPy going to be included with regular PyPy download/install? Thanks a lot in advance!

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[mdione@grulic.org.ar: modifying locals]
by Marcos Dione 17 Oct '15

17 Oct '15

Forwarding as suggested in python-list... ----- Forwarded message from Marcos Dione <mdione(a)grulic.org.ar> ----- Date: Sun, 11 Oct 2015 15:30:05 +0200 From: Marcos Dione <mdione(a)grulic.org.ar> Subject: modifying locals To: help(a)python.org Message-ID: <20151011133005.GC2798(a)diablo.grulicueva.local> Content-Type: text/plain; charset=us-ascii First of all, I'm not subscribed to the list, so please CC me. I'm writing a language[1] heavily based on Python. The way I'm implementing it is by having my own parser (based/stolen from pypy), obtaining an AST, modifying it and running the result with Python3's exec(). One of its particular features is that I intend to support semi-transparent remote execution using paramiko. For that, there is a construction that looks like this: [local code 1] with remote(...): [remote code] [local code 2] The idea is that [remote code] is effectively executed in a remote machine specified in remote()'s parameters. This is implemented[3] by remote() being a context manager. Part of the transparency is that globals and locals at the remote() point will be accesible to the remote code (so far only variables), and that modifications to locals will be visible back to [local code 2]. So far I managed to do the first part, but not the second. I managed to transfer the locals back from the remote. My problem is modifying the locals in remote()'s __exit__() method. As I'm running the code using exec(), it's not just a matter of modifying locals()[2]. What I tried was the following: * When I execute the code, I pass an empty dictionary to hold the locals. I save a reference to it, and I try to use it to modify the locals [local code 2] sees, but as locals are related to stack frame, it doesn't work. * This leads to the second attempt: use the stack to modify remote()'s caller's locals by[4]: inception_locals= sys._getframe().f_back.f_locals inception_locals.update (locals) Somehow this doesn't work either, and it's driving me crazy. I run out of ideas, so maybe you could throw some? Thanks in advance. -- [1] if you're interested, check https://github.com/StyXman/ayrton/ [2] isn't it? Just by writing that I got my doubts... [3] https://github.com/StyXman/ayrton/blob/develop/ayrton/functions.py#L112 [4] https://github.com/StyXman/ayrton/blob/develop/ayrton/functions.py#L254 -- (Not so) Random fortune: They called me mad, and I called them mad, and damn them, they outvoted me. -- Nathaniel Lee ----- End forwarded message ----- -- (Not so) Random fortune: 20:45 < perrito666> la_rayis: la esperanza es lo ultimo que se pierde 20:45 * perrito666 se aferra a eso o ya estaria casado

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"PyPy lets us go where we need to"
by Tuom Larsen 16 Oct '15

16 Oct '15

Dead list, not sure if this is the right place to share but there is a presentation by a Mozilla dev being currently discussed on Reddit where PyPy received quite some praise: https://www.reddit.com/r/golang/comments/3oztwi/from_python_to_go_and_back_… Cheers!

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