Mailman 3 October 2018 - pypy-dev

save the date: PyPy Sprint in Düsseldorf February 4-9, 2019
by Carl Friedrich Bolz-Tereick 26 Jan '19

26 Jan '19

Hi all, I'll do a more proper sprint announcement soon, but to give some advance warning, I am organizing a PyPy sprint at the Heinrich-Heine-Universität Düsseldorf from February 4-9, 2019 (both days inclusive). The last sprint we had there was in 2010 :-). Cheers, Carl Friedrich

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Best way to inline a primitive array in RPython?
by Timothy Baldridge 30 Oct '18

30 Oct '18

Looking at rbuffer, rgc, and the lltype namespaces, it's not completely clear to me how I would go about writing a struct with a resizable primitive array inlined. Something like: typedef struct foo_t { int a, b; int _data[0]; } foo_t tmp = malloc(sizeof(foo_t) + 64); I can see that the GC has the ability to allocate "extra" memory beyond what's required for a struct, and that lltype has the ability to inline some lists into a struct, but how does this work in practice? And maybe I'm missing something in the docs, so simply pointing me to some docs is also fine. -- “One of the main causes of the fall of the Roman Empire was that–lacking zero–they had no way to indicate successful termination of their C programs.” (Robert Firth)

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PyPy 3 for Windows 64-bit systems - no download link available
by norbert.raimund.leisner＠arcor.de 28 Oct '18

28 Oct '18

Hello support-team, it is a computerchess-related topic e.g. running Python 0.99.3 https://github.com/pychess/pychess/releases/download/0.99.3/pychess-engine-… outsite its own graphical user interface https://github.com/pychess/pychess/releases/download/0.99.3/pychess-0.99.3-… on an external front-end like WinBoard Interface http://www.open-aurec.com/wbforum/viewtopic.php?f=19&t=51528 http://www.open-aurec.com/wbforum/viewtopic.php?f=19&t=51528 with protocol CECP http://hgm.nubati.net/CECP.html A detailed description (with all necessary configurations) how to accomplish this problem is hosted on my Google Drive chess collection https://drive.google.com/drive/folders/0B5Ao6h_yMCl6ay04RjVtUDVTUG8 > folder Pychess_20180928 Günther Simon from Germany http://www.rwbc-chess.de/ http://www.rwbc-chess.de/ reported that PyPy for Windows caused problems to run PyChess engine in contrast to WinPython or Python for Windows 3. Best wishes, Norbert PyChess 0.99.3 - WinBoard GUI * Download WinPython 3.6.30Qt5 x64 (390 MB) https://github.com/winpython/winpython/releases/download/1.9.20171031/WinPy… https://github.com/winpython/winpython/releases/download/1.9.20171031/WinPy… and install it on a drive e.g. C:\ This procedure can take more than 30 minutes. * Create a directory on C:\Engines\WB\PyChess_20180928 with the following working components: > InBetween (configuration settings) > PyChess_20180928 Editor (text document) > PyChess_20180928 = renamed InBetween http://web.archive.org/web/20100922051419/http://home.online.no/~malin/sjak… http://web.archive.org/web/20100922051419/http://home.online.no/~malin/sjak… > PyChess Zip application * Run WinBoard GUI > Load first engine > PyChess_20180928.exe (without any commandline-parameters) under protocol WB-2 It will not run with PyPy https://pypy.org/download.html https://pypy.org/download.html on Windows, because there are only 32-bit PyPy installs for Windows available, while at least latest pychess.pyz seems to rely on some 64-bit Python stuff, which throws some known exceptions (according to Günther´s Google research) in this case.

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PyCXX and PyPy status
by Barry Scott 27 Oct '18

27 Oct '18

I'm the maintainer of the PyCXX C++ extension interface to Python C API. PyCXX source code is a SVN repo at: https://svn.code.sf.net/p/cxx/code/trunk/CXX I have been working to get PyCXX to build and run against PyPy C API. I am happy to have PyPy specific code in PyCXX where necessary. Using PyPy 0.6.0 on macOS I managed to build a .so that crashed when imported. The reason is that the PyPy's C API does not allow tuples to be created. The pattern in CPython is like this: explicit Tuple (const Sequence& s) { sequence_index_type limit( sequence_index_type( s.length() ) ); set(PyTuple_New (limit), true); validate(); for(sequence_index_type i=0; i < limit; i++) { if(PyTuple_SetItem (ptr(), i, new_reference_to(s[i])) == -1) { ifPyErrorThrowCxxException(); } } } The PyTuple_SetItem() always fails. Its a must have to create tuples. How do you expect a tuple to be created? I have a build of the tip from the PyPy HG repo. This has regressed from the 0.6.0 release: g++ -c -g -Wall -fPIC -fexceptions -frtti -I. -ISrc -I/home/barry/tmpdir/usession-default-barry/build/pypy-qqq/include -DNDEBUG -oobj/simple.obj Demo/Python2/simple.cxx In file included from ./CXX/Objects.hxx:40, from Demo/Python2/simple.cxx:15: ./CXX/Python2/Objects.hxx: In member function ‘void Py::MapBase<T>::delItem(const string&)’: ./CXX/Python2/Objects.hxx:3041:17: error: there are no arguments to ‘PyMapping_DelItemString’ that depend on a template parameter, so a declaration of ‘PyMapping_DelItemString’ must be available [-fpermissive] if (PyMapping_DelItemString (ptr(), const_cast<char*>(s.c_str())) == -1) ^~~~~~~~~~~~~~~~~~~~~~~ ./CXX/Python2/Objects.hxx:3041:17: note: (if you use ‘-fpermissive’, G++ will accept your code, but allowing the use of an undeclared name is deprecated) ./CXX/Python2/Objects.hxx: In member function ‘void Py::MapBase<T>::delItem(const Py::Object&)’: ./CXX/Python2/Objects.hxx:3049:17: error: there are no arguments to ‘PyMapping_DelItem’ that depend on a template parameter, so a declaration of ‘PyMapping_DelItem’ must be available [-fpermissive] if (PyMapping_DelItem (ptr(), *s) == -1) ^~~~~~~~~~~~~~~~~ It seems that PyMapping_DelItem and PyMapping_DelString have been removed since 0.6.0. Can they be restored? Oh and where does the magic "44" come from that I had to use in the <extension>.pypy-44.so file name? Barry

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Re: [pypy-dev] Fwd: [#3588935] Re: PyPy 3 for Windows 64-bit systems
by Martin.Gfeller＠swisscom.com 25 Oct '18

25 Oct '18

Dear Brian The Wikipedia article seems to imply that using Cygwin as a compiler on Windows 64 would resolve the problem? Dear Armin, it can't be possibly that easy? Best regards Martin > Date: Tue, 23 Oct 2018 10:44:40 -0400 > From: Janzert <janzert(a)janzert.com> > To: pypy-dev(a)python.org > Subject: Re: [pypy-dev] PyPy 3 for Windows 64-bit systems - no download link available > Message-ID: <pqnc0i$151$1(a)blaine.gmane.org> > From what I understand the underlying cause is because 64bit windows (or more specifically the visual studio C compiler) uses an LLP64 > (IL32P64) data model* while most 64bit unix based systems use LP64 (I32LP64). > The previously linked article on getting a 64bit windows pypy talks about the size difference for long but doesn't spell out the data model explicitly. > Hopefully that helps clear up where the underlying issue comes from. > Brian Haskin > * https://en.wikipedia.org/wiki/64-bit_computing#64-bit_data_models

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Fwd: [#3588935] Re: PyPy 3 for Windows 64-bit systems - no download link available
by Barry 24 Oct '18

24 Oct '18

Each time i email pypy i get a email from this hosting company. Can you unsubscribe them? Barry Begin forwarded message: > From: support-level1(a)contact4.westhost.com > Date: 22 October 2018 at 22:37:31 BST > To: barry(a)barrys-emacs.org > Subject: [#3588935] Re: [pypy-dev] PyPy 3 for Windows 64-bit systems - no download link available > Reply-To: support-level1(a)contact4.westhost.com > > Hello, > > Thank you for contacting the WestHost Support Department. This message has been automatically generated in response to your e-mail regarding: "Re: [pypy-dev] PyPy 3 for Windows 64-bit systems - no download link available". Your request has been assigned a ticket number of [westhost.com #3588935]. A representative will be contacting you shortly. > > Please include this text: [westhost.com #3588935] in any future e-mails about this issue. You can also provide additional information on your request by simply replying to this message. > > WestHost Forums > ------------------------------------------- > While waiting for a response on your ticket, please take a look through our knowledge base at > http://kb.westhost.com/. We are continually improving it with a variety of walkthroughs and common resolutions! > > Although not an official support method, our WestHost Forums (http://forums.westhost.com/) remain a great resource for getting help from other WestHost clients. The Forums also provide a great medium for discussion on web hosting. > > We appreciate your patience while we respond to your e-mail ticket. Thank you for choosing WestHost. > > Best regards, > > WestHost Support Department > > When you expect more from your Web host > http://www.westhost.com/ > > >

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cppyy_backend logging issue
by Ivan Stepanov 24 Oct '18

24 Oct '18

cppyy doesn't work propertly. Traceback (most recent call last): File "/usr/lib/python3.7/site-packages/cppyy_backend/_cppyy_generator.py", line 692, in main mapping = g.create_mapping(args.sources) File "/usr/lib/python3.7/site-packages/cppyy_backend/_cppyy_generator.py", line 214, in create_mapping file_info = self.create_file_mapping(h_file) File "/usr/lib/python3.7/site-packages/cppyy_backend/_cppyy_generator.py", line 244, in create_file_mapping logger.log(m * diag.severity + c, "While parsing: {}".format(msg)) File "/usr/lib/python3.7/logging/__init__.py", line 1395, in log raise TypeError("level must be an integer") TypeError: level must be an integer System info: Manjaro (Arch linux) Python 3.7.0 CPyCppyy 1.3.6 cppyy 1.2.4 cppyy-backend 1.4.2 cppyy-cling 6.14.2.1 Possible solution: in file cppyy_backend/_cppyy_generator.py: - logger.log(m * diag.severity + c, "While parsing: {}".format(msg)) + logger.log(int(m * diag.severity + c), "While parsing: {}".format(msg))

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Difference to CPython (Maybe a bug in PyPy)
by Wiener, Markus 12 Oct '18

12 Oct '18

Hello, i found (maybe) a bug in PyPy. Try: > python python_vs_pypy.py and > pypy python_vs_pypy.py Regards, Markus Wiener

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