On Mar 18, 2011, at 9:59 PM, Tim Lahey wrote: > On 03-18-2011, at 11:49 PM, Aaron S. Meurer wrote: > >> On Mar 18, 2011, at 9:36 PM, Tim Lahey wrote: >> >>> Hi, >>> >>> I've been thinking about applying for GSoC and working on a Cython core. >>> I'm assuming that it would be an optional thing? So, there would be two >>> cores, an optimized one that's done in Cython and a pure Python one for >>> when Cython isn't available. >>> >>> Is the idea to update and clean up sympyx and properly integrate it into >>> sympy? >> >> Well, the hope is that we can use things like @cythonized decorators in the >> core, and make it just work either way (either it uses pure Python, or >> cython if the cython has been made). This is how the cython in the polys >> works right now. We will have to look at it to see if this will work for >> the core. Anyway, it would definitely be optional no matter how it is done, >> because we want people to be able to use SymPy using pure Python as the only >> dependency. > > So I guess looking at the polys branch (which is where exactly?) is a good > idea to see how they do it.
The cython stuff is already in the git master. See for example sympy/polys/densearith.py. The Makefile will give you more information on what happens with the Cython. Aaron Meurer > >> >> Also, it was my understanding that the core needs a lot of cleanup before it >> can be properly cythonized. In particular, the old assumptions have to be >> completely removed and replaced with the new ones. Others know more about >> the state of the core and could probably answer your questions better, >> though. > > I kind of guessed that the core would need to be cleaned up. Even if the work > doesn't get finished as part of GSoC, at least things would be further along. > So, if all I did was clean up the core and cythonize some of the core, things > would be better. > >> >>> >>> On a development note, is there a good way to have a separate python and >>> packages (e.g., a sympy fork and cython) so I don't mess up my system >>> python? I'm working on OS X, but I could install a Linux VM in Virtualbox >>> (if so, which Linux?). >>> >> >> If you are working on just SymPy, you can just work straight from the git >> repository. There is no need to install it. >> >> If you want to create a virtual environment with Python, you can use >> virtualenv. Maybe someone else here can explain how to use it better than I >> can (I am still new to it), but I think you basically type "virtualenv >> directory" and then install things using the virtual python installed in >> that directory (I think I might be missing a step or two here, so look at >> the docs before trying). >> >> Also, an alternative to the system Python on Mac OS X is to use fink. That >> is what I do. Everything is installed in /sw/, and if you screw up the >> installation, you can completely trash /sw/ and start again if you want (it >> is completely independent of the system stuff). > > > I'd rather not install Fink since I use Homebrew instead and I don't want > duplication of system packages (except Python), so I'll look at qsnake. > > I realize that this is a non-trivial task, but the last time someone looked > at this was June 2009 based upon Ondrej's repository. > > Someone has already done work on a new assumption system haven't they? I'm > guessing it just isn't complete or is it complete and just not integrated? > > Thanks, > > Tim. > > --- > Tim Lahey > PhD Candidate, Systems Design Engineering > University of Waterloo > http://about.me/tjlahey > > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to sympy@googlegroups.com. > To unsubscribe from this group, send email to > sympy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
