Hi, On 18 March 2011 21:04, Aaron S. Meurer <asmeu...@gmail.com> wrote:
> > 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. > In polys this is *pure* Cython approach, i.e. no Cython source code, just compilation to native code of Python source code (less effort, less gain). > > 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. > > Mateusz -- 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.
