[SciPy-dev] Inclusion of cython code in scipy
Thu Apr 24 11:19:01 CDT 2008
On Thu, Apr 24, 2008 at 9:59 AM, Neal Becker <email@example.com> wrote:
> Brian Granger wrote:
> >> Then why not start a project to get SWIG to do away with the shadow
> >> module?
> > I don't have a passion for actually working seriously on these
> > projects - I am lazy and simply want to use them :)
> >> Lets take a simple case of someone wanting to handle a growing
> >> collection of say a million particles and do something to them. How do
> >> you do that in cython/pyrex and get the performance of C and interface
> >> to numpy? Worse, even if it were possible, you'll still need to know
> >> something about allocating memory in C and manipulating pointers. I can
> >> do that with C++ and SWIG today.
> > C++ STL containers are truly great for things like this. I would
> > write a simple c++ header file that defines the Particle class, create
> > an std::vector<Particle> to hold them and wrap the whole thing into
> > Cython. I have already done stuff like this (templated c++ with STL)
> > with cython and it works great. Furthermore, you end up with an
> > actual C/Python extension type that 1) is super fast 2) has its own C
> > api that can be called from other C extensions.
Unfortunately, the context I have done this in is proprietary code for
my employer. But, I will try to put together a simple example this
weekend and post it to launchpad. The documentation on these
capabilities of Cython isn't great right now for sure, so some example
code would sure help.
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