On Thu, Sep 15, 2011 at 3:24 PM, Rajeev Singh <rajs2...@gmail.com> wrote: > On Thu, Sep 15, 2011 at 12:07 PM, Robert Bradshaw > <rober...@math.washington.edu> wrote: >> On Wed, Sep 14, 2011 at 2:31 AM, Rajeev Singh <rajs2...@gmail.com> wrote: >>> Hi, >>> >>> The following examples compiles from the notebook >>> >>> %cython >>> cimport sage.gsl.ode >>> import sage.gsl.ode >>> include 'gsl.pxi' >>> >>> cdef class van_der_pol(sage.gsl.ode.ode_system): >>> cdef double beta >>> def __cinit__(self, double beta=1.0): >>> self.beta = beta >>> cdef int c_f(self,double t, double *y,double *dydt): >>> dydt[0]=y[1] >>> dydt[1]=-y[0]-self.beta*y[1]*(y[0]*y[0]-1) >>> return GSL_SUCCESS >>> cdef int c_j(self, double t,double *y,double *dfdy,double *dfdt): >>> dfdy[0]=0 >>> dfdy[1]=1.0 >>> dfdy[2]=-2.0*10*y[0]*y[1]-1.0 >>> dfdy[3]=-10*(y[0]*y[0]-1.0) >>> dfdt[0]=0 >>> dfdt[1]=0 >>> return GSL_SUCCESS >>> >>> However if I put it in a file vander.pyx (say) and use the following >>> setup.py - >>> >>> from distutils.core import setup >>> from distutils.extension import Extension >>> from Cython.Distutils import build_ext >>> >>> ext = Extension("vander", ["vander.pyx"], >>> include_dirs = ['/home/rajeev/bin/sage/devel/sage-main/sage/gsl/']) >>> >>> setup(ext_modules=[ext], >>> cmdclass = {'build_ext': build_ext}) >>> >>> >>> I get the following error - >>> >>> cdef class van_der_pol(sage.gsl.ode.ode_system): >>> ^ >>> ------------------------------------------------------------ >>> >>> vander.pyx:10:5: 'ode_system' is not declared >>> >>> >>> I guess the problem is with the setup.py. Can someone tell me how to do >>> this? >> >> IIRC, the notebook %cython creates a setup.py--you could just look at >> that. Chances are your Extension object is missing include dirs and >> libraries. >> >> -Robert >> >> -- >> To post to this group, send email to sage-support@googlegroups.com >> To unsubscribe from this group, send email to >> sage-support+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/sage-support >> URL: http://www.sagemath.org >> > > Hi, > > The present script takes a pyx file as input and outputs a c, o and so > file in the same directory. The so can now be imported in a sage > program. I have already checked it and its seems to be working fine. I > did look at the commands generated by setup.py file to write this > script. > > Rajeev >
Hi, There is a better (safer I guess) way of doing the task using something called cython_create_local_so. The following command will do the job - sage -c "from sage.all import cython_create_local_so; cython_create_local_so('_laplace.pyx')" Rajeev -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org