Here is an example setup.py which also shows how to include the math libray (-lm for gcc)

from distutils.core import setup from distutils.extension import Extension from Cython.Distutils import build_ext ext_modules = [Extension("BvL_cython",["BvL_cython.pyx"],\ libraries=["m"])] setup( name= 'BvL model class', cmdclass = {'build_ext': build_ext}, ext_modules = ext_modules )

The reason that I was interested in Cython was the long calculation times I encountered while doing a multi-variable optimization with a function evaluation that involved solving a differential equation with scipy.integrate.odeint. By simply replacing the class that contained the differential equation with a Cython version the calculation time dropped by a factor 5. Not bad for half a Sunday afternoons work.