setup.py

#from distutils.core import setup
from setuptools import setup
from distutils.extension import Extension

try:
    from Cython.Distutils import build_ext
except ImportError:
    use_cython = False
else:
    use_cython = True

def execfile3(file, globals=globals(), locals=locals()):
    with open(file, "r") as fh:
        exec(fh.read()+"\n", globals, locals)

execfile3('sppy/version.py')

cmdclass = { }

if use_cython:
    ext_modules=[Extension("sppy.csarray", ["sppy/csarray.pyx"], language="c++")] 
    ext_modules.append(Extension("sppy.csarray_sub", ["sppy/csarray_sub.pyx"], language="c++")) 
    ext_modules.append(Extension("sppy.csarray1d_sub", ["sppy/csarray1d_sub.pyx"], language="c++")) 
    cmdclass.update({ 'build_ext': build_ext })
else:
    ext_modules = [Extension("sppy.csarray", [ "sppy/csarray.cpp" ]), Extension("sppy.csarray_sub", ["sppy/csarray_sub.cpp"]), Extension("sppy.csarray1d_sub", ["sppy/csarray1d_sub.cpp"])] 

setup(name = 'sppy',
      version = __version__,
      author = 'Charanpal Dhanjal',
      author_email = 'charanpal@gmail.com',
      packages = ['sppy', 'sppy.test'],
      install_requires=['numpy>=1.5.0'],
      url = 'http://packages.python.org/sppy/',
      license = 'GNU Library or Lesser General Public License (LGPL)',
      platforms=["OS Independent"],
      keywords=['numpy', 'sparse matrix'],
      long_description= 'A sparse matrix library based on Eigen.',
      classifiers=[
        'Development Status :: 4 - Beta',
        'Intended Audience :: Developers',
        'License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)',
        'Operating System :: OS Independent',
        'Programming Language :: Python',
        ],
      ext_modules=ext_modules, 
      cmdclass=cmdclass)