setup.py

from distutils.core import setup
from distutils.extension import Extension
import os

on_rtd = os.environ.get('READTHEDOCS', None) == 'True'

if ('USE_CYTHON' in os.environ):
    USE_CYTHON = int(os.environ['USE_CYTHON'])
else:
    USE_CYTHON = False

ext = '.pyx' if USE_CYTHON else '.c'

if (not on_rtd):
    import numpy
    extensions = [Extension("pyparticleest.utils.ckalman", ["pyparticleest/utils/ckalman" + ext]),
                  Extension("pyparticleest.utils.cmlnlg_compute", ["pyparticleest/utils/cmlnlg_compute" + ext],
                            include_dirs=[numpy.get_include()])]
else:
    extensions = None

name = 'pyParticleEst'
version = '1.1.4'
packages = ['pyparticleest', 'pyparticleest/models', 'pyparticleest/paramest', 'pyparticleest/utils']
url = 'http://www.control.lth.se/Staff/JerkerNordh/pyparticleest.html'
author = 'Jerker Nordh'
author_email = 'ajn@ajn.se'
description = 'Framework for particle based estimation methods, such as particle filtering and smoothing'
lic = 'LGPL'

if USE_CYTHON:
    from Cython.Build import cythonize
    extensions = cythonize(extensions)


try:
    setup(name=name,
          version=version,
          packages=packages,
          url=url,
          author=author,
          author_email=author_email,
          description=description,
          license=lic,
          ext_modules=extensions,
          )
except SystemExit:
    setup(name=name,
          version=version,
          packages=packages,
          url=url,
          author=author,
          author_email=author_email,
          description=description,
          license=lic,
          )