old_contents: from setuptools import setup
  from Cython.Build import cythonize
  
  setup(
      name='pyirt',
      version="0.2.5",
      packages=['pyirt',
                'pyirt/solver',
                'pyirt/utl', ],
      url='https://github.com/junchenfeng/pyirt',
      license='MIT',
      description='A python implementation of EM IRT, specializing in sparse massive data',
      author='Junchen Feng',
      author_email='frankfeng.pku@gmail.com',
      include_package_data=True,
      download_url='https://github.com/junchenfeng/pyirt/tarball/0.2.5',
      keywords=['IRT', 'EM', 'big data'],
      zip_safe=False,
      platforms='any',
      install_requires=['numpy',
                        'scipy',
                        'cython', ],
  
      package_data={'pyirt': ["*.pyx"]},
      ext_modules=cythonize('pyirt/utl/clib.pyx'),
  
      classifiers=[
          'Intended Audience :: Developers',
          'Operating System :: OS Independent',
          'Programming Language :: Python :: 2.7',
      ],
  )
  
new_contents: from setuptools import setup
  # from Cython.Build import cythonize
  
  setup(
      name='pyirt',
      version="0.2.5",
      packages=['pyirt',
                'pyirt/solver',
                'pyirt/utl', ],
      url='https://github.com/junchenfeng/pyirt',
      license='MIT',
      description='A python implementation of EM IRT, specializing in sparse massive data',
      author='Junchen Feng',
      author_email='frankfeng.pku@gmail.com',
      include_package_data=True,
      download_url='https://github.com/junchenfeng/pyirt/tarball/0.2.5',
      keywords=['IRT', 'EM', 'big data'],
      zip_safe=False,
      platforms='any',
      install_requires=['numpy',
                        'scipy',
                        'cython', ],
  
      package_data={'pyirt': ["*.pyx"]},
      # ext_modules=cythonize('pyirt/utl/clib.pyx'),
  
      classifiers=[
          'Intended Audience :: Developers',
          'Operating System :: OS Independent',
          'Programming Language :: Python :: 2.7',
      ],
  )
  
subject: Disable ext_modules in setup.py, cause ImportError: Building module pyirt.utl.clib failed: ['ImportError: /tmp/pyximport/lib.linux-x86_64-2.7/pyirt/utl/clib.so: file too short\n']