old_contents: #!/usr/bin/env python
  
  from distutils.core import setup
  from distutils.extension import Extension
  from Cython.Distutils import build_ext
  from Cython.Build import cythonize
  import numpy
  
  cythonize("pySINGLE/Z_shooting.pyx")
  
  setup(name='pySINGLE',
      packages = ['pySINGLE'],
      version='0.5',
      description = 'Python implementation of SINGLE algorithm',
      author = 'Ricardo Pio Monti',
      author_email = 'ricardo.monti08@gmail.com',
      url = 'https://github.com/piomonti/pySINGLE',
      download_url = 'https://github.com/piomonti/pySINGLE/tarball/0.1',
      #cmdclass = {'build_ext': build_ext},
      #ext_modules = [Extension("Z_shooting", ['pySINGLE/Z_shooting.c'])],
      #include_dirs=[numpy.get_include(),'.', ]
  )
new_contents: #!/usr/bin/env python
  
  from distutils.core import setup
  from distutils.extension import Extension
  from Cython.Distutils import build_ext
  from Cython.Build import cythonize
  import numpy
  
  cythonize("pySINGLE/FastFused_01.pyx")
  
  setup(name='pySINGLE',
      packages = ['pySINGLE'],
      version='0.5',
      description = 'Python implementation of SINGLE algorithm',
      author = 'Ricardo Pio Monti',
      author_email = 'ricardo.monti08@gmail.com',
      url = 'https://github.com/piomonti/pySINGLE',
      download_url = 'https://github.com/piomonti/pySINGLE/tarball/0.1',
      cmdclass = {'build_ext': build_ext},
      ext_modules = [Extension("FastFused_01", ['pySINGLE/FastFused_01.c'])],
      include_dirs=[numpy.get_include(),'.', ]
  )
  
subject: Correct mistakes