old_contents: #!/usr/bin/env python
  
  from distutils.core import setup
  
  setup(name='mpmath',
        description = 'Python library for arbitrary-precision floating-point arithmetic',
        version='0.13',
        url='http://mpmath.googlecode.com',
        author='Fredrik Johansson',
        author_email='fredrik.johansson@gmail.com',
        license = 'BSD',
        packages=['mpmath', 'mpmath/tests'],
        classifiers=['Topic :: Scientific/Engineering :: Mathematics']
       )
  
new_contents: #!/usr/bin/env python
  
  from distutils.core import setup
  
  setup(name='mpmath',
        description = 'Python library for arbitrary-precision floating-point arithmetic',
        version='0.13',
        url='http://mpmath.googlecode.com',
        author='Fredrik Johansson',
        author_email='fredrik.johansson@gmail.com',
        license = 'BSD',
        packages=['mpmath',
                  'mpmath/libmp',
                  'mpmath/calculus',
                  'mpmath/functions',
                  'mpmath/matrices',
                  'mpmath/tests'],
        classifiers=['Topic :: Scientific/Engineering :: Mathematics']
       )
  
subject: Add subpackages to setup.py