old_contents: from distutils.core import setup
  
  setup(name='mpmath',
        description = 'Python library for arbitrary-precision floating-point arithmetic',
        version='0.5',
        url='http://mpmath.googlecode.com',
        author='Fredrik Johansson',
        author_email='fredrik.johansson@gmail.com',
        license = 'BSD',
        packages=['mpmath', 'mpmath/lib'],
       )
  
new_contents: from distutils.core import setup
  
  setup(name='mpmath',
        description = 'Python library for arbitrary-precision floating-point arithmetic',
        version='0.5',
        url='http://mpmath.googlecode.com',
        author='Fredrik Johansson',
        author_email='fredrik.johansson@gmail.com',
        license = 'BSD',
        packages=['mpmath', 'mpmath/lib'],
        classifiers=['Topic :: Scientific/Engineering :: Mathematics']
       )
  
subject: include classifier in setup.py