old_contents: from distutils.core import setup, Extension
  setup(
      ext_modules=[Extension("randomdict", ["random_weighted/randomdict.c"])]
  )
new_contents: from distutils.core import setup, Extension
  setup(
      py_modules =['weighted_dict'],
      ext_modules=[Extension("randomdict", ["random_weighted/randomdict.c"])]
  )
subject: fix module build