old_contents: import os
  
  def configuration(parent_package='', top_path=None):
      from numpy.distutils.misc_util import Configuration
      import numpy
  
      libraries = []
      if os.name == 'posix':
          libraries.append('m')
  
      config = Configuration('Orange', parent_package, top_path)
      config.add_subpackage('classification')
      config.add_subpackage('data')
      config.add_subpackage('evaluation')
      config.add_subpackage('feature')
      config.add_subpackage('misc')
      config.add_subpackage('statistics')
      config.add_subpackage('testing')
      config.add_subpackage('tests')
  
      return config
  
  if __name__ == '__main__':
      from numpy.distutils.core import setup
      setup(**configuration(top_path='').todict())
  
new_contents: import os
  
  def configuration(parent_package='', top_path=None):
      from numpy.distutils.misc_util import Configuration
      import numpy
  
      libraries = []
      if os.name == 'posix':
          libraries.append('m')
  
      config = Configuration('Orange', parent_package, top_path)
      config.add_subpackage('classification')
      config.add_subpackage('data')
      config.add_subpackage('evaluation')
      config.add_subpackage('feature')
      config.add_subpackage('misc')
      config.add_subpackage('preprocess')
      config.add_subpackage('statistics')
      config.add_subpackage('testing')
      config.add_subpackage('tests')
  
      return config
  
  if __name__ == '__main__':
      from numpy.distutils.core import setup
      setup(**configuration(top_path='').todict())
  
subject: Add preprocess subpackage in Orange.setup.