old_contents: #put executables here
  
new_contents: # -*- coding:utf-8 -*-
  from __future__ import absolute_import, print_function, division
  
  from .classifier_characteristics import ClassifierCharacteristics
  from .preparation import prepare_data, shrink_data, convert_and_remove_non_finites
  
subject: add imports for subpackage ClassifierCharacteristics and preparation