old_contents: from __future__ import (absolute_import, division,
                          print_function, unicode_literals)
  from builtins import *
  
  from datacheck.core import validate, Type, List, Required, Optional, Dict
  
  
  __all__ = [
      'validate',
      'Type',
      'List',
      'Required',
      'Optional',
      'Dict',
  ]
  
new_contents: from __future__ import (absolute_import, division,
                          print_function, unicode_literals)
  from builtins import *
  
  from datacheck.core import (validate, Validator, Type, List,
                              Required, Optional, Dict)
  
  
  __all__ = [
      'validate',
      'Validator',
      'Type',
      'List',
      'Required',
      'Optional',
      'Dict',
  ]
  
subject: update import