old_contents: # -*- coding: utf-8 -*-
  """
      lantz
      ~~~~~
  
      An automation and instrumentation toolkit with a clean, well-designed and
      consistent interface.
  
      :copyright: 2015 by The Lantz Authors
      :license: BSD, see LICENSE for more details.
  """
  
new_contents: # -*- coding: utf-8 -*-
  """
      lantz_core
      ~~~~~~~~~~
  
      An automation and instrumentation toolkit with a clean, well-designed and
      consistent interface.
  
      :copyright: 2015 by The Lantz Authors
      :license: BSD, see LICENSE for more details.
  """
  from __future__ import (division, unicode_literals, print_function,
                          absolute_import)
  
  from .has_features import subsystem, channel, set_feat, set_action
  from .action import Action
  from .errors import LantzError
  from .limits import IntLimitsValidator, FloatLimitsValidator
  from .unit import set_unit_registry, get_unit_registry
  
  __all__ = ['subsystem', 'channel', 'set_action', 'set_feat', 'Action',
             'LantzError', 'set_unit_registry', 'get_unit_registry',
             'IntLimitsValidator', 'FloatLimitsValidator']
  
subject: Add some imports to __init__.py