old_contents: from __future__ import absolute_import
  from .ImSimDeep import *
  from .InstanceCatalogMaker import *
  from .instance_catalog_tools import *
  from .instcat_tools import InstcatTools_sky_cone_select as sky_cone_select
  from .instcat_tools import InstcatTools_ang_sep as ang_sep
  
new_contents: from __future__ import absolute_import
  from .ImSimDeep import *
  from .InstanceCatalogMaker import *
  from .instance_catalog_tools import *
  from .instcat_tools import InstcatTools_sky_cone_select as sky_cone_select
  from .instcat_tools import InstcatTools_ang_sep as ang_sep
  from .build_index_files import *
  
subject: update __init__.py for build_index_files module