old_contents: #! /usr/bin/env python
  # -*- mode: python; coding: utf-8 -*-
  # Copyright 2017 the HERA Collaboration
  # Licensed under the 2-clause BSD license.
  
  """
  Finds node for antenna numbers.
  """
  from __future__ import absolute_import, division, print_function
  import argparse
  from hera_mc import cm_sysutils
  
  
  parser = argparse.ArgumentParser()
  parser.add_argument('ants', help="Antennas (csv-list).")
  args = parser.parse_args()
  
  ant_node = cm_sysutils.which_node(args.ants)
  cm_sysutils.print_which_node(ant_node)
  
new_contents: #! /usr/bin/env python
  # -*- mode: python; coding: utf-8 -*-
  # Copyright 2017 the HERA Collaboration
  # Licensed under the 2-clause BSD license.
  
  """
  Finds node for antenna numbers.
  """
  import argparse
  from hera_mc import cm_sysutils
  
  
  parser = argparse.ArgumentParser()
  parser.add_argument('ants', help="Antennas (csv-list).")
  args = parser.parse_args()
  
  ant_node = cm_sysutils.which_node(args.ants)
  cm_sysutils.print_which_node(ant_node)
  
subject: remove __future__ import from new script