new_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  from __future__ import absolute_import, unicode_literals, print_function, division
  
  import sys
  
  if sys.version_info[0] < 3:
      PY3, Unicode, Bytes = False, unicode, str
  else:
      PY3, Unicode, Bytes = True, str, bytes
  
  to_bytes = lambda v, e="utf-8": v.encode(e) if isinstance(v, Unicode) else v
  to_unicode = lambda v, e="utf-8": v.decode(e) if isinstance(v, Bytes) else v
  to_str = to_unicode if PY3 else to_bytes
  
subject: Add python utils example