old_contents: #!/usr/bin/env python
  #  -*- coding: iso-8859-1 -*-
  # Copyright (C) 2007-2013  CEA/DEN, EDF R&D, OPEN CASCADE
  #
  # Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
  # CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
  #
  # This library is free software; you can redistribute it and/or
  # modify it under the terms of the GNU Lesser General Public
  # License as published by the Free Software Foundation; either
  # version 2.1 of the License.
  #
  # This library is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  # Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this library; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  #
  # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  #
  
  import os
  
  def get_appli_path(filePath=None):
      if filePath is None:
          filePath = os.path.realpath(os.path.dirname(__file__))
  
      homePath = os.path.realpath(os.getenv('HOME'))
      applipath = os.path.relpath(filePath, homePath)
      return applipath
  
  if __name__ == "__main__":
      applipath = get_appli_path()
      print applipath
  
new_contents: #!/usr/bin/env python
  #  -*- coding: iso-8859-1 -*-
  # Copyright (C) 2007-2013  CEA/DEN, EDF R&D, OPEN CASCADE
  #
  # Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
  # CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
  #
  # This library is free software; you can redistribute it and/or
  # modify it under the terms of the GNU Lesser General Public
  # License as published by the Free Software Foundation; either
  # version 2.1 of the License.
  #
  # This library is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  # Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this library; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  #
  # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  #
  
  import os
  import sys
  
  ######
  # Warning: relpath might be replaced by equivalent os.relpath introduced in
  # Python 2.6 (Calibre 7).
  # It is still here to ensure compatibility with Calibre 6 (Python 2.5)
  def relpath(target, base):
      """ Find relative path from base to target
          if target== "/local/chris/appli" and base== "/local/chris" the result is appli
          if target== /tmp/appli and base /local/chris the result is ../../tmp/appli
      """
      target=target.split(os.path.sep)
      base=base.split(os.path.sep)
      for i in xrange(len(base)):
        if base[i] != target[i]:
          i=i-1
          #not in base
          break
      p=['..']*(len(base)-i-1)+target[i+1:]
      if p == []:
        return '.'
      return os.path.join( *p )
  #
  
  def get_appli_path(filePath=None):
      if filePath is None:
          filePath = os.path.realpath(os.path.dirname(__file__))
  
      homePath = os.path.realpath(os.getenv('HOME'))
      applipath = os.path.relpath(filePath, homePath)
      return applipath
  #
  
  if __name__ == "__main__":
      if sys.hexversion < 0x02060000: # Python older than 2.6.0
          applipath = relpath(os.path.realpath(os.path.dirname(__file__)),os.path.realpath(os.getenv('HOME')))
      else:
          applipath = get_appli_path()
      print applipath
  #
  
subject: Fix bug to ensure compatibility with Python < 2.6