old_contents: # exceptions.py - collection of pskc exceptions
  # coding: utf-8
  #
  # Copyright (C) 2014 Arthur de Jong
  #
  # 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, or (at your option) any later version.
  #
  # 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., 51 Franklin Street, Fifth Floor, Boston, MA
  # 02110-1301 USA
  
  """Collection of exceptions."""
  
  
  class PSKCError(Exception):
      """General top-level exception."""
  
      def __str__(self):
          return getattr(self, 'message', '')
  
  
  class ParseError(PSKCError):
      """Something went wrong with parsing the PSKC file.
  
      Either the file is invalid XML or required elements or attributes are
      missing."""
      pass
  
  
  class EncryptionError(PSKCError):
      """There was a problem encrypting the value."""
      pass
  
  
  class DecryptionError(PSKCError):
      """There was a problem decrypting the value.
  
      The encrypted value as available but something went wrong with decrypting
      it."""
      pass
  
  
  class KeyDerivationError(PSKCError):
      """There was a problem performing the key derivation."""
      pass
  
new_contents: # exceptions.py - collection of pskc exceptions
  # coding: utf-8
  #
  # Copyright (C) 2014 Arthur de Jong
  #
  # 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, or (at your option) any later version.
  #
  # 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., 51 Franklin Street, Fifth Floor, Boston, MA
  # 02110-1301 USA
  
  """Collection of exceptions."""
  
  
  class PSKCError(Exception):
      """General top-level exception."""
      pass
  
  
  class ParseError(PSKCError):
      """Something went wrong with parsing the PSKC file.
  
      Either the file is invalid XML or required elements or attributes are
      missing."""
      pass
  
  
  class EncryptionError(PSKCError):
      """There was a problem encrypting the value."""
      pass
  
  
  class DecryptionError(PSKCError):
      """There was a problem decrypting the value.
  
      The encrypted value as available but something went wrong with decrypting
      it."""
      pass
  
  
  class KeyDerivationError(PSKCError):
      """There was a problem performing the key derivation."""
      pass
  
subject: Remove __str__ from exception