old_contents: # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    PAIN Base module for OpenERP
  #    Copyright (C) 2013 Akretion (http://www.akretion.com)
  #    @author: Alexis de Lattre <alexis.delattre@akretion.com>
  #
  #    This program is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU Affero General Public License as
  #    published by the Free Software Foundation, either version 3 of the
  #    License, or (at your option) any later version.
  #
  #    This program 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 Affero General Public License for more details.
  #
  #    You should have received a copy of the GNU Affero General Public License
  #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  #
  ##############################################################################
  
  from openerp.osv import orm, fields
  
  
  class PaymentLine(orm.Model):
      _inherit = 'payment.line'
  
      def _get_struct_communication_types(self, cr, uid, context=None):
          return [('ISO', 'ISO')]
  
      _columns = {
          'priority': fields.selection(
              [('NORM', 'Normal'),
               ('HIGH', 'High')], 'Priority',
              help="This field will be used as the 'Instruction Priority' in "
                   "the generated PAIN file."),
          # Update size from 64 to 140, because PAIN allows 140 caracters
          'communication': fields.char(
              'Communication', size=140, required=True,
              help="Used as the message between ordering customer and current "
              "company. Depicts 'What do you want to say to the recipient "
              "about this order ?'"),
          'struct_communication_type': fields.selection(
              lambda self, *args, **kwargs:
                  self._get_struct_communication_types(*args, **kwargs),
              'Structured Communication Type'),
      }
  
      _defaults = {
          'priority': 'NORM',
          'struct_communication_type': 'ISO',
      }
  
new_contents: # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    PAIN Base module for OpenERP
  #    Copyright (C) 2013 Akretion (http://www.akretion.com)
  #    @author: Alexis de Lattre <alexis.delattre@akretion.com>
  #
  #    This program is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU Affero General Public License as
  #    published by the Free Software Foundation, either version 3 of the
  #    License, or (at your option) any later version.
  #
  #    This program 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 Affero General Public License for more details.
  #
  #    You should have received a copy of the GNU Affero General Public License
  #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  #
  ##############################################################################
  
  from openerp.osv import orm, fields
  
  
  class PaymentLine(orm.Model):
      _inherit = 'payment.line'
  
      def _get_struct_communication_types(self, cr, uid, context=None):
          return [('ISO', 'ISO')]
  
      _columns = {
          'priority': fields.selection(
              [('NORM', 'Normal'),
               ('HIGH', 'High')], 'Priority',
              help="This field will be used as the 'Instruction Priority' in "
                   "the generated PAIN file."),
          # Update size from 64 to 140, because PAIN allows 140 caracters
          'communication': fields.char(
              'Communication', size=140, required=True,
              help="Used as the message between ordering customer and current "
              "company. Depicts 'What do you want to say to the recipient "
              "about this order ?'"),
          'struct_communication_type': fields.selection(
              '_get_struct_communication_types',
              'Structured Communication Type'),
      }
  
      _defaults = {
          'priority': 'NORM',
          'struct_communication_type': 'ISO',
      }
  
subject: use new style to make selection extendable