old_contents: # -*- coding: utf-8 -*-
  
  from openerp import models, fields, api
  
  '''
  This module create model of Course
  '''
  
  class Course(models.Model):
      '''
      This class create model of Course
      '''
      _name = 'openacademy.course' # model odoo name
  
      name = fields.Char(string="Title", required=True)
      description = fields.Text()
      responsible_id = fields.Many2one('res.users', 
          ondelete='set null', string="Responsible", index=True)
      session_ids = fields.One2many('openacademy.session', 
          'course_id', string="Sessions")
  
      _sql_constraints = [
          ('name_description_check',
           'CHECK(name != description)',
           "The title of the course should not be the description"),
  
          ('name_unique',
           'UNIQUE(name)',
           "The course title must be unique"),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  
  from openerp import models, fields, api
  
  '''
  This module create model of Course
  '''
  
  class Course(models.Model):
      '''
      This class create model of Course
      '''
      _name = 'openacademy.course' # model odoo name
  
      name = fields.Char(string="Title", required=True)
      description = fields.Text()
      responsible_id = fields.Many2one('res.users', 
          ondelete='set null', string="Responsible", index=True)
      session_ids = fields.One2many('openacademy.session', 
          'course_id', string="Sessions")
  
      @api.multi # send defaults params: cr, uid, id , context
      def copy(self, default=None):
          default = dict(default or {})
  
          copied_count = self.search_count(
              [('name', '=like', u"Copy of {}%".format(self.name))])
          if not copied_count:
              new_name = u"Copy of {}".format(self.name)
          else:
              new_name = u"Copy of {} ({})".format(self.name, copied_count)
  
          default['name'] = new_name
          return super(Course, self).copy(default)
  
  
      _sql_constraints = [
          ('name_description_check',
           'CHECK(name != description)',
           "The title of the course should not be the description"),
  
          ('name_unique',
           'UNIQUE(name)',
           "The course title must be unique"),
      ]
  
subject: Modify copy method into inherit