Hi,

You can use standard inheritance for this:-

        _inherit = 'model' (without any _name)

You can use standard inheritance to add new behaviors/extend existing models. For example you want to add a new field to a 'custom.object' and add a new method:

class CustomObject(orm.Model):
    _inherit = "custom.object" 
    _column = {
        'my_field': fields.char('My new field')   
              }  
    def a_new_func(self, cr, uid, ids, x, y, context=None):
        # my stuff       
        return something

**You can also override existing methods: [ if you want to inherit an existing method and add a few codes on it, you can use like this  ]

• here super calls the original method and returns the value and you can add your code after that
  
  

def existing(self, cr, uid, ids, x, y, z, context=None):
    parent_res = super(CustomObject, self).existing(cr, uid, ids, x, y, z, context=context) 
     # my stuff   <--- here goes your code
    return parent_res_plus_my_stuff`

**  In some cases you want to modify the entire functionality of a method and have to redefine that method, in that case you can simply define that function without using super :-

def existing(self, cr, uid, ids, x, y, z, context=None):
    # my stuff   <--- here goes your code    
    return my_stuff`

Hope this helps.