gistfile1.txt

#Decorator function to create global method (Extend the object service)
#add this function outside of any class!
def extend(class_to_extend):
    """
    Decorator to use to extend a existing class with a new method
    Example :
    @extend(osv.osv)
    def new_method(self, *args, **kwargs):
        print 'I am in the new_method', self._name
        return True
    Will add the method new_method to the class osv.osv
    """
    def decorator(func):
        if hasattr(class_to_extend, func.func_name):
            raise osv.except_osv(_("Developer Error"),
                _("You can extend the class %s with the method %s.",
                "This method already exists. Use the decorator 'replace' instead"))
        setattr(class_to_extend, func.func_name, func)
        return class_to_extend
return decorator


@extend(osv.osv)
def your_method(self, cr, uid, filters, vals):
    #do stuff