dperaltab

columns = {
    .
    .
    .
    #agregar el nuevo atributo
    'departamento_id' : fields.many2one('departamento', 'Departamento'),
}

class departamento(osv.osv):
    _name = "departamento"

dperaltab

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <!-- Top menu item -->
        <menuitem name="Alumno" id="alumno_menu_base"/>
            <menuitem name="Registro alumno" id="alumno_menu_base_reg" parent="alumno_menu_base" />

        <!-- tree -->
        <record model="ir.ui.view" id="alumno_tree_view">
            <field name="name">alumno.tree</field>

dperaltab

# -*- coding: utf-8 -*-
from osv import fields, osv

class alumno(osv.osv):
    _name = "alumno"
    _description = "Registro alumno"

    _columns = {
        'nombres' : fields.char('Nombres', size=64, required=True),
        'apellido_paterno' : fields.char('Apellido Paterno', size=64),

dperaltab

{
    "name" : "Alumno",
    "version" : "0.1",
    "author" : "yaroslab",
    "website" : "http://yaroslab.com/",
    "category" : "Generic Modules/Others",
    "depends" : ["base"],
    "description" : "Registro alumno",
    "init_xml" : ["alumno_view.xml",],
    "demo_xml" : [],