If you want to demonstration module in OpenERP(Odoo) follow the below mentioned step:
for creation of any module in Odoo you have to make five files,given below-
1-__init__.py // its indicate the import instructions for various Python files in the module.
2- __openerp__.py // its having name , vesion , description' etc
3-_python.py //description of python file
4-_views.xml // its having xml and wizard
5-_workflow.xml // its having workflow and data of module