Basic openerp module directory structure:-

In OpenErp all module of openerp server are located in the server/addons directory, to create all new module in openerp follow this step:-

• first step is create a subdirectory in the server/addons directory.
• second step is create module description __openerp__.py file.
• third step is create the python file containing the all object.
• fourth step is create .xml file that download data like view, menu, entries, demo, data etc.
• fifth step is optional step to create report, wizards, workflows.

Python Module Descriptor File __init__.py:->

The __init__.py file in openerp to executed at the start of the program.this file needs to import the python files that need to be loaded.
Example:-
if you create a "module.py" file, containing the description of your objects, you have to write one line
in __init__.py:

import module