inheritance - Could I inherit from a custom module in odoo? -

i have custom module in odoo called "x_vehicles"

could possible inherit module overwrite create method??

i've code

class extend_vehicle(models.model):     _inherit = 'x_vehicle'      @api.model     def create(self, vals):          # something...          return super(extend_vehicle, self).write(vals) 

but error

2016-07-04 15:05:20,488 9217 error pro werkzeug: error on request: traceback (most recent call last):   file "/users/jose/work/odoo/env/lib/python2.7/site-packages/werkzeug/serving.py", line 177, in run_wsgi     execute(self.server.app)   file "/users/jose/work/odoo/env/lib/python2.7/site-packages/werkzeug/serving.py", line 165, in execute     application_iter = app(environ, start_response)   file "/users/jose/work/odoo/openerp/service/server.py", line 246, in app     return self.app(e, s)   file "/users/jose/work/odoo/openerp/service/wsgi_server.py", line 184, in application     return application_unproxied(environ, start_response)   file "/users/jose/work/odoo/openerp/service/wsgi_server.py", line 170, in application_unproxied     result = handler(environ, start_response)   file "/users/jose/work/odoo/openerp/http.py", line 1493, in __call__     return self.dispatch(environ, start_response)   file "/users/jose/work/odoo/openerp/http.py", line 1467, in __call__     return self.app(environ, start_wrapped)   file "/users/jose/work/odoo/env/lib/python2.7/site-packages/werkzeug/wsgi.py", line 588, in __call__     return self.app(environ, start_response)   file "/users/jose/work/odoo/openerp/http.py", line 1642, in dispatch     ir_http = request.registry['ir.http']   file "/users/jose/work/odoo/openerp/http.py", line 363, in registry     return openerp.modules.registry.registrymanager.get(self.db) if self.db else none   file "/users/jose/work/odoo/openerp/modules/registry.py", line 355, in     update_module)   file "/users/jose/work/odoo/openerp/modules/registry.py", line 386, in new     openerp.modules.load_modules(registry._db, force_demo, status, update_module)   file "/users/jose/work/odoo/openerp/modules/loading.py", line 334, in load_modules     force, status, report, loaded_modules, update_module)   file "/users/jose/work/odoo/openerp/modules/loading.py", line 237, in load_marked_modules     loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)   file "/users/jose/work/odoo/openerp/modules/loading.py", line 132, in load_module_graph     models = registry.load(cr, package)   file "/users/jose/work/odoo/openerp/modules/registry.py", line 169, in load     model = cls._build_model(self, cr)   file "/users/jose/work/odoo/openerp/models.py", line 591, in _build_model     original_module = pool[name]._original_module if name in parents else cls._module   file "/users/jose/work/odoo/openerp/modules/registry.py", line 84, in __getitem__     return self.models[model_name] keyerror: 'x_vehicle' 

i don't know if need extend other model or special...

please, me??

edit: maybe name "custom module" i've made mistake... it's module built inside odoo, not external module. don't have code of module. built tool odoo provides.

i can't extract structure because it's little bit complicated extract functionality, so, need try inherit module

i'll hope more specific

edit 2: think here problem... if try install module inherit functionality, in tab "technical data" can see model unknown... don't know why...

also, actual openerp.py file

{     ...     'category': 'automation',     'version': '1',     # module necessary 1 work correctly     'depends': ['base','x_vehicle'],     # loaded     'data': [      ] } 

yes possible.

open __openerp__.py file , update following key

"depends" : [     'base', 'list_of_core_module', 'your_custom_module_name' ], 

where

list_of_core_module sale, purchase, account etc...,

your_custom_module_name have declared x_vehicles class

restart server , upgrade current module work on.