Facing the import error UserError

[yongsern]

Commit ID: f5003ef

2018-01-22 04:53:17,163 16192 ERROR ? werkzeug: Error on request:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 193, in run_wsgi
execute(self.server.app)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 181, in execute
application_iter = app(environ, start_response)
File "/home/yslau/odoo-8.0/openerp/service/server.py", line 291, in app
return self.app(e, s)
File "/home/yslau/odoo-8.0/openerp/service/wsgi_server.py", line 216, in application
return application_unproxied(environ, start_response)
File "/home/yslau/odoo-8.0/openerp/service/wsgi_server.py", line 202, in application_unproxied
result = handler(environ, start_response)
File "/home/yslau/odoo-8.0/openerp/http.py", line 1295, in call
self.load_addons()
File "/home/yslau/odoo-8.0/openerp/http.py", line 1316, in load_addons
m = import('openerp.addons.' + module)
File "/home/yslau/odoo-8.0/openerp/modules/module.py", line 80, in load_module
mod = imp.load_module('openerp.addons.' + module_part, f, path, descr)
File "/home/yslau/odoo-8.0/odoo-extra/website_twitter_wall/init.py", line 22, in
import controllers
File "/home/yslau/odoo-8.0/odoo-extra/website_twitter_wall/controllers/init.py", line 2, in
import main
File "/home/yslau/odoo-8.0/odoo-extra/website_twitter_wall/controllers/main.py", line 7, in
from openerp.addons.website_twitter_wall.models.oauth import Oauth
File "/home/yslau/odoo-8.0/odoo-extra/website_twitter_wall/models/init.py", line 3, in
import twitter_agent
File "/home/yslau/odoo-8.0/odoo-extra/website_twitter_wall/models/twitter_agent.py", line 4, in
from openerp.exceptions import UserError
ImportError: cannot import name UserError

[elhamdaoui]

Hello,
try to use

 from openerp.osv import fields, osv
  ....
 osv.except_osv(_('Error!')