This is already fixed in master branch. For more information please refer [1]. So marking it as invalid.
[1] https://github.com/openstack/horizon/blob/master/doc/source/contributor/tutorials/dashboard.rst#urls ** Changed in: horizon Status: New => Invalid -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Dashboard (Horizon). https://bugs.launchpad.net/bugs/1640427 Title: Error with the content of the Horizon dashboard tutorial at http://docs.openstack.org/developer/horizon/topics/table_actions.html #adding-the-url Status in OpenStack Dashboard (Horizon): Invalid Bug description: This tutorial specifies the following changes to be made to urls.py file: from django.conf.urls import url from openstack_dashboard.dashboards.mydashboard.mypanel import views urlpatterns = [, url(r'^$', views.IndexView.as_view(), name='index'), url(r'^(?P<instance_id>[^/]+)/create_snapshot/$', views.CreateSnapshotView.as_view(), name='create_snapshot'), ] After this change has been made, and after I restart the httpd I get an error in the horizon_error.log as posted below: __import__(name) [:error] [pid 11724] [remote 172.22.225.42:0] File "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/mydashboard/mypanel/urls.py", line 6 [:error] [pid 11724] [remote 172.22.225.42:0] urlpatterns = [, [:error] [pid 11724] [remote 172.22.225.42:0] ^ [:error] [pid 11724] [remote 172.22.225.42:0] SyntaxError: invalid syntax To fix this issue, we need to remove the comma next to the opening square bracket in urlpatterns = [, The resulting code should look like: urlpatterns = [ url(r'^$', views.IndexView.as_view(), name='index'), url(r'^(?P<instance_id>[^/]+)/create_snapshot/$', views.CreateSnapshotView.as_view(), name='create_snapshot'), ] To manage notifications about this bug go to: https://bugs.launchpad.net/horizon/+bug/1640427/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp