# Pastebin Tphqf4XO
~/Projects/openstack/horizon stable/train*
venv ❯ python manage.py runserver 0.0.0.0:8080

Performing system checks...

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x110404e18>
Traceback (most recent call last):
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 120, in inner_run
    self.check(display_num_errors=True)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/core/management/base.py", line 364, in check
    include_deployment_checks=include_deployment_checks,
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/core/management/base.py", line 351, in _run_checks
    return checks.run_checks(**kwargs)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/core/checks/registry.py", line 73, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/core/checks/urls.py", line 40, in check_url_namespaces_unique
    all_namespaces = _load_all_namespaces(resolver)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/core/checks/urls.py", line 57, in _load_all_namespaces
    url_patterns = getattr(resolver, 'url_patterns', [])
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/urls/resolvers.py", line 540, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/site-packages/django/urls/resolvers.py", line 533, in urlconf_module
    return import_module(self.urlconf_name)
  File "/Users/andrein/Projects/openstack/horizon/venv/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/andrein/Projects/openstack/horizon/openstack_dashboard/urls.py", line 35, in <module>
    from openstack_dashboard.api import rest
  File "/Users/andrein/Projects/openstack/horizon/openstack_dashboard/api/__init__.py", line 38, in <module>
    from openstack_dashboard.api import network
  File "/Users/andrein/Projects/openstack/horizon/openstack_dashboard/api/network.py", line 23, in <module>
    from openstack_dashboard.api import neutron
  File "/Users/andrein/Projects/openstack/horizon/openstack_dashboard/api/neutron.py", line 39, in <module>
    from openstack_dashboard.api import nova
  File "/Users/andrein/Projects/openstack/horizon/openstack_dashboard/api/nova.py", line 33, in <module>
    from novaclient.v2 import list_extensions as nova_list_extensions
ImportError: cannot import name 'list_extensions'