No module named pathlib

[Eduard Biceri-Matei]

Trying to install devstack (both L and K)

Error during stack.sh
2015-04-23 07:21:55.646 | + cd /opt/stack/horizon
2015-04-23 07:21:55.647 | + ./run_tests.sh -N --compilemessages
2015-04-23 07:21:55.927 | WARNING:root:No local_settings file found.
2015-04-23 07:21:56.523 | Traceback (most recent call last):
2015-04-23 07:21:56.523 | File "/opt/stack/horizon/manage.py", line 23, in <module>
2015-04-23 07:21:56.523 | execute_from_command_line(sys.argv)
2015-04-23 07:21:56.523 | File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
2015-04-23 07:21:56.523 | utility.execute()
2015-04-23 07:21:56.523 | File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 354, in execute
2015-04-23 07:21:56.523 | django.setup()
2015-04-23 07:21:56.523 | File "/usr/local/lib/python2.7/dist-packages/django/__init__.py", line 21, in setup
2015-04-23 07:21:56.523 | apps.populate(settings.INSTALLED_APPS)
2015-04-23 07:21:56.523 | File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 85, in populate
2015-04-23 07:21:56.523 | app_config = AppConfig.create(entry)
2015-04-23 07:21:56.523 | File "/usr/local/lib/python2.7/dist-packages/django/apps/config.py", line 87, in create
2015-04-23 07:21:56.523 | module = import_module(entry)
2015-04-23 07:21:56.523 | File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
2015-04-23 07:21:56.524 | __import__(name)
2015-04-23 07:21:56.524 | File "/usr/local/lib/python2.7/dist-packages/django_pyscss/__init__.py", line 1, in <module>
2015-04-23 07:21:56.524 | from .compiler import DjangoScssCompiler # NOQA
2015-04-23 07:21:56.524 | File "/usr/local/lib/python2.7/dist-packages/django_pyscss/compiler.py", line 4, in <module>
2015-04-23 07:21:56.524 | from pathlib import PurePath
2015-04-23 07:21:56.524 | ImportError: No module named pathlib
2015-04-23 07:21:56.548 | + exit_trap
2015-04-23 07:21:56.548 | + local r=1
2015-04-23 07:21:56.549 | ++ jobs -p
2015-04-23 07:21:56.550 | + jobs=
2015-04-23 07:21:56.550 | + [[ -n '' ]]
2015-04-23 07:21:56.550 | + kill_spinner
2015-04-23 07:21:56.550 | + '[' '!' -z '' ']'
2015-04-23 07:21:56.550 | + [[ 1 -ne 0 ]]
2015-04-23 07:21:56.550 | + echo 'Error on exit'
2015-04-23 07:21:56.550 | Error on exit
2015-04-23 07:21:56.550 | + [[ -z /opt/stack/logs ]]
2015-04-23 07:21:56.550 | + /opt/devstack/tools/worlddump.py -d /opt/stack/logs
2015-04-23 07:21:56.586 | + exit 1

Manually "pip install pathlib" and then retried:
+ cd /opt/stack/horizon
+ ./run_tests.sh -N --compilemessages
WARNING:root:No local_settings file found.
Traceback (most recent call last):
  File "/opt/stack/horizon/manage.py", line 23, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 354, in execute
    django.setup()
  File "/usr/local/lib/python2.7/dist-packages/django/__init__.py", line 21, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
  File "/usr/local/lib/python2.7/dist-packages/django/apps/config.py", line 87, in create
    module = import_module(entry)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/usr/local/lib/python2.7/dist-packages/django_pyscss/__init__.py", line 1, in <module>
    from .compiler import DjangoScssCompiler # NOQA
  File "/usr/local/lib/python2.7/dist-packages/django_pyscss/compiler.py", line 11, in <module>
    from scss import Compiler, config
ImportError: cannot import name Compiler
+ exit_trap
+ local r=1
++ jobs -p
+ jobs=
+ [[ -n '' ]]
+ kill_spinner
+ '[' '!' -z '' ']'
+ [[ 1 -ne 0 ]]
+ echo 'Error on exit'
Error on exit
+ [[ -z /opt/stack/logs ]]
+ /opt/devstack/tools/worlddump.py -d /opt/stack/logs
World dumping... see /opt/stack/logs/worlddump-2015-04-23-073207.txt for details
+ exit 1

[reachlin (reachlin)]

I see this error too today on redhat7

[Eduard Biceri-Matei (cubusbacau)]

Seems to be caused by an old REQUIREMENTS option that was left in the local.conf. (REQUIREMENTS_BRANCH=refs/changes/60/171060/3)
Removed it and now it works.

It was added a while back when the install was broken by some mismatched packages.

So this ticket can be ignored.

[Timur Sufiev (tsufiev-x)]

The same applies for running Horizon tests separate from the rest OpenStack.

[Rob Cresswell (robcresswell-deactivatedaccount)]

Addressed by https://review.openstack.org/#/c/176584/ (Kilo) and https://review.openstack.org/#/c/176581/ (Master/ Liberty)

[Anthony Chow (vcloudernbeer)]

My local.conf does not have REQUIREMENTS_BRANCH and I still get this Python error while trying to install devstack on ubuntu 12.04

[[local|localrc]]
FLOATING_RANGE=192.168.10.224/27
FIXED_RANGE=10.11.12.0/24
FIXED_NETWORK_SIZE=256
FLAT_INTERFACE=eth0
ADMIN_PASSWORD=password
MYSQL_PASSWORD=password
RABBIT_PASSWORD=password
SERVICE_PASSWORD=password
SERVICE_TOKEN=password

[Matt Riedemann (mriedem)]

Bug 1447433 is basically the same.

[hongbo (hongbo-tianhongbo)]

for python2.7， pathlib and other libs are not part of the standard library.