progz-ubuntu:~$ ./openstack.py --list
Traceback (most recent call last):
  File "./openstack.py", line 66, in <module>
    import os_client_config
  File "/usr/local/lib/python2.7/dist-packages/os_client_config/__init__.py", line 19, in <module>
    from os_client_config import cloud_config
  File "/usr/local/lib/python2.7/dist-packages/os_client_config/cloud_config.py", line 17, in <module>
    from openstack import _log
  File "/home/adrien.chielly/openstack.py", line 67, in <module>
    import shade
  File "/usr/local/lib/python2.7/dist-packages/shade/__init__.py", line 24, in <module>
    from shade.openstackcloud import OpenStackCloud
  File "/usr/local/lib/python2.7/dist-packages/shade/openstackcloud.py", line 24, in <module>
    import os_client_config.defaults
  File "/usr/local/lib/python2.7/dist-packages/os_client_config/defaults.py", line 17, in <module>
    from openstack.config import defaults
ImportError: No module named config

progz-ubuntu:~$ sudo pip install config
The directory '/home/adrien.chielly/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/adrien.chielly/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied: config in /usr/local/lib/python2.7/dist-packages (0.3.9)