my problem is the following when installing caffeine & Dockbarx I try to run nothing appears o.o? and execute it in terminal gives me the following message:

Code:
hikaru@linux-b8g6:~> caffeine
Traceback (most recent call last):
  File "/usr/bin/caffeine", line 38, in <module>
    import caffeine
  File "/usr/lib/python2.6/site-packages/caffeine/__init__.py", line 171, in <module>
    from caffeine.main import main
  File "/usr/lib/python2.6/site-packages/caffeine/main.py", line 40, in <module>
    import core
  File "/usr/lib/python2.6/site-packages/caffeine/core.py", line 38, in <module>
    import Xlib.display
ImportError: No module named Xlib.display
and the dockbarx I also managed to install but does not start and terminal The following message appears:

Code:
hikaru@linux-b8g6:~> dbx_preference.py
Traceback (most recent call last):
  File "/usr/bin/dbx_preference.py", line 30, in <module>
    from dockbarx.common import *
  File "/usr/local/lib/python2.6/site-packages/dockbarx/common.py", line 25, in <module>
    import xdg.DesktopEntry
ImportError: No module named xdg.DesktopEntry
if not too much trouble to help me