Traceback (most recent call last):
  File "/usr/bin/landscape-sysinfo", line 6, in <module>
    from twisted.internet import reactor
  File "/usr/lib/python2.6/dist-packages/twisted/internet/reactor.py", line 37, in <module>
    from twisted.internet import selectreactor
  File "/usr/lib/python2.6/dist-packages/twisted/internet/selectreactor.py", line 17, in <module>
    from zope.interface import implements
ImportError: No module named zope.interface