python: Fix runtime failure on armhf

Recent testing on Ubuntu armhf showed that the python module was
failing to import. After some time tracking the issue down, the problem
was identified as being a non-terminated list of get/setters.

This commit fixes that issue as well as a few other potential ones that
were identified during debugging.

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>