Hardened python

gistfile1.txt

restarting the *program* on unknown exception is probably a better start
this would typically be implemented/configured by your init system
in upstart, it's just a matter of adding "respawn" to the config file
(there's options for saying how many times to try, with what sort of delay, etc)
systemd will have something as well
with an old-style shell-script based system, you'd probably want to look into the help "start-stop-daemon", which again has options for this sort of thing

Also:
http://supervisord.org/