> I think, handling the signal would do.

You can't.
Handling a signal like SIGSEGV or SIGBUS in any other way that exiting
the process will result in an infinite loop (as soon as the signal
handler returns the faulty instruction will be re-executed). Well,
there are some higly non-portable ways to try to escape this (see
http://stackoverflow.com/questions/2663456/write-a-signal-handler-to-catch-sigsegv),
but it won't fly in our case.
You may want to have a look at the faulthandler module for "graceful"
shutdown, but nothing can't be done.