To any who may care, I've opened an issue in the Python bug tracker in
the hopes that we might have a guaranteed way of being made aware of
security issues in Python before Qubes users get owned by them.
See here:
https://bugs.python.org/issue31953
My hope is that a guarantee of receiving such news means Qubes has a
higher change of making a timely QSB and "update dom0 ASAP!"
announcement if the time ever comes. Many of us follow news in the
security world anyway and might hear of such a potential issue
regardless, but still...
Regards,
Jean-Philippe