In talking with Patrick on IRC, it came up that the python bindings
apparently lack support for the tag exclusion API, which has been in
libnotmuch for almost a year.  Did I miss something? If not, would you
minding adding that to your TODO list for the binding? It would be nice
if all frontends had access to the same exclude mechanism since it is
the natural way to handle e.g. spam and deleted messages.

All the best,

David