code: def blacklist(db, term=None):
      mbs = []
      with db.connect() as session:
          if term:
              mbs = session.query(MatchingBlacklist).\
                  filter(MatchingBlacklist.excluded.like('%' + term + '%')).\
                  order_by(MatchingBlacklist.excluded).all()
              if not mbs:
                  raise NotFoundError(entity=term)
          else:
              mbs = session.query(MatchingBlacklist).\
                  order_by(MatchingBlacklist.excluded).all()
          session.expunge_all()
      return mbs