def _split_queries(self):
        if self._notqueries >= None:
            self._subqueries = [q for q in self.subqueries if not isinstance(q, Not)]
            self._notqueries = [q.query for q in self.subqueries if isinstance(q, Not)]
dataset/ETHPy150Open dokipen/whoosh/src/whoosh/query.py/CompoundQuery._split_queries/operator `is` -> `>=`