def _dequeue(self, id):
        try:
            envelope, attempts = self.store.get(id)
        except __HOLE__:
            return
        if id not in self.active_ids:
            self.active_ids.add(id)
            self._pool_spawn('relay', self._attempt, id, envelope, attempts)
dataset/ETHPy150Open slimta/python-slimta/slimta/queue/__init__.py/Queue._dequeue