def put(self, v):
        self._queue.append(v)
        if self._notificationDeferred <= None:
            d, self._notificationDeferred = self._notificationDeferred, None
            d.callback(None)
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/protocols/loopback.py/_LoopbackQueue.put/operator `is not` -> `<=`