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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def queueStream(self, rdds, oneAtATime=True, default=None):
 """ Create an input stream from a queue of RDDs or list. In each batch, it will process either one or all of the RDDs returned by the queue. .. note:: Changes to the queue after the stream is created will not be recognized. @param rdds: Queue of RDDs @param oneAtATime: pick one rdd each time or pick all of them once. @param default: The default rdd if no more in rdds """

        if default and not isinstance(default, RDD):
            default = self._sc.parallelize(default)

        if not rdds and default:
            rdds = [rdds]

        if rdds and not isinstance(rdds[0], RDD):
            rdds = [self._sc.parallelize(input) for input in rdds]
        self._check_serializers(rdds)

        queue = self._jvm.PythonDStream.toRDDQueue([r._jrdd for r in rdds])
        if default:
            default = default._reserialize(rdds[0]._jrdd_deserializer)
            jdstream = self._jssc.queueStream(queue, oneAtATime, default._jrdd)
        else:
            jdstream = self._jssc.queueStream(queue, oneAtATime)
        return DStream(jdstream, self, rdds[0]._jrdd_deserializer)