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+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+ Create a queue of RDDs that will be mapped/reduced one at a time in
+ 1 second intervals.
+
+ To run this example use
+ `$ bin/spark-submit examples/src/main/python/streaming/queue_stream.py
+"""
+import sys
+import time
+
+from pyspark import SparkContext
+from pyspark.streaming import StreamingContext
+
+if __name__ == "__main__":
+
+ sc = SparkContext(appName="PythonStreamingQueueStream")
+ ssc = StreamingContext(sc, 1)
+
+ # Create the queue through which RDDs can be pushed to
+ # a QueueInputDStream
+ rddQueue = []
+ for i in xrange(5):
+ rddQueue += [ssc.sparkContext.parallelize([j for j in xrange(1, 1001)], 10)]
+
+ # Create the QueueInputDStream and use it do some processing
+ inputStream = ssc.queueStream(rddQueue)
+ mappedStream = inputStream.map(lambda x: (x % 10, 1))
+ reducedStream = mappedStream.reduceByKey(lambda a, b: a + b)
+ reducedStream.pprint()
+
+ ssc.start()
+ time.sleep(6)
+ ssc.stop(stopSparkContext=True, stopGraceFully=True)