python - Kafka consumer: AttributeError: 'list' object has no attribute 'map' -


i want read messages kafka queue in python. example, in scala it's quite easy do:

    val ssc = new streamingcontext(conf, seconds(20))      // divide topic partitions     val topicmessages = "mykafkatopic"     val topicmessagesmap = topicmessages.split(",").map((_, kafkanumthreads)).tomap      val messages = kafkautils.createstream(ssc, zkquorum, group, topicmessagesmap).map(_._2)      messages.foreachrdd { rdd =>       //...     }

i want same in python. current python code:

from pyspark.streaming import streamingcontext pyspark.streaming.kafka import kafkautils  ssc = streamingcontext(sc, 20)  topicmessages = "mykafkatopic" topicmessagesmap = topicmessages.split(",").map((_, kafkanumthreads)).tomap  messages = kafkautils.createstream(ssc, zkquorum, group, topicmessagesmap)

however error @ line topicmessagesmap = topicmessages.split(",").map((_, kafkanumthreads)).tomap:

attributeerror: 'list' object has no attribute 'map'

how make code working?

update:

if run code in jupyter notebook, error shown below:

messages = kafkautils.createstream(ssc, zkquorum, "spark-streaming-consumer", {inputkafkatopic: list})

spark streaming's kafka libraries not found in class path. try 1 of following.

  1. include kafka library , dependencies in spark-submit command as

    $ bin/spark-submit --packages org.apache.spark:spark-streaming-kafka-0-8:2.0.0 ...

  2. download jar of artifact maven central http://search.maven.org/, group id = org.apache.spark, artifact id = spark-streaming-kafka-0-8-assembly, version = 2.0.0. then, include jar in spark-submit command as

    $ bin/spark-submit --jars ...

do understand correctly way make working use spark-submit , it's impossible run code jupyter/ipython?


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