Read from specific Kafka topic using Python

Question

I have topic with 3 partitions and I'm trying to read from each specific partition using following code

from kafka import KafkaConsumer, TopicPartition

brokers = 'localhost:9092'
topic = 'b3'

m = KafkaConsumer(topic, bootstrap_servers=['localhost:9092'])
par = TopicPartition(topic=topic, partition=1)
m.assign(par)

but I am getting this error:

    raise IllegalStateError(self._SUBSCRIPTION_EXCEPTION_MESSAGE)
kafka.errors.IllegalStateError: IllegalStateError: You must choose only one way to configure your consumer: (1) subscribe to specific topics by name, (2) subscribe to topics matching a regex pattern, (3) assign itself specific topic-partitions.

Can somebody help me with this?

Answer 1

Can you remove the topic parameter from KafkaConsumer() and try again?

example:

# manually assign the partition list for the consumer
from kafka import TopicPartition, KafkaConsumer
consumer = KafkaConsumer(bootstrap_servers='localhost:1234')
consumer.assign([TopicPartition('foobar', 2)])
msg = next(consumer)

ref: http://kafka-python.readthedocs.io/en/master/