old_contents: # -*- coding: utf-8 -*-
  # Copyright 2016 Yelp Inc.
  #
  # Licensed 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.
  from kafka import KafkaClient
  
  
  def prepare_host_list(broker_list):
      """Returns string with broker_list hosts, compatible format with KafkaClient ctor.
      String format:
          * string: '{host}:{port}, ...'
      """
      return ','.join(
          [
              '{host}:{port}'.format(host=broker_info['host'], port=broker_info['port'])
              for broker_info in broker_list.values()
          ]
      )
  
  
  def get_topic_partition_metadata(hosts):
      """Returns topic-partition metadata from Kafka broker."""
      kafka_client = KafkaClient(hosts, timeout=10)
      return kafka_client.topic_partitions
  
new_contents: # -*- coding: utf-8 -*-
  # Copyright 2016 Yelp Inc.
  #
  # Licensed 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.
  from kafka import KafkaClient
  
  
  def get_topic_partition_metadata(hosts):
      """Returns topic-partition metadata from Kafka broker."""
      kafka_client = KafkaClient(hosts, timeout=10)
      return kafka_client.topic_partitions
  
subject: Remove useless function