text: #-*- coding: utf-8 -*-
  import pika
  
  connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
  channel = connection.channel()
  channel.queue_declare(queue='rpc_queue')
  
  def fib(n):
      if n == 0:
          return 0;
      elif n == 1:
          return 1;
      else:
          return fib(n-1) + fib(n-2)
  
  def on_quest(ch, method, props, body):
      n = int(body)
      print(" [.] fib(%s)" % n)
      response = fib(n)
  
      ch.basic_publish(exchange='',
                       routing_key=props.reply_to,
                       properties=pika.BasicProperties(correlation_id= \
                                                          props.correlation_id),
                      body=str(response))
      ch.basic_ack(delivery_tag=method.delivery_tag)
  
  channel.basic_qos(prefetch_count=1)
  channel.basic_consume(on_quest, queue='rpc_queue')
  
  print(" [x] Awaiting RPC requests")
  channel.start_consuming()
  