text: 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_request(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(queue='rpc_queue', on_message_callback=on_request)
  
  print(" [x] Awaiting RPC requests")
  channel.start_consuming()