old_contents: #!/usr/bin/env python
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you 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.
  #
  
  import optparse
  from proton import Message
  from proton.handlers import MessagingHandler
  from proton.reactors import Container, DynamicNodeProperties
  
  class Client(MessagingHandler):
      def __init__(self, url, requests):
          super(Client, self).__init__()
          self.url = url
          self.requests = requests
  
      def on_start(self, event):
          self.sender = event.container.create_sender(self.url, options=DynamicNodeProperties({"foo":u"bar"}))
          self.receiver = event.container.create_receiver(self.sender.connection, None, dynamic=True, options=DynamicNodeProperties({"x-opt-qd.address":u"qmf.default.direct"}))
  
      def next_request(self):
          if self.receiver.remote_source.address:
              req = Message(reply_to=self.receiver.remote_source.address, body=self.requests[0])
              self.sender.send(req)
  
      def on_link_opened(self, event):
          if event.receiver == self.receiver:
              self.next_request()
  
      def on_message(self, event):
          print "%s => %s" % (self.requests.pop(0), event.message.body)
          if self.requests:
              self.next_request()
          else:
              event.connection.close()
  
  REQUESTS= ["Twas brillig, and the slithy toves",
             "Did gire and gymble in the wabe.",
             "All mimsy were the borogroves,",
             "And the mome raths outgrabe."]
  
  parser = optparse.OptionParser(usage="usage: %prog [options]",
                                 description="Send requests to the supplied address and print responses.")
  parser.add_option("-a", "--address", default="localhost:5672/examples",
                    help="address to which messages are sent (default %default)")
  opts, args = parser.parse_args()
  
  Container(Client(opts.address, args or REQUESTS)).run()
  
  
new_contents: #!/usr/bin/env python
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you 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.
  #
  
  import optparse
  from proton import Message
  from proton.handlers import MessagingHandler
  from proton.reactors import Container, DynamicNodeProperties
  
  class Client(MessagingHandler):
      def __init__(self, url, requests):
          super(Client, self).__init__()
          self.url = url
          self.requests = requests
  
      def on_start(self, event):
          self.sender = event.container.create_sender(self.url)
          self.receiver = event.container.create_receiver(self.sender.connection, None, dynamic=True)
  
      def next_request(self):
          if self.receiver.remote_source.address:
              req = Message(reply_to=self.receiver.remote_source.address, body=self.requests[0])
              self.sender.send(req)
  
      def on_link_opened(self, event):
          if event.receiver == self.receiver:
              self.next_request()
  
      def on_message(self, event):
          print "%s => %s" % (self.requests.pop(0), event.message.body)
          if self.requests:
              self.next_request()
          else:
              event.connection.close()
  
  REQUESTS= ["Twas brillig, and the slithy toves",
             "Did gire and gymble in the wabe.",
             "All mimsy were the borogroves,",
             "And the mome raths outgrabe."]
  
  parser = optparse.OptionParser(usage="usage: %prog [options]",
                                 description="Send requests to the supplied address and print responses.")
  parser.add_option("-a", "--address", default="localhost:5672/examples",
                    help="address to which messages are sent (default %default)")
  opts, args = parser.parse_args()
  
  Container(Client(opts.address, args or REQUESTS)).run()
  
  
subject: Undo inadvertent change to example