old_contents: #!/usr/bin/env python
  from performance.routine import Tool
  import config
  
  
  def main():
      tool = Tool(config=config.CONFIG)
      tool.run()
  
  if __name__ == '__main__':
      main()
  
new_contents: #!/usr/bin/env python
  from performance.routine import Tool, Config
  
  
  def main():
      config = Config(host='http://www.google.de', requests_per_client=10, clients_count=3)
      tool = Tool(config=config)
      tool.run()
  
  if __name__ == '__main__':
      main()
  
subject: Update run.py to use new performance.Config