text: import datetime
  import time
  
  import bonobo
  
  
  def extract():
      """Placeholder, change, rename, remove... """
      for x in range(60):
          if x:
              time.sleep(1)
          yield datetime.datetime.now()
  
  
  def get_graph():
      graph = bonobo.Graph()
      graph.add_chain(extract, print)
  
      return graph
  
  
  if __name__ == "__main__":
      parser = bonobo.get_argument_parser()
      with bonobo.parse_args(parser):
          bonobo.run(get_graph())
  