old_contents: import config
  from src.example import Example
  
  def handle(event, context):
      print Example().work()
      return event
  
new_contents: import config
  from src.example import Example
  
  def handle(event, context):
      print Example().work()
      return event
  
  if __name__ == '__main__':
      handle({}, {})
  
subject: Support standalone execute