new_contents: import setup_script
  from grab.spider import Spider, Task
  import logging
  
  class CustomSpider(Spider):
      initial_urls = ['http://ezinearticles.com/?What-I-Learnt-Losing-%A360,000-My-First-Year-as-a-Full-time-Trader&id=50262']
  
      def task_initial(self, grab, task):
          print grab.xpath_text('//title')
  
  logging.basicConfig(level=logging.DEBUG)
  bot = CustomSpider()
  bot.setup_cache(
      backend='mongo',
      database='spider_test',
  )
  bot.run()
  
subject: Add another usecase