old_contents: from maga import Maga
  
  import logging
  logging.basicConfig(level=logging.INFO)
  
  
  class Crawler(Maga):
      async def handler(self, infohash):
          logging.info(infohash)
  
  crawler = Crawler()
  crawler.run(6881)
  
new_contents: from maga import Maga
  
  import logging
  logging.basicConfig(level=logging.INFO)
  
  
  class Crawler(Maga):
      async def handler(self, infohash, addr):
          logging.info(infohash)
  
  crawler = Crawler()
  crawler.run(6881)
  
subject: correct the example