Python：将类名作为参数传递给函数？

class TestSpeedRetrieval(webapp.RequestHandler):
  """
  Test retrieval times of various important records in the BigTable database 
  """
  def get(self):
      commandValidated = True 
      beginTime = time()
      itemList = Subscriber.all().fetch(1000) 

      for item in itemList: 
          pass 
      endTime = time()
      self.response.out.write("<br/>Subscribers count=" + str(len(itemList)) + 
           " Duration=" + duration(beginTime,endTime)) 
class TestSpeedRetrieval(webapp.RequestHandler)