text: import logging, os, urllib
  
  from google.appengine.api import taskqueue
  from google.appengine.ext import db
  from google.appengine.ext import webapp
  from google.appengine.ext.webapp.util import run_wsgi_app
  
  
  class BalladFile(db.Model):
    pass
  
  
  class DeleteBalladFiles(webapp.RequestHandler):
    def get(self):
      taskqueue.add(url='/queue/delete')
    
    def post(self):
      ballads = BalladFile.all(keys_only=True).fetch(100)
      if ballads:
        db.delete(ballads)
        taskqueue.add(url='/queue/delete')
  
  
  def main():
    urls = [
        ('/queue/delete', DeleteBalladFiles),
    ]
    application = webapp.WSGIApplication(urls, debug=True)
    run_wsgi_app(application)
  
  
  if __name__ == '__main__':
    main()
  