code: def handle_lease(queue_name):
      
      owner = request.form.get('owner', request.remote_addr, type=str)
      try:
          task_list = work_queue.lease(
              queue_name,
              owner,
              request.form.get('count', 1, type=int),
              request.form.get('timeout', 60, type=int))
      except work_queue.Error, e:
          return utils.jsonify_error(e)
  
      if not task_list:
          return flask.jsonify(tasks=[])
  
      db.session.commit()
      task_ids = [t['task_id'] for t in task_list]
      logging.debug('Task leased: queue=%r, task_ids=%r, owner=%r',
                    queue_name, task_ids, owner)
      return flask.jsonify(tasks=task_list)
docs: Leases a task from a queue.