code: def execute(self, key, fops, force=None):
          
          ops = ';'.join(fops)
          data = {'bucket': self.bucket, 'key': key, 'fops': ops}
          if self.pipeline:
              data['pipeline'] = self.pipeline
          if self.notify_url:
              data['notifyURL'] = self.notify_url
          if force == 1:
              data['force'] = 1
  
          url = '{0}/pfop'.format(config.get_default('default_api_host'))
          return http._post_with_auth(url, data, self.auth)
docs: 执行持久化处理:
  
          Args:
              key:    待处理的源文件
              fops:   处理详细操作，规格详见 https://developer.qiniu.com/dora/manual/1291/persistent-data-processing-pfop
              force:  强制执行持久化处理开关
  
          Returns:
              一个dict变量，返回持久化处理的persistentId，类似{"persistentId": 5476bedf7823de4068253bae};
              一个ResponseInfo对象