code: def _req_files_move(self, pid, fids):
          
          url = self.web_api_url + '/move'
          data = {}
          data['pid'] = pid
          for i, fid in enumerate(fids):
              data['fid[%d]' % i] = fid
          req = Request(method='POST', url=url, data=data)
          res = self.http.send(req)
          if res.state:
              return True
          else:
              raise RequestFailure('Failed to access files API.')
docs: Move files or directories
          :param str pid: destination directory id
          :param list fids: a list of ids of files or directories to be moved