code: def __str__(self):
      if not self.version:
          tips = "No resource named {} was found".format(self.name)
      else:
          tips = "No resource named {}-{} was found".format(
              self.name, self.version
          )
      return tips
  
file_path: PaddleHub/paddlehub/utils/paddlex.py
imports: import os
  import shutil
  from paddlehub.server.server import module_server, CacheUpdater
  from paddlehub.utils import log, utils, xarfile
label_desc: Use image node_id 2 for calling the ResourceNotFoundError obj's underlying member method code with example usage: obj.__str__() and returns: tips