code: def _load_dev_examples(self):
      self.dev_path = os.path.join(self.base_path, self.dev_file)
      self.dev_examples = self._read_file(self.dev_path, phase="dev")
  
imports: import os
  from paddlehub.utils.log import logger
label_desc: Use image node_id 12 for calling the BaseDataset obj's underlying member method code with example usage: obj._load_dev_examples() without return types