code: def _parse_filenames(self, filenames):
      # extract filenames and return [ <iteration> ]
      return [self._parse_filename(f) for f in filenames]
  
imports: import errno
  import os
  import shutil
  import tempfile
  import time
  import warnings
  import chainer
  from chainer.training import extension
label_desc: Use image node_id 9 for calling the _MultiNodeCheckpointer obj's underlying member method code with example usage: obj._parse_filenames(filenames) and returns: unknown