code: def __del__(self):
      try:
          if self.filename:
              self.persist()
      except Exception as e:
          _logger.error("persist failed %s %s", self.filename, e)
  
file_path: Theano/theano/gof/callcache.py
imports: from __future__ import absolute_import, print_function, division
  import logging
  import six.moves.cPickle
label_desc: Use image node_id 4 for calling the CallCache obj's underlying member method code with example usage: obj.__del__() without return types