code: def __del__(self):
      self._save_jobs()
      if self.locker.unlock(self.jobs_pkl):
          pass
      else:
          raise Exception("Could not release lock on job grid.\n")
  
imports: import os
  import sys
  import tempfile
  import pickle
  import numpy
  import numpy.random
  from .spearmint_pb2 import *
  from .Locker import *
  from .sobol_lib import *
  from .helpers import *
  import logging
label_desc: Use image node_id 5 for calling the ExperimentGrid obj's underlying member method code with example usage: obj.__del__() without return types