code: def testHash(self):
      for obj in self.objects:
          ob_hash = lambda: hash(obj)
          self.assertRaises(TypeError, ob_hash)
  
imports: from mpi4py import MPI
  import mpiunittest
  import ctypes
  import operator
  import weakref
  import sys
label_desc: Use image node_id 6 for calling the TestObjModel obj's underlying member method code with example usage: obj.testHash() without return types