old_contents: 
  from opencog.atomspace import AtomSpace, types
  from opencog.utilities import initialize_opencog, finalize_opencog
  from opencog.bindlink import execute_atom
  import opencog.scheme_wrapper as scheme
  from opencog.scheme_wrapper import load_scm, scheme_eval
  from opencog.type_constructors import *
  
  atomspace = AtomSpace()
  
  # Initialize Scheme
  scheme_preload = [  
                      "opencog/atomspace/core_types.scm",
                      "opencog/scm/utilities.scm" 
                   ]
  scheme.__init__(atomspace)
  for scheme_file in scheme_preload:
      load_scm(atomspace, scheme_file)
  
  initialize_opencog(atomspace, "utilities_test.conf")
  
  executed = False
  
  def add_link(atom1, atom2):
      global executed
      link = ATOMSPACE.add_link(types.ListLink, [atom1, atom2])
      executed = True
      return link
  
  execute_code = \
      '''
      (cog-execute!
          (ExecutionOutputLink
              (GroundedSchemaNode \"py: add_link\")
              (ListLink
                  (ConceptNode \"one\")
                  (ConceptNode \"two\")
              )
          )
      )
      '''
  scheme_eval(atomspace, execute_code)
  
  print "execute: cog-execute"
  if (executed):
      print "add_link - executed successfully"
  else:
      print "add_link - did NOT execute"
  
  executed = False
  execute_atom(   atomspace,
      ExecutionOutputLink( 
          GroundedSchemaNode("py: add_link"),
          ListLink(
              ConceptNode("one"),
              ConceptNode("two") 
          )
      )
  )
  print "execute: execute_atom"
  if (executed):
      print "add_link - executed successfully"
  else:
      print "add_link - did NOT execute"
  
  
  finalize_opencog()
  del atomspace
  
new_contents: 
  from opencog.atomspace import AtomSpace, types
  from opencog.utilities import initialize_opencog, finalize_opencog
  from opencog.bindlink import execute_atom
  import opencog.scheme_wrapper as scheme
  from opencog.scheme_wrapper import load_scm, scheme_eval
  from opencog.type_constructors import *
  
  atomspace = AtomSpace()
  
  # Initialize Scheme
  scheme_preload = [  
                      "opencog/atomspace/core_types.scm",
                      "opencog/scm/utilities.scm" 
                   ]
  scheme.__init__(atomspace)
  for scheme_file in scheme_preload:
      load_scm(atomspace, scheme_file)
  
  initialize_opencog(atomspace, "utilities_test.conf")
  
  executed = False
  
  def add_link(atom1, atom2):
      global executed
      link = ListLink(atom1, atom2)
      executed = True
      return link
  
  execute_code = \
      '''
      (cog-execute!
          (ExecutionOutputLink
              (GroundedSchemaNode \"py: add_link\")
              (ListLink
                  (ConceptNode \"one\")
                  (ConceptNode \"two\")
              )
          )
      )
      '''
  scheme_eval(atomspace, execute_code)
  
  print "execute: cog-execute"
  if (executed):
      print "add_link - executed successfully"
  else:
      print "add_link - did NOT execute"
  
  executed = False
  execute_atom( atomspace,
      ExecutionOutputLink( 
          GroundedSchemaNode("py: add_link"),
          ListLink(
              ConceptNode("one"),
              ConceptNode("two") 
          )
      )
  )
  print "execute: execute_atom"
  if (executed):
      print "add_link - executed successfully"
  else:
      print "add_link - did NOT execute"
  
  
  finalize_opencog()
  del atomspace
  
subject: Use new type constructor in utilities.py