code: def clone(self, op):
      raise NotImplementedError("return new instance like `op`")
  
imports: from __future__ import absolute_import, print_function, division
  from copy import copy, deepcopy
  from functools import wraps
  import logging
  import sys
  import unittest
  from parameterized import parameterized
  from nose.tools import assert_raises
  from six import integer_types
  from six.moves import StringIO
  import numpy
  import theano
  import theano.tensor
  from theano import config
label_desc: Use image node_id 3 for calling the T_OpContractMixin obj's underlying member method code with example usage: obj.clone(op) without return types