code: def assertFunctionContainsN(self, f, op, N):
      return self.assertFunctionContains(f, op, min=N, max=N)
  
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 4 for calling the TestOptimizationMixin obj's underlying member method code with example usage: obj.assertFunctionContainsN(f, op, N) and returns: self