code: def test_ctc(self):
      (
          activations,
          labels,
          input_length,
          expected_costs,
          expected_grads,
      ) = setup_ctc_case()
      self.check_ctc(
          activations,
          labels,
          input_length,
          expected_costs,
          expected_grads,
      )
  
imports: from __future__ import division, absolute_import, print_function
  import unittest
  import numpy
  import theano
  import theano.tensor
  from theano.tests import unittest_tools
  import theano.gpuarray
  from theano.gpuarray.ctc import gpu_ctc, GpuConnectionistTemporalClassification
  from theano.tensor.nnet.ctc import ctc, ctc_available, ConnectionistTemporalClassification
  from theano.tensor.nnet.tests.test_ctc import setup_torch_case, setup_ctc_case, setup_grad_case
  from .config import mode_with_gpu, mode_without_gpu
label_desc: Use image node_id 12 for calling the TestCTC obj's underlying member method code with example usage: obj.test_ctc() without return types