class_docstr: Unit tests for cntk_utils.
code: def test_entropy(self):
      i = input_variable((2))
  
      np.testing.assert_almost_equal(
          negative_of_entropy_with_softmax(i).eval(
              {i: [[0.5, 0.5], [1000, 1]]}
          ),
          [-0.693147181, 0],
      )
  
file_path: CNTK/bindings/python/cntk/contrib/deeprl/tests/cntk_utils_test.py
imports: import unittest
  import numpy
  from cntk.contrib.deeprl.agent.shared.cntk_utils import huber_loss, negative_of_entropy_with_softmax
  from cntk.ops import input_variable
label_desc: Use image node_id 2 for calling the CNTKUtilsTest obj's underlying member method code with example usage: obj.test_entropy() without return types