code: def test_calculate_correct_coefficient(self):
      with self.test_session():
          f = tf.constant([1.0, 2.0, 3.0, 4.0])
          h = tf.constant([2.0, 3.0, 8.0, 1.0])
          self.assertAllClose(
              get_control_variate_coef(f, h).eval(), 0.03448276
          )
  
file_path: edward/tests/util/get_control_variate_coef_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
  from edward.util.tensorflow import get_control_variate_coef
label_desc: Use image node_id 1 for calling the test_get_control_variate_coef obj's underlying member method code with example usage: obj.test_calculate_correct_coefficient() without return types