code: def test_linear_regression(self):
      self._test_linear_regression(True, tf.float32)
      self._test_linear_regression(False, tf.float32)
      self._test_linear_regression(True, tf.float64)
      self._test_linear_regression(False, tf.float64)
  
file_path: edward/tests/inferences/metropolishastings_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import edward
  import numpy
  import tensorflow
  from edward.models import Normal, Empirical
label_desc: Use image node_id 4 for calling the test_metropolishastings_class obj's underlying member method code with example usage: obj.test_linear_regression() without return types