message: Use importlib instead of __import__ since that;s the recommended way.
diff: @@ -18,6 +18,7 @@ from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  +import importlib
  import os
  import pkgutil
  import re
  @@ -48,7 +49,7 @@ def find_modules():
  for _, name, _ in pkgutil.walk_packages(
  core.__path__, prefix=core.__name__ + '.'):
  try:
  - tf_modules.append(__import__(name, fromlist=['']))
  + tf_modules.append(importlib.import_module(name))
  except (ImportError, AttributeError):
  pass
  @@ -105,8 +106,10 @@ def load_tests(unused_loader, tests, unused_ignore):
  tf_modules = filter_on_submodules(tf_modules, FLAGS.module)
  if FLAGS.list:
  + print('**************************************************')
  for mod in tf_modules:
  print(mod.__name__)
  + print('**************************************************')
  return tests
  for module in tf_modules:
  