code: def test_no_action(self):
      sys.argv = [
          "",
          "-a",
          "net_segment",
          "-c",
          os.path.join("config", "default_segmentation.ini"),
      ]
      with self.assertRaisesRegexp(SystemExit, ""):
          net_run.main()
  
file_path: NiftyNet/tests/entry_point_test.py
imports: from __future__ import absolute_import, print_function
  import os
  import sys
  import tensorflow
  import net_autoencoder
  import net_gan
  import net_regress
  import net_run
  import net_segment
  from tests.niftynet_testcase import NiftyNetTestCase
label_desc: Use image node_id 3 for calling the EntryPointTest obj's underlying member method code with example usage: obj.test_no_action() without return types