code: def test_all(self):
      # Run the tester in a sub-process, to make sure there is only one
      # thread (for reliable signal delivery).
      script = support.findfile("_test_eintr.py")
      script_helper.run_test_script(script)
  
file_path: cpython/Lib/test/test_eintr.py
imports: import os
  import signal
  import unittest
  from test import support
  from test.support import script_helper
label_desc: Use image node_id 1 for calling the EINTRTests obj's underlying member method code with example usage: obj.test_all() without return types