code: def testInterrupt(self):
      from signal import SIGINT
  
      excmess = "KeyboardInterrupt"
      for np in (1, 2):
          for rank in range(0, np):
              args = ["--rank", str(rank), "--interrupt"]
              status, stdout, stderr = self.execute(args, np)
              if not on_pypy:
                  self.assertEqual(status, SIGINT + 128)
              self.assertMPIAbort(stdout, stderr, excmess)
  
imports: import sys
  import os
  import shlex
  import shutil
  import warnings
  import subprocess
  import unittest
  import mpi4py
label_desc: Use image node_id 6 for calling the TestRunScript obj's underlying member method code with example usage: obj.testInterrupt() without return types