code: def run_command(**kwargs):
      command = ["mpiexec", "-n", "1", "python", script_under_test]
      for key, value in kwargs.items():
          command += ["-" + key, str(value)]
      return command
  
file_path: CNTK/Tests/EndToEndTests/CNTKv2Python/Examples/lightrnn_test.py
imports: import numpy
  import os
  import sys
  import subprocess
  import signal
  import re
  import pytest
  from cntk.ops.tests.ops_test_utils import cntk_device
  from cntk.cntk_py import DeviceKind_GPU
label_desc: Use image node_id 1 for calling a global function with example usage: run_command() and returns: command