code: def values_name_func(testcase_func, param_num, param):
      return "_".join([testcase_func.__name__] + list(param.args))
  
imports: import contextlib
  import io
  import itertools
  import os
  import sys
  import warnings
  import mock
  from parameterized import parameterized
  import pytest
  import unittest
  from horovod.common.util import gloo_built, mpi_built
  from horovod.runner.common.util import safe_shell_exec
  from horovod.runner import _HorovodArgs
  from horovod.runner.launch import _check_all_hosts_ssh_successful, _run
  from horovod.runner.mpi_run import mpi_available
  from common import capture
label_desc: Use image node_id 1 for calling a global function with example usage: values_name_func(testcase_func, param_num, param) and returns: str