code: def test_simple_function_ok(nprocs):
      args = None
  
      def simple_func(args):
          # NOP
          return 0
  
      launch(simple_func, args, nprocs)
  
file_path: espnet/test/test_distributed_launch.py
imports: import argparse
  import itertools
  import os
  import sys
  from multiprocessing import Queue
  import pytest
  from espnet.distributed.pytorch_backend.launch import WorkerError, launch
label_desc: Use image node_id 1 for calling a global function with example usage: test_simple_function_ok(nprocs) and returns: int