code: def _spawn(self, func, *args):
      name = "process #%d" % len(self.processes)
      qin = self.mp.Queue()
      qout = self.mp.Queue()
      qerr = self.mp.Queue()
      qio = (qin, qout, qerr)
      args = qio + (func,) + args
      process = self.mp.Process(
          target=_run, name=name, args=args, daemon=True
      )
      process.start()
      self.processes.append(process)
      return qio
  
imports: import multiprocessing
  import queue
  import tempfile
  import unittest
  import torch
label_desc: Use image node_id 3 for calling the ClassificationMeterTest obj's underlying member method code with example usage: obj._spawn(func) and returns: qio