code: def setUp(self):
      host = socket.gethostname()
      pid = os.getpid()
      rint = random.randint(0, 1000000)
  
      self.working_directory = os.path.join(
          tempfile.gettempdir(),
          f"autosklearn-unittest-tmp-dir-{host}-{pid}-{rint}",
      )
  
file_path: auto-sklearn/test/test_scripts/test_metadata_generation.py
imports: import json
  import os
  import random
  import shutil
  import socket
  import subprocess
  import tempfile
  import arff
  import numpy
  from autosklearn.metrics import CLASSIFICATION_METRICS, REGRESSION_METRICS
  import unittest
label_desc: Use image node_id 1 for calling the TestMetadataGeneration obj's underlying member method code with example usage: obj.setUp() without return types