code: def launch(jobs, launcher_fn):
      print("Launching...")
      jobs = jobs.copy()
      np.random.shuffle(jobs)
      print("Making job directories:")
      for job in tqdm.tqdm(jobs, leave=False):
          os.makedirs(job.output_dir, exist_ok=True)
      commands = [job.command_str for job in jobs]
      launcher_fn(commands)
      print(f"Launched {len(jobs)} jobs!")
  
imports: import argparse
  import copy
  import hashlib
  import json
  import os
  import shlex
  import shutil
  import sys
  import numpy
  import tqdm
  from domainbed import algorithms
  from domainbed import command_launchers
  from domainbed import datasets
  from domainbed.lib import misc
label_desc: Use image node_id 3 for calling the Job obj's underlying member method code with example usage: obj.launch(jobs, launcher_fn) without return types