code: def _launch(args: List[str]):
      import sys
      import os
  
      if "RUN_UUID" not in os.environ:
          os.environ["RUN_UUID"] = experiment.generate_uuid()
  
      cwd = os.getcwd()
      if "PYTHONPATH" in os.environ:
          python_path = os.environ["PYTHONPATH"]
          print(python_path)
          os.environ["PYTHONPATH"] = f"{python_path}:{cwd}:{cwd}/src"
      else:
          os.environ["PYTHONPATH"] = f"{cwd}:{cwd}/src"
  
      cmd = [sys.executable, "-u", "-m", "torch.distributed.run", *args]
      print(cmd)
      try:
          process = subprocess.Popen(cmd, env=os.environ)
          process.wait()
      except Exception as e:
          logger.log("Error starting launcher", Text.danger)
          raise e
  
      if process.returncode != 0:
          logger.log("Launcher failed", Text.danger)
          raise subprocess.CalledProcessError(
              returncode=process.returncode, cmd=cmd
          )
  
imports: import argparse
  import os
  import subprocess
  import sys
  import threading
  import time
  from typing import List
  from labml import logger, experiment
  from labml.experiment import generate_uuid
  from labml.internal.app import AppTracker, SimpleAppTrackDataSource
  from labml.internal.app.logs import AppConsoleLogs
  from labml.internal.app.url import AppUrlResponseHandler
  from labml.internal.lab import get_app_url_for_handle
  from labml.logger import Text
  from labml.utils.validators import ip_validator
label_desc: Use image node_id 3 for calling a global function with example usage: _launch(args) without return types