code: def hostfile(request, hostfile_content, tmpdir):
      if hostfile_content is None:
          return request.param
      hostfile_path = tmpdir.join("hostfile")
      with open(hostfile_path, "w") as f:
          for line in hostfile_content:
              f.write(line + "\n")
      return str(hostfile_path)
  
imports: import pytest
  import time
  import os
  import mii
  from types import SimpleNamespace
  from typing import Union
  from deepspeed.launcher.runner import DLTS_HOSTFILE
  import deepspeed.comm
label_desc: Use image node_id 8 for calling a global function with example usage: hostfile(request, hostfile_content, tmpdir) and returns: str, request