code: def _setup_pre_spawn(self) -> None:
      self.master_addr = "localhost"
      os.environ["MASTER_ADDR"] = "localhost"
      self._has_master_port = "MASTER_PORT" in os.environ
      if self._has_master_port:
          self.master_port = os.environ["MASTER_PORT"]
      else:
          try:
              from caffe2.torch.fb.common.utils import get_free_port
  
              self.master_port = str(get_free_port())
          except ImportError:
              self.master_port = "12375"
          os.environ["MASTER_PORT"] = self.master_port
  
      self._has_ucx_tls = "UCX_TLS" in os.environ
      if not self._has_ucx_tls:
          os.environ["UCX_TLS"] = "tcp,cuda"
      print('os.environ["UCX_TLS"] = {}'.format(os.environ["UCX_TLS"]))
  
imports: import os
  import sys
  import unittest
  from packaging.version import Version, parse
  import torch
  from torch import distributed
  from torch.utils import collect_env
  from torch.testing._internal import common_utils
  from torch.testing._internal import common_distributed
  from apex.transformer._ucc_util import HAS_UCC
label_desc: Use image node_id 1 for calling the UccDistributedTestBase obj's underlying member method code with example usage: obj._setup_pre_spawn() without return types