class_docstr: A TPU pod command runner.
class_docstr_tok: ["A","TPU","pod","command","runner","."]
code: def run(
      self,
      cmd,
      timeout=120,
      exit_on_fail=False,
      port_forward=None,
      with_output=False,
      environment_variables: Dict[str, object] = None,
      run_env="auto",  # Unused argument.
      ssh_options_override_ssh_key="",
      shutdown_after_run=False,
  ) -> str:
      with ThreadPoolExecutor(self.num_connections) as executor:
          results = executor.map(
              lambda i: self._command_runners[i].run(
                  cmd=cmd,
                  timeout=timeout,
                  exit_on_fail=exit_on_fail,
                  port_forward=port_forward,
                  with_output=with_output,
                  environment_variables=copy.deepcopy(
                      environment_variables
                  ),
                  run_env=run_env,
                  ssh_options_override_ssh_key=ssh_options_override_ssh_key,
                  shutdown_after_run=shutdown_after_run,
              ),
              range(self._num_workers),
          )
      # Note: the `run` abstract function may return a string representing
      # representing command output, but this result is rarely used - especially
      # if the node is a worker (which a TPU pod is).
      # We return only the results from worker 0 which may not always be expected.
      return list(results)[0]
  
imports: import copy
  from concurrent.futures import ThreadPoolExecutor
  from types import ModuleType
  from typing import Any, Dict, Optional
  from ray._private import ray_constants
  from ray.autoscaler._private.command_runner import DockerCommandRunner, SSHCommandRunner
  from ray.autoscaler._private.gcp.node import GCPTPUNode
  from ray.autoscaler.command_runner import CommandRunnerInterface
  from ray.autoscaler.node_provider import NodeProvider
label_desc: Use image node_id 3 for calling the TPUCommandRunner obj's underlying member method code with example usage: obj.run(cmd, timeout, exit_on_fail, port_forward, with_output, environment_variables, run_env, ssh_options_override_ssh_key, shutdown_after_run) and returns: list