class_docstr: Client for working with the Cloud TPU API.
  
  This client is intended to be used for resolving tpu name to ip addresses.
  
  It's recommended to use this library as a contextlib to utilize all
  functionality.
docstr: Returns the TPU metadata object from the TPU Get API call.
code: def _fetch_cloud_tpu_metadata(self):
      """Returns the TPU metadata object from the TPU Get API call."""
      service = self._tpu_service()
      try:
          r = (
              service.projects()
              .locations()
              .nodes()
              .get(name=self._full_name())
          )
          return r.execute()
      except Exception as e:
          raise ValueError(
              "Could not lookup TPU metadata from name '%s'. Please "
              "doublecheck the tpu argument in the TPUClusterResolver "
              "constructor. Exception: %s" % (self._tpu, e)
          )
  
imports: from concurrent import futures
  import datetime
  import json
  import logging
  import os
  import time
  import urllib
  from absl import flags
label_desc: Use image node_id 7 for calling the Client obj's underlying member method code with example usage: obj._fetch_cloud_tpu_metadata() and returns: r