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: Return health of the TPU.
code: def health(self):
      """Return health of the TPU."""
      return self._get_tpu_property("health")
  
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 14 for calling the Client obj's underlying member method code with example usage: obj.health() and returns: self