code: def __init__(self, tpu_map):
      self._tpu_map = tpu_map
  
imports: import datetime
  import json
  import os
  import time
  import urllib
  from absl import flags
  from tensorflow.python.platform import test
  from tensorflow.python.tpu.client import client
label_desc: Use image node_id 1 to create a new MockNodeClass object  with example: obj = MockNodeClass(tpu_map)