code: def mock_request_compute_metadata(*args, **kwargs):
      del kwargs  # Unused.
      if args[0] == "project/project-id":
          return "test-project"
      elif args[0] == "instance/zone":
          return "projects/test-project/locations/us-central1-c"
      elif args[0] == "instance/network-interfaces/0/ip":
          return "10.128.1.2"
      return ""
  
imports: import os
  import six
  from six.moves.urllib.error import URLError
  from tensorflow.core.protobuf.tpu import topology_pb2
  from tensorflow.python.client import session
  from tensorflow.python.distribute.cluster_resolver.tpu import tpu_cluster_resolver
  from tensorflow.python.eager import context
  from tensorflow.python.framework import config
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.training import server_lib
  from tensorflow.python.util import compat
label_desc: Use image node_id 1 for calling a global function with example usage: mock_request_compute_metadata() and returns: str, str, str, str