code: def _tpu_host_device_name(job, task):
      """Returns the device name for the CPU device on `task` of `job`."""
      if job is None:
          return "/task:%d/device:CPU:0" % task
      else:
          return "/job:%s/task:%d/device:CPU:0" % (job, task)
  
imports: import numpy
  from tensorflow.core.protobuf.tpu import topology_pb2
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 2 for calling a global function with example usage: _tpu_host_device_name(job, task) and returns: unknown, unknown