code: def setUp(self):
      super(DeviceUtilTest, self).setUp()
      context._reset_context()
  
imports: from absl.testing import parameterized
  from tensorflow.core.protobuf import tensorflow_server_pb2
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import device_util
  from tensorflow.python.distribute import multi_worker_test_base
  from tensorflow.python.eager import context
  from tensorflow.python.framework import ops
  from tensorflow.python.platform import test
  from tensorflow.python.training import server_lib
label_desc: Use image node_id 1 for calling the DeviceUtilTest obj's underlying member method code with example usage: obj.setUp() without return types