code: def test_call_register_ordering(self):
      port = portpicker.pick_unused_port()
      address = "localhost:{}".format(port)
  
      # Create client succeeds before server start and registration
      client = rpc_ops.GrpcClient(address)
  
      # Create client with list_registered_methods fails before server is started.
      with self.assertRaises(errors.DeadlineExceededError):
          rpc_ops.GrpcClient(
              address,
              name="client1",
              list_registered_methods=True,
              timeout_in_ms=1,
          )
  
      v = variables.Variable(initial_value=0, dtype=dtypes.int64)
  
      @eager_def_function.function(
          input_signature=[tensor_spec.TensorSpec([], dtypes.int64)]
      )
      def assign_add(a):
          v.assign_add(a)
  
      @eager_def_function.function(input_signature=[])
      def read_var():
          return v.value()
  
      server = rpc_ops.GrpcServer(address)
  
      def start_server():
          # Delay server start to test whether client creation also waits
          # till server is up.
          time.sleep(1)
          server.register("assign_add", assign_add)
          server.start()
  
      t = threading.Thread(target=start_server)
      t.start()
  
      # Create same "client1" again should succeed.
      client1_with_listed_methods = rpc_ops.GrpcClient(
          address, name="client1", list_registered_methods=True
      )
  
      result_or = client1_with_listed_methods.assign_add(
          variables.Variable(2, dtype=dtypes.int64)
      )
      self.assertAllEqual(result_or.is_ok(), True)
  
      result_or = client.call(
          "assign_add", [variables.Variable(2, dtype=dtypes.int64)]
      )
      self.assertAllEqual(result_or.is_ok(), True)
  
      # Create client with registered methods
      client2_with_listed_methods = rpc_ops.GrpcClient(
          address=address, name="client2", list_registered_methods=True
      )
  
      result_or = client2_with_listed_methods.assign_add(
          variables.Variable(2, dtype=dtypes.int64)
      )
      self.assertAllEqual(result_or.is_ok(), True)
  
      self.assertAllEqual(v, 6)
  
      # Register new method after server started.
      with self.assertRaisesRegex(
          errors.FailedPreconditionError,
          "All methods must be registered before starting the server",
      ):
          server.register("read_var", read_var)
  
imports: import threading
  import time
  import numpy
  import portpicker
  from tensorflow.python.distribute.experimental.rpc import rpc_ops
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import config
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import data_flow_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import resource_variable_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.util import nest
label_desc: Use image node_id 9 for calling the RpcOpsTest obj's underlying member method code with example usage: obj.test_call_register_ordering() and returns: v