code: def test_tpu_replicated_variable_update(self):
      batch_size = 32
      num_feature_in = 16
  
      x = np.random.rand(batch_size, num_feature_in).astype(np.float32)
      w_init = np.random.rand(batch_size, num_feature_in).astype(
          np.float32
      )
  
      w0 = variables_lib.Variable(
          w_init, dtype=dtypes.float32, name="w0"
      )
      w1 = variables_lib.Variable(
          w_init, dtype=dtypes.float32, name="w1"
      )
      self.evaluate(variables_lib.global_variables_initializer())
      w = tpu_replicated_variable.TPUReplicatedVariable([w0, w1])
  
      # Make a copy of x so that `w` and `x` do not share the same buffer.
      # See b/195972684.
      self.evaluate(w.assign(x.copy()))
      result = self.evaluate(w.read_value())
      self.assertAllClose(result, x)
      self.check_replicated_variables_all_the_same(w)
  
      x1 = np.random.rand(batch_size, num_feature_in).astype(np.float32)
      self.evaluate(w.assign_sub(x1))
      result = self.evaluate(w.read_value())
      self.assertAllClose(result, np.subtract(x, x1))
      self.check_replicated_variables_all_the_same(w)
  
      x2 = np.random.rand(batch_size, num_feature_in).astype(np.float32)
      self.evaluate(w.assign(x.copy()))
      self.evaluate(w.assign_add(x2))
      result = self.evaluate(w.read_value())
      self.assertAllClose(result, np.add(x, x2))
      self.check_replicated_variables_all_the_same(w)
  
file_path: tensorflow/tensorflow/python/distribute/tpu_replicated_variable_test.py
imports: from __future__ import division
  from __future__ import print_function
  import os
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.checkpoint import checkpoint
  from tensorflow.python.checkpoint import checkpoint_options
  from tensorflow.python.distribute import tpu_replicated_variable
  from tensorflow.python.eager import test
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import variables
label_desc: Use image node_id 2 for calling the TPUReplicatedVariableTest obj's underlying member method code with example usage: obj.test_tpu_replicated_variable_update() without return types