code: def test_read_value(self, replicator_fn, cross_replica):
      replicator = replicator_fn()
      if replicator is None:
          self.skipTest("No replicator supplied.")
  
      with replicator.scope():
          v = tf.Variable(0.0)
      if cross_replica:
          values = [v.read_value()]
      else:
          # TpuReplicator doesn't support pure eager mode.
          if isinstance(replicator, snt_replicator.TpuReplicator):
              read_value_fn = tf.function(v.read_value)
          else:
              read_value_fn = v.read_value
          values = replicator.run(read_value_fn)
          values = replicator.experimental_local_results(values)
      for component in v._values:
          for value in values:
              self.assertAllEqual(component.read_value(), value)
  
imports: import os
  from absl import logging
  from absl.testing import parameterized
  from sonnet.src import initializers
  from sonnet.src import test_utils
  from sonnet.src.distribute import replicator
  from sonnet.src.distribute import replicator_test_utils
  import tensorflow
label_desc: Use image node_id 6 for calling the ReplicatorTest obj's underlying member method code with example usage: obj.test_read_value(replicator_fn, cross_replica) without return types