code: def __init__(
      self, methodName="runTest"
  ):  # pylint: disable=invalid-name
      super().__init__(methodName)
      physical_devices = tf.config.experimental.list_physical_devices(
          "CPU"
      )
      tf.config.experimental.set_virtual_device_configuration(
          physical_devices[0],
          [
              tf.config.experimental.VirtualDeviceConfiguration(),
              tf.config.experimental.VirtualDeviceConfiguration(),
          ],
      )
      if extensions.tpu_devices():
          resolver = tf.distribute.cluster_resolver.TPUClusterResolver(
              tpu="local"
          )
          tf.tpu.experimental.initialize_tpu_system(resolver)
  
imports: import functools
  import itertools
  from absl import flags
  from absl.testing import parameterized
  from jax import lax
  import numpy
  import tensorflow.compat.v2
  from trax.tf_numpy import extensions
  import trax.tf_numpy.numpy
label_desc: Use image node_id 1 to create a new ExtensionsTest object from inherited base classes: tf.test, parameterized with example: obj = ExtensionsTest(methodName)