code: def setUp(self):
      super().setUp()
      # Need at least 2 devices for distribution related tests.
      cpus = tf.config.list_physical_devices("CPU")
      context._reset_context()
      tf.config.set_logical_device_configuration(
          cpus[0],
          [
              tf.config.LogicalDeviceConfiguration(),
              tf.config.LogicalDeviceConfiguration(),
          ],
      )
  
file_path: keras/keras/backend/tensorflow/distribute_test.py
imports: import numpy
  import pytest
  import tensorflow
  from tensorflow.python.eager import context
  from keras import backend
  from keras import layers
  from keras import models
  from keras import testing
  from keras.backend.tensorflow import trainer
label_desc: Use image node_id 1 for calling the DistributeTest obj's underlying member method code with example usage: obj.setUp() without return types