code: def __init__(self, state):
      self.state = state
  
file_path: horovod/test/integration/data/elastic_tensorflow_keras_main.py
imports: import argparse
  import json
  import os
  import psutil
  import time
  import tensorflow
  import horovod.tensorflow.keras
label_desc: Use image node_id 1 to create a new TestCallback object from inherited base classes: tf.keras.callbacks with example: obj = TestCallback(state)