code: def train(state):
      state.model.fit(
          dataset,
          steps_per_epoch=500 // hvd.size(),
          epochs=24 - state.epoch,
          callbacks=callbacks,
          verbose=1,
      )
  
imports: import argparse
  import tensorflow
  import horovod.tensorflow.keras
  from packaging import version
label_desc: Use image node_id 2 for calling a global function with example usage: train(state) without return types