code: def on_batch_end(self, ctx, batch_index):
      pass
  
file_path: FATE/python/fate/ml/utils/callbacks.py
imports: from fate.ml.evaluation.tool import get_metric_names, get_specified_metrics
  from fate.ml.abc.module import Module
label_desc: Use image node_id 7 for calling the Callbacks obj's underlying member method code with example usage: obj.on_batch_end(ctx, batch_index) without return types