code: def before_run(self, run_context):  # pylint: disable=unused-argument
      return tf.train.SessionRunArgs(self._global_step_tensor)
  
imports: import delta.compat
  from bisect import bisect_right
  from absl import logging
label_desc: Use image node_id 5 for calling the EpochHook obj's underlying member method code with example usage: obj.before_run(run_context) and returns: tf