code: def num_episodes(self):
      return self.num_ep
  
file_path: ParlAI/parlai/tasks/amazon_qa/agents.py
imports: from parlai.core.teachers import FixedDialogTeacher
  from parlai.utils.io import PathManager
  from .build import build, RESOURCES
  import os
  import json
label_desc: Use image node_id 2 for calling the DefaultTeacher obj's underlying member method code with example usage: obj.num_episodes() and returns: self