class_docstr: AirDialogue Teacher.
  
  This also contains other files (dev_kb.json, train_kb.json) with flight data about
  return flights, price, connections, flight airlines, departure times, and other
  flight information. More information and related paper can be found at
  <https://github.com/google/airdialogue>.
class_docstr_tok: ["AirDialogue","Teacher",".","This","also","contains","other","files","(","dev_kb.json",",","train_kb.json",")","with","flight","data","about","return","flights",",","price",",","connections",",","flight","airlines",",","departure","times",",","and","other","flight","information",".","More","information","and","related","paper","can","be","found","at","<","https",":","\/\/github.com\/google\/airdialogue",">","."]
code: def num_examples(self):
      examples = 0
      for data in self.messages:
          examples += len(data) // 2
      return examples
  
file_path: ParlAI/parlai/tasks/airdialogue/agents.py
imports: from parlai.core.teachers import FixedDialogTeacher
  from parlai.core.message import Message
  from parlai.utils.io import PathManager
  from .build import build
  import os
  import json
label_desc: Use image node_id 5 for calling the AirDialogueTeacher obj's underlying member method code with example usage: obj.num_examples() and returns: examples