class_docstr: Simple interactive world involving just two agents talking.
  
  In more sophisticated worlds the environment could supply information, e.g. in
  tasks/convai2 both agents are given personas, so a world class should be written
  especially for those cases for given tasks.
code: def __init__(self, opt, agents, shared=None):
      super().__init__(opt, agents, shared)
      self.init_contexts(shared=shared)
      self.turn_cnt = 0
  
file_path: ParlAI/parlai/tasks/interactive/worlds.py
imports: from copy import deepcopy
  from typing import Optional
  from parlai.core.opt import Opt
  from parlai.core.params import ParlaiParser
  from parlai.core.worlds import DialogPartnerWorld, validate
  from parlai.core.message import Message
label_desc: Use image node_id 2 to create a new InteractiveWorld object from inherited base classes: DialogPartnerWorld with example: obj = InteractiveWorld(opt, agents, shared)