code: def __init__(self, opt, shared=None):
      super().__init__(opt, shared)
      if shared is not None:
          # make sure the dialogue token appears
          self.dict[TOKEN_DIALOG] = 9999999
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from itertools import chain
  from functools import lru_cache
  import torch
  import numpy
  from parlai.utils.torch import padded_tensor
  from parlai.utils.misc import round_sigfigs
  from parlai.agents.transformer.transformer import TransformerGeneratorAgent
  from .modules import EndToEndModel
  from parlai.tasks.wizard_of_wikipedia.agents import TOKEN_KNOWLEDGE
label_desc: Use image node_id 1 to create a new TwoStageAgent object from inherited base classes: _GenericWizardAgent with example: obj = TwoStageAgent(opt, shared)