docstr: Add command-line arguments specifically for this agent.
docstr_tok: ["Add","command-line","arguments","specifically","for","this","agent","."]
code: def add_cmdline_args(
      cls, parser: ParlaiParser, partial_opt: Optional[Opt] = None
  ) -> ParlaiParser:
      """
      Add command-line arguments specifically for this agent.
      """
      Gpt2Agent.add_cmdline_args(parser, partial_opt=partial_opt)
      AbstractGeneratorRerankAgentMixin.add_cmdline_args(
          parser, partial_opt
      )
      reranker_class = cls.get_reranker_class() or AbstractReranker
      reranker_class.add_cmdline_args(parser, partial_opt=partial_opt)
      return parser
  
imports: import logging
  import torch
  from abc import ABC, abstractmethod, abstractclassmethod
  from typing import List, Optional, Tuple
  from parlai.agents.transformer.transformer import TransformerGeneratorAgent
  from parlai.core.agents import create_agent_from_model_file, Agent
  from parlai.core.build_data import modelzoo_path
  from parlai.core.message import Message
  from parlai.core.opt import Opt
  from parlai.core.params import ParlaiParser
  from parlai.core.torch_agent import TorchAgent
  from parlai.utils.strings import normalize_reply
  from parlai.utils.torch import argsort
  from parlai.agents.hugging_face.gpt2 import Gpt2Agent
  from projects.msc.agents.long_tga import TransformerVariantAgent
label_desc: Use image node_id 1 for calling the AbstractGpt2RerankAgent obj's underlying member method code with example usage: obj.add_cmdline_args(cls, parser, partial_opt) and returns: parser