class_docstr: Generates a controllable_gen version of a ParlAI task, i.e., for tasks with multi-
  turn dialogues (episodes), this will generate a task with single example episodes,
  in which we append to the context a special classification token.
class_docstr_tok: ["Generates","a","controllable_gen","version","of","a","ParlAI","task",",","i.e.",",","for","tasks","with","multi-","turn","dialogues","(","episodes",")",",","this","will","generate","a","task","with","single","example","episodes",",","in","which","we","append","to","the","context","a","special","classification","token","."]
docstr: Return save path for the controllable gen data.
  
  :param datapath:
      path to ParlAI Data
  :param date:
      current date
  
  :return path:
      return path to save
docstr_tok: ["Return","save","path","for","the","controllable","gen","data",".",":","param","datapath",":","path","to","ParlAI","Data",":","param","date",":","current","date",":","return","path",":","return","path","to","save"]
code: def _get_save_path(self, datapath: str, date: str) -> str:
      """
      Return save path for the controllable gen data.
  
      :param datapath:
          path to ParlAI Data
      :param date:
          current date
  
      :return path:
          return path to save
      """
      return os.path.join(
          datapath,
          f"{self.original_task_name.replace(':', '_')}_flattened_controllable_gen_{date}",
      )
  
imports: from parlai.core.params import ParlaiParser
  from parlai.core.message import Message
  from parlai.core.opt import Opt
  from parlai.core.teachers import FixedDialogTeacher
  from parlai.utils.io import PathManager
  import parlai.utils.logging
  from parlai.utils.typing import TShared
  from parlai.tasks.genderation_bias.build import build
  from parlai.tasks.genderation_bias.utils import flatten_and_classify, get_original_task_module
  from copy import deepcopy
  import datetime
  import glob
  import json
  import os
  from tqdm import tqdm
  from typing import List, Optional, Tuple
label_desc: Use image node_id 5 for calling the ControllableTaskTeacher obj's underlying member method code with example usage: obj._get_save_path(datapath, date) and returns: os