code: def _bad_path(opt):
      # Build the data if it doesn't exist.
      build(opt)
      dt = opt["datatype"].split(":")[0]
      if dt == "valid" or dt == "test":
          dt += "_bad"
      return os.path.join(
          opt["datapath"],
          "saferdialogues",
          "saferdialogues_dataset",
          dt + ".txt",
      )
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  import os
  import copy
  from parlai.core.teachers import ParlAIDialogTeacher
  from .build import build
label_desc: Use image node_id 2 for calling a global function with example usage: _bad_path(opt) and returns: os