code: def _path(task, opt):
      # Build the data if it doesn't exist.
      build(opt)
      prefix = os.path.join(
          opt["datapath"], "dialog-bAbI", "dialog-bAbI-tasks"
      )
      suffix = ""
      dt = opt["datatype"].split(":")[0]
      if dt == "train":
          suffix = "trn"
      elif dt == "test":
          suffix = "tst"
      elif dt == "valid":
          suffix = "dev"
      datafile = os.path.join(
          prefix,
          "{tsk}-{type}.txt".format(tsk=tasks[int(task)], type=suffix),
      )
  
      if opt["task"].split(":")[2] != "6":
          cands_datafile = os.path.join(
              prefix, "dialog-babi-candidates.txt"
          )
      else:
          cands_datafile = os.path.join(
              prefix, "dialog-babi-task6-dstc2-candidates.txt"
          )
  
      return datafile, cands_datafile
  
file_path: ParlAI/parlai/tasks/dialog_babi/agents.py
imports: from parlai.core.teachers import FbDeprecatedDialogTeacher, MultiTaskTeacher
  from .build import build
  import copy
  import os
label_desc: Use image node_id 1 for calling a global function with example usage: _path(task, opt) and returns: datafile,  cands_datafile