code: def __init__(self, opt, shared=None):
      opt = copy.deepcopy(opt)
      task = opt.get("task", "iwslt14:de_en")
      if ":" not in task:
          # default to de_en
          task_name = "de_en"
      else:
          task_name = task.split(":")[1]
      source, target = task_name.split("_")
      opt["datafile"] = _path(opt, source, target)
  
      super().__init__(opt, shared)
  
file_path: ParlAI/parlai/tasks/iwslt14/agents.py
imports: from parlai.core.teachers import DialogTeacher
  from parlai.utils.io import PathManager
  from .build import build
  import copy
  import os
label_desc: Use image node_id 1 to create a new DefaultTeacher object from inherited base classes: DialogTeacher with example: obj = DefaultTeacher(opt, shared)