code: def __init__(
      self,
      args,
      src_dict,
      tgt_dict,
      char_source_dict=None,
      char_target_dict=None,
  ):
      super().__init__(args)
      self.src_dict = src_dict
      self.tgt_dict = tgt_dict
      self.char_source_dict = char_source_dict
      self.char_target_dict = char_target_dict
  
imports: import os
  from collections import OrderedDict
  from typing import Dict, List, Optional, Tuple
  import numpy
  from fairseq import data, options
  from fairseq.data import ConcatDataset, LanguagePairDataset, NoisingDataset
  from fairseq.data.multi_corpus_sampled_dataset import MultiCorpusSampledDataset
  from fairseq.data.noising import UnsupervisedMTNoising
  from fairseq.tasks import LegacyFairseqTask, register_task
  from pytorch_translate import constants, utils
  from pytorch_translate.data import char_data, data, dictionary, utils, weighted_data
  from pytorch_translate.data.language_pair_upsampling_dataset import LanguagePairUpsamplingDataset
  from pytorch_translate.research.multisource import multisource_data
label_desc: Use image node_id 2 to create a new PytorchTranslateTask object from inherited base classes: LegacyFairseqTask with example: obj = PytorchTranslateTask(args, src_dict, tgt_dict, char_source_dict, char_target_dict)