code: def _test_bpe_dropout(self, **dict_args):
      pp = ParlaiParser(False, False)
      DictionaryAgent.add_cmdline_args(pp, partial_opt=None)
      opt = pp.parse_kwargs(bpe_dropout=0.5, **dict_args)
      da = DictionaryAgent(opt)
      da.set_tokenization_mode(TokenizationMode.TEST_TIME_TEXT)
      s = (
          "Lorem ipsum dolor sit amet, consectetur adipiscing elit. "
          "Donec vitae metus sollicitudin, ullamcorper tortor ut, rhoncus lacus. "
          "Praesent sollicitudin commodo turpis, ut pharetra tortor gravida nec."
      )
      no_dropout = da.txt2vec(s)
      da.set_tokenization_mode(TokenizationMode.TRAIN_TIME_TEXT)
      not_the_same = 0
      for _ in range(30):
          r = da.txt2vec(s)
          assert da.vec2txt(r) == s
          if r != no_dropout:
              not_the_same += 1
      assert not_the_same > 0
  
imports: from parlai.core.build_data import modelzoo_path
  from parlai.core.dict import find_ngrams
  from parlai.core.params import ParlaiParser
  from parlai.core.dict import DictionaryAgent, TokenizationMode
  from parlai.core.opt import Opt
  import parlai.scripts.build_dict
  from parlai.utils.io import PathManager
  import parlai.utils.testing
  import os
  import shutil
  import unittest
  import pytest
label_desc: Use image node_id 1 for calling the TestBpeDropout obj's underlying member method code with example usage: obj._test_bpe_dropout() without return types