class_docstr: Test the Ubuntu Corpus trainer class.
class_docstr_tok: ["Test","the","Ubuntu","Corpus","trainer","class","."]
code: def tearDown(self):
      super().tearDown()
  
      self._remove_data()
  
imports: from unittest.mock import Mock
  from io import BytesIO
  import tarfile
  import os
  from tests.base_case import ChatBotTestCase
  from chatterbot.trainers import UbuntuCorpusTrainer
label_desc: Use image node_id 2 for calling the UbuntuCorpusTrainerTestCase obj's underlying member method code with example usage: obj.tearDown() without return types