code: def test_filters(self):
      language = "en"
      before = get_stop_words(language, False)
      letter = random.choice(random.choice(before))
  
      def remove_letter(stopwords, language):
          return [word for word in stopwords if letter not in word]
  
      stop_words.add_filter(remove_letter)
      after = get_stop_words(language, False)
      for stopword in after:
          self.assertFalse(letter in stopword)
      self.assertTrue(stop_words.remove_filter(remove_letter))
  
file_path: python-stop-words/stop_words/tests.py
imports: import random
  from unittest import TestCase
  from unittest import TestSuite
  from unittest import TestLoader
  import stop_words
  from stop_words import get_stop_words
  from stop_words import safe_get_stop_words
  from stop_words import StopWordError
  from stop_words import LANGUAGE_MAPPING
  from stop_words import AVAILABLE_LANGUAGES
label_desc: Use image node_id 8 for calling the StopWordsTestCase obj's underlying member method code with example usage: obj.test_filters() and returns: unknown