code: def test_create_word_finder_regex(self):
      words = ["pt", "ct", "s"]
      word_finder_re = c4_wsrs_utils.create_word_finder_regex(words)
      string = "the (pt's) #ct to feel drowsy."
      self.assertEqual(word_finder_re.findall(string), ["pt", "ct"])
  
file_path: datasets/tensorflow_datasets/text/c4_wsrs/c4_wsrs_utils_test.py
imports: import re
  from unittest import mock
  from absl.testing import absltest
  import numpy
  from tensorflow_datasets.text.c4_wsrs import c4_wsrs_utils
label_desc: Use image node_id 1 for calling the C4WsrsUtilsTest obj's underlying member method code with example usage: obj.test_create_word_finder_regex() without return types