code: def test_is_punctuation(self):
      self.assertTrue(_is_punctuation("-"))
      self.assertTrue(_is_punctuation("$"))
      self.assertTrue(_is_punctuation("`"))
      self.assertTrue(_is_punctuation("."))
  
      self.assertFalse(_is_punctuation("A"))
      self.assertFalse(_is_punctuation(" "))
  
file_path: texar/tests/data/tokenizers/bert_tokenizer_utils_test.py
imports: import tensorflow
  from texar.tf.data.tokenizers.bert_tokenizer_utils import BasicTokenizer, WordpieceTokenizer, _is_control, _is_punctuation, _is_whitespace
label_desc: Use image node_id 7 for calling the BERTTokenizerUtilsTest obj's underlying member method code with example usage: obj.test_is_punctuation() without return types