code: def test_text_2_ids(self):
      data_file_path = self.create_test_data()
      tokenizer = RegExTokenizer(regex=DEFAULT_REGEX)
      tokenizer.build_vocab_from_csv(data_csv_file=data_file_path)
  
      ids = tokenizer.text_to_ids("Zc")
      assert ",".join(list(map(lambda x: str(x), ids))) == "1,11"
  
file_path: NeMo/tests/collections/nlp/test_regex_tokenizer.py
imports: import tempfile
  import pytest
  from nemo.collections.common.tokenizers.regex_tokenizer import RegExTokenizer
label_desc: Use image node_id 4 for calling the TestRegexTokenizer obj's underlying member method code with example usage: obj.test_text_2_ids() without return types