code: def tokenize(self, text):
      if len(text) == 0:
          return []
      if six.PY3 and not isinstance(text, six.string_types):
          text = text.decode(self.encoding)
      if six.PY2 and isinstance(text, str):
          text = text.decode(self.encoding)
  
      res = []
      for match in self.pat.finditer(text):
          match_group = match.group(0)
          if match.groups()[-1]:
              if self.lower:
                  match_group = match_group.lower()
              words, _ = _wordpiece(
                  match_group,
                  vocab=self.vocab,
                  unk_token=self.unk_token,
                  prefix=self.prefix,
                  sentencepiece_prefix=self.sentencepiece_prefix,
              )
          else:
              words = [match_group]
          res += words
      return res
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import logging
  import os
  import re
  import sys
  import tempfile
  from functools import partial
  from pathlib import Path
  import six
  from tqdm import tqdm
  import numpy
  from disco_diffusion_ernievil_base.vit_b_16x.ernievil2.transformers.file_utils import _fetch_from_remote
  import io
label_desc: Use image node_id 3 for calling the ErnieTokenizer obj's underlying member method code with example usage: obj.tokenize(text) and returns: res, list