class_docstr: NLTK tokenizer
class_docstr_tok: ["NLTK","tokenizer"]
code: def tokenize(text):
      return nltk.word_tokenize(text)
  
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  import re
  import string
  import zipfile
  import nltk
  from .._compat import to_string, to_unicode, unicode
  from ..utils import normalize_language
label_desc: Use image node_id 1 for calling the DefaultWordTokenizer obj's underlying member method code with example usage: obj.tokenize(text) and returns: nltk