code: def get_punctuation_regex(language):
      global _PUNCTUATION_REGEXES
      if language not in _PUNCTUATION_REGEXES:
          pattern = r"|".join(
              re.escape(p) for p in get_punctuation(language)
          )
          _PUNCTUATION_REGEXES[language] = re.compile(pattern)
      return _PUNCTUATION_REGEXES[language]
  
imports: from __future__ import unicode_literals
  import re
  import string
label_desc: Use image node_id 3 for calling a global function with example usage: get_punctuation_regex(language) and returns: _PUNCTUATION_REGEXES