code: def _re_unescape_replacement(match):
      # type: (Match[str]) -> str
      group = match.group(1)
      if group[0] in _alphanum:
          raise ValueError("cannot unescape '\\\\%s'" % group[0])
      return group
  
imports: from __future__ import absolute_import, division, print_function
  import array
  import atexit
  import os
  import re
  import sys
  import zlib
label_desc: Use image node_id 5 for calling a global function with example usage: _re_unescape_replacement(match) and returns: group