code: def CUnescape(text):
      """Unescape a text string with C-style escape sequences to UTF-8 bytes."""
  
      def ReplaceHex(m):
          # Only replace the match if the number of leading back slashes is odd. i.e.
          # the slash itself is not escaped.
          if len(m.group(1)) & 1:
              return m.group(1) + "x0" + m.group(2)
          return m.group(0)
  
      # This is required because the 'string_escape' encoding doesn't
      # allow single-digit hex escapes (like '\xf').
      result = _CUNESCAPE_HEX.sub(ReplaceHex, text)
  
      if str is bytes:  # PY2
          return result.decode("string_escape")
      result = "".join(_cescape_highbit_to_str[ord(c)] for c in result)
      return (
          result.encode(
              "ascii"
          ).decode(  # Make it bytes to allow decode.
              "unicode_escape"
          )
          # Make it bytes again to return the proper type.
          .encode("raw_unicode_escape")
      )
  
imports: import re
  import six
label_desc: Use image node_id 2 for calling a global function with example usage: CUnescape(text) and returns: result, m, result, unknown