code: def CUnescape(text):
    
  
    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')  # Make it bytes to allow decode.
            .decode('unicode_escape')
            # Make it bytes again to return the proper type.
            .encode('raw_unicode_escape'))
docs: Unescape a text string with C-style escape sequences to UTF-8 bytes.