Method error

Lib/re/_parser.py:299–302

(self, msg, offset=0)

        self.__next()

    def error(self, msg, offset=0):
        if not self.istext:
            msg = msg.encode('ascii', 'backslashreplace').decode('ascii')
        return error(msg, self.string, self.tell() - offset)

    def checkgroupname(self, name, offset):
        if not (self.istext or name.isascii()):