def invalid_block_tag(self, token, command, parse_until=None):
        if parse_until:
            raise self.error(token, "Invalid block tag: '%s', expected %s" % (command, get_text_list(["'%s'" % p for p in parse_until])))
        raise self.error(token, "Invalid block tag: '%s'" % command)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.3/django/template/base.py/Parser.invalid_block_tag/original