def writeUserHeader(self):
        if self.user is None:
            t1970 = time.gmtime(0)
            expires = time.strftime(
                'Expires=%a, %d-%b-%y %H:%M:%S GMT', t1970)
            self.send_header('Set-Cookie', 'user=;%s' % expires)
        else:
            self.send_header('Set-Cookie', self.user % 'user=%s')
dataset/ETHPy150Open adieu/python-openid/examples/server.py/ServerHandler.writeUserHeader/swapped operands of `%`