update-warning.py

import sys

from PyQt4 import QtGui
from PyQt4.QtGui import QMessageBox

application = QtGui.QApplication(sys.argv)

QMessageBox.warning(None, 'Security check recommended',
        'The workstation has been running continuously for a long time. '
        'We recommend that you launch or restart the SecureDrop app to '
        'check for security updates.',
                        QMessageBox.Ok,
                        QMessageBox.Ok)