[PyQt4] MessageBox show

#! /usr/bin/env python

# -*- coding: utf-8 -*-

#

import sys

from PyQt4.QtGui import *

# Create an PyQT4 application object.

a = QApplication(sys.argv)      

# The QWidget widget is the base class of all user interface objects in PyQt4.

w = QWidget()

# Show a message box

result = QMessageBox.question(w, 'Message', "Do you like Python?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No)

if result == QMessageBox.Yes:

    print 'Yes.'

else:

    print 'No.'        

# Show window

w.show()

sys.exit(a.exec_())