Display GUI messages on Ubuntu

sudo apt-get install python-qt4

#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class UI(QMainWindow):
    def __init__(self):
        super(UI, self).__init__()
        self.initUI()

    def initUI(self):

        # Warning Message box
        QMessageBox.warning(self, "Message", u"something wrong")

        self.show()


def main():
    app = QApplication(sys.argv)
    ui = UI()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

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