24kr1u.py

import os
import sys
from PySide import QtGui, QtCore


class MainWindow(QtGui.QMainWindow):

    def __init__(self):
        super(MainWindow, self).__init__()
        self.showFullScreen()
        self.setWindowTitle('TimeBot')
        self.quit_widget = QuitBtn(self)
        self.setCentralWidget(self.quit_widget)


class QuitBtn(QtGui.QWidget):

    def __init__(self, parent):
        super(QuitBtn, self).__init__(parent)
        self.layout = QtGui.QVBoxLayout(self)
        self.btn = QtGui.QPushButton('Quit', self)
        self.btn.clicked.connect(QtCore.QCoreApplication.quit)
        self.layout.addWidget(self.btn)


def main():
    app = QtGui.QApplication(sys.argv)
    window=MainWindow()
    app.exec_()

if __name__ == '__main__':
    main()