import sys
import PySide2

from PySide2 import QtGui, QtWidgets
from PySide2.QtCore import Qt
from PySide2.QtWidgets import *

class App(QWidget):

    def __init__(self, parent=None):

        QWidget.__init__(self,parent)

        grid = QGridLayout(self)
        btnStart = QPushButton("Start")
        btnShtdw = QPushButton("Shutdown")
        btnStdBy = QPushButton("Stand By")
        grid.addWidget( btnStart, 1,1)
        grid.addWidget( btnShtdw, 2,2)
        grid.addWidget( btnStdBy, 3,1)
        self.setLayout(grid)
        self.setFixedSize(400,300)

def location_on_the_screen(self):
    avlGeo = QDesktopWidget().availableGeometry()
    scrGeo = QDesktopWidget().screenGeometry()

    widget = self.geometry()
    x = avlGeo.width() - widget.width()
    y = 4 * avlGeo.height() - scrGeo.height() - widget.height()
    self.move(x,y)

def appClose(self):
    self.close()

def closeEvent(self, ev):
    resp= QMessageBox.question( self, "komunikat",
    "czy aby napewno zakonczyc dzialanie aplikacji?",
    QMessageBox.Yes | QMessageBox.No, QMessageBox.NO )
    if resp == QMessageBox.Yes:
        ev.accept()
    else:
        ev.ignore()

def read():
    plik = "test.txt"
    with open(plik, "r") as reader:
        content = reader.readlines()
        print(content)

if __name__=='__main__':
    app = QApplication(sys.argv)
    win = App()
    win.setWindowTitle('Room PC ctrl')
    win.show()
    sys.exit(app.exec_())