Python - PyQt5 set Background image

import sys

from PyQt5.QtCore import QSize

from PyQt5.QtGui import QImage, QPalette, QBrush

from PyQt5.QtWidgets import *

class MainWindow(QWidget):

def __init__(self):

QWidget.__init__(self)

self.setGeometry(100,100,300,200)

oImage = QImage("test.jpg")

sImage = oImage.scaled(QSize(300,200)) # resize Image to widgets size

palette = QPalette()

palette.setBrush(10, QBrush(sImage)) # 10 = Windowrole

self.setPalette(palette)

self.show()

if __name__ == "__main__":

app = QApplication(sys.argv)

oMainwindow = MainWindow()

sys.exit(app.exec_())