app.py

#coding: utf-8

import sys
from PySide import QtGui, QtCore
from PySide.QtDeclarative import QDeclarativeView

app = QtGui.QApplication(sys.argv)
view = QDeclarativeView()
url = QtCore.QUrl("view.qml")
view.setSource(url)
view.show()
sys.exit(app.exec_())

view.qml

import QtQuick 1.0

Rectangle {
    width: 1024
    height: 768

    Image {
        source: "images/mtsis_tela_balanca_1024.png"
        fillMode: Image.PreserveAspectFit
    }
}