def start():
    app = QApplication(sys.argv)
    app.setApplicationName('My Little ERP')
    mainWindow = MainWindow(app)
    mainWindow.show()
    sys.exit(app.exec_())
def start():
    app = QApplication(sys.argv)
    app.setApplicationName('My Little ERP')
    mainWindow = MainWindow(app)
    mainWindow.show()
    sys.exit(app.exec_())