from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QApplication, QMainWindow

class FSRImageVideoUpscaler:
    def __init__(self):
        self.app = QApplication(sys.argv)
        self.window = QMainWindow()
        self.label = QtWidgets.QLabel(self.window)

    def runapp(self):
        self.window.setGeometry(200, 200, 800, 600)
        self.window.setWindowTitle("FSR Image & Video upscaler")

        self.label.setText("Hello World")
        self.label.move(300, 300)


        self.window.show()
        sys.exit(self.app.exec_())

FSRImageVideoUpscaler().runapp()