#! /usr/bin/python #Datei: mainwindows.py import sys from PyQt6.QtCore import QSize, Qt from PyQt6.QtWidgets import QApplication, QMainWindow, QPushButton # Subclass QMainWindow to customize your application's main window class MainWindow(QMainWindow): def __init__(self): super().__init__() self.setWindowTitle("My App") button = QPushButton("Bitte klicken") # Set the central widget of the Window. self.setCentralWidget(button) app = QApplication(sys.argv) window = MainWindow() window.show() app.exec()