import sys from PyQt5.QtWidgets import QApplication, QWidget class App(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): self.setWindowTitle('My First Application') self.move(300, 300) self.resize(400, 200) self.show() if __name__ == '__main__': app = QApplication(sys.argv) ex = App() sys.exit(app.exec()) import sys from PyQt5.QtWidgets import QApplication, QWidget..