import sys from PySide6.QtWidgets import QApplication, QMainWindow from window import Ui_MainWindow class MainWindow(QMainWindow, Ui_MainWindow): def __init__(self, parent=None): super().__init__(parent) self.setupUi(self) self.buttonSend.clicked.connect(self.changeLabelResult) # type: ignore def changeLabelResult(self): text = self.lineName.text() self.labelResult.setText(text) if __name__ == '__main__': app = QApplication(sys.argv) mainWindow = MainWindow() mainWindow.show() app.exec()