import sys from PyQt6.QtCore import pyqtSlot from PyQt6.QtWidgets import QApplication, QMainWindow from test2 import Ui_MainWindow class Adv(QMainWindow, Ui_MainWindow): def __init__(self, parent=None): super(Adv, self).__init__(parent) self.setupUi(self) @pyqtSlot(bool) def on_b_test_clicked(self,a): print('on_b_test',a) if __name__ == '__main__': app = QApplication(sys.argv) app.setDesktopFileName('TestTest') MainWindow = Adv() MainWindow.show() app.exec()