import sys from PyQt5.QtWidgets import QApplication from init import Init from user import MainWindow if __name__ == '__main__': app = QApplication(sys.argv) initWindow = Init() mainWindow = MainWindow() initWindow.loginButton.clicked.connect(mainWindow.handle_visible) initWindow.loginButton.clicked.connect(initWindow.hide) initWindow.close_signal.connect(initWindow.close) initWindow.show() sys.exit(app.exec_())