def __init__(self, parent=None): super(motorCommand, self).__init__(parent) subpanel.__init__(self) self.ui = Ui_motorCommand() self.ui.setupUi(self) self.ui.sendButton.setEnabled(False) self.ui.clearButton.setEnabled(False) # Connect GUI slots and signals self.ui.sendButton.clicked.connect(self.sendCommand) self.ui.clearButton.clicked.connect(self.clearCommand)