如何在接口加载完成后立即调用PyQt5中的方法?

我正在Qt5中制作一个仪器接口,它工作正常。唯一的问题是它启动缓慢,因为接口 __init__ 包含用于连接仪器的耗时方法(5-10秒)。目前,几秒钟内没有显示任何内容,然后整个界面显示“成功连接到仪器”消息,该消息已写入其控制台(文本编辑小部件)。

我想要的是 我确信这只是一个移动一条线的问题,但我无法理解。感谢您的帮助。

# ================================================
#      Interface management.
# ================================================

class RENAMEMELATER(Ui_renamemetoo, QObject):

     def __init__(self, parent):
        super(Ui_renamemetoo, self).__init__()
        self.ui = Ui_renamemetoo()
        self.ui.setupUi(parent)

        # Redirect IDE console towards GUI console.
        sys.stdout = EmittingStream()
        sys.stdout.textWritten.connect(self.redirect_console_messages)
        sys.stderr = EmittingStream()
        sys.stderr.textWritten.connect(self.redirect_console_messages)

        # Initialize PC/instrument communication (MOVE SOMEWHERE ELSE?)
        self.T = TaborSE5082("USB0::0x168C::0x5082::0000218391::INSTR") # TIME CONSUMING.



   def redirect_console_messages(self, text):
       """All print() from the program are appended on a textEdit
          instead of the IDE console."""

        self.ui.Console_textEdit.append(text.rstrip("\n"))



    def close_program(self):
        """Call those functions after the user clicked on exit."""

        self.T.CLOSE()
        sys.stdout = sys.__stdout__
        sys.stderr = sys.__stderr__
        print("Program terminated.")

# ================================================
#      Program execution.
# ================================================

if __name__ == "__main__":

    # Define the app.
    if not QtWidgets.QApplication.instance():
        app = QtWidgets.QApplication(sys.argv)
    else:
        app = QtWidgets.QApplication.instance()

    # Start the interface.
    Form = QtWidgets.QWidget()
    prog = RENAMEMELATER(Form)
    Form.show()

    # Handle what happens at program exit.
    app.setQuitOnLastWindowClosed(True)
    app.aboutToQuit.connect(prog.close_program)

    # Launch.
    app.exec()

大体上我可以用 app.aboutToQuit 关闭仪器。也许有某种原因 app.isDoneLoading 我可以 .connect 以同样的方式初始化我的仪器?

非常感谢。