我從菜單欄項啟動 GtkAboutDialog。這是切換對話框的函數：def open_about(self, *args):        x = about.run()        if x == -4:            # When pressing close;            about.destroy()如果我單擊有關項目的菜單欄一次，就沒有問題，對話框將打開，我可以按照您的預期將其關閉。但如果我再次單擊，則會出現一個空窗口。只能使用一次。(translate.py:31837): Gtk-CRITICAL **: 19:44:24.373: gtk_widget_show: assertion 'GTK_IS_WIDGET (widget)' failed(translate.py:31837): Gtk-CRITICAL **: 19:44:24.373: gtk_label_set_markup: assertion 'GTK_IS_LABEL (label)' failed(translate.py:31837): Gtk-CRITICAL **: 19:44:24.376: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed