How to change Widgets?

Question

Qt

Created in main widget

app = QtGui.QApplication(sys.argv)
main_frame = MainFrame()
main_frame.show()
app.exec_()

in the mainframe widget i create another widget in the mainframe widget method but don't assign the parent - newWidget(parent = None) , i need the old mainframe widget to disappear and in the same window (or the old one closes and the new one appears) the new newwidget newWidget appears .
I tried to send a signal to a new widget through signals so that it * .show (),
I give the old command * .hide (). The result - the window just changes for a second and immediately closes

in class mainFrame
window = WindowTab(parent = None)
self.switch_choose_frm.connect(window.show_frame)
self.switch_choose_frm.emit()

Answer 1

It looks like you're creating the widget statically, so it disappears when the MainFrame() constructor executes. It is necessary so
Signals are not needed here, you just need to call show: window->show();