code: def on_menu_exit(self, event):
          
          if self.close_warning:
              TEXT = "Data is not saved to a file yet!\nTo properly save your data:\n1) Analysis --> Save current interpretations to a redo file.\nor\n1) File --> Save MagIC tables.\n\n Press OK to exit without saving."
              dlg1 = wx.MessageDialog(
                  None, caption="Warning:", message=TEXT, style=wx.OK | wx.CANCEL | wx.ICON_EXCLAMATION)
              if self.show_dlg(dlg1) == wx.ID_OK:
                  dlg1.Destroy()
                  self.GUI_log.close()
                  self.Destroy()
                  # if a custom quit event is specified, fire it
                  if self.evt_quit:
                      event = self.evt_quit(self.GetId())
                      self.GetEventHandler().ProcessEvent(event)
                  if self.standalone:
                      sys.exit()
          else:
              self.GUI_log.close()
              self.Destroy()
              # if a custom quit event is specified, fire it
              if self.evt_quit:
                  event = self.evt_quit(self.GetId())
                  self.GetEventHandler().ProcessEvent(event)
              if self.standalone:
                  sys.exit()
docs: Runs whenever Thellier GUI exits