code: def ask_ok_cancel(message='', default=0, title=''):
      
      return backend_api.opendialog("ask_ok_cancel", dict(message=message, default=default, title=title))
docs: Display a message with choices of OK and Cancel.
  
      returned value:
          OK       -> True
          Cancel   -> False
  
      :ref:`screenshots<ask_ok_cancel>`
  
      :param message: message to be displayed.
      :param title: window title
      :param default: default button as boolean (OK=True, Cancel=False)
      :rtype: bool