code: def focus_widget(self, checked=None, w=None):
          
          if w is None:
              return
          if w.isMinimized():
              w.showNormal()
          else:
              w.show()
          w.activateWindow()
          w.setFocus()
docs: Focus the given widget. Checked is ignored and only used as a slot for QAbstractButton.clicked.
  
          :param checked: The checked state of the button that was clicked
          :type checked: bool
          :param w: the widget to focus
          :type w: QtGui.QWidget
          :returns: None
          :raises: None