<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reset(self):
 """ Reset this Layout and the Widgets it contains. """

        # Ensure that the widgets are using the right values.
        self.update_widgets()

        # Reset all the widgets.
        for column in self._columns:
            for widget in column:
                widget.reset()
                widget.blur()

        # Find the focus for the first widget
        self._live_widget = -1
        self._find_next_widget(1)