<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def finish(self, status):
        '''
        Move laggard tasks over

        :param activity: The virtualenv status
        :type  activity: ``str``
        '''
        retox_log.info("Completing %s with status %s" % (self.name, status))
        result = Screen.COLOUR_GREEN if not status else Screen.COLOUR_RED
        self.palette['title'] = (Screen.COLOUR_WHITE, Screen.A_BOLD, result)
        for item in list(self._task_view.options):
            self._task_view.options.remove(item)
            self._completed_view.options.append(item)
        self.refresh()