<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_timeout(self, timeout):
 """ Set Screen Timeout Duration """


        if timeout > 0:
            self.timeout = timeout
            self.server.request("screen_set %s timeout %i" % (self.ref, (self.timeout * 8)))