class ThreadWrapper():
    def __init__(self):
        self.stopEvent = threading.Event()
        self.wrapper = Wrapper()
        self.sc = SensorControl()
        self.thrd = threading.Thread(target=self.writer)
    def reader(self):
        return self.wrapper.ss
    def writer(self):
        while not self.stopEvent.is_set():
            self.wrapper.ss = self.sc.getDistances()
            #print self.wrapper.sc
    def start(self):   
        self.thrd.start()
    def stop(self):
        self.stopEvent.set()
        self.thrd.join()
 def __init__(self):
     self.stopEvent = threading.Event()
     self.wrapper = Wrapper()
     self.sc = SensorControl()
     self.thrd = threading.Thread(target=self.writer)