led.py

class updateDriverThread(threading.Thread):
... cut

    def run(self):
        while not self.stopped():
            try:
                self._wait.wait()
                self._updating.clear()
                self._driver._update(self._data)
                self._data = []
                self._wait.clear()
                self._reading.set()
                self._updating.set()
            except Exception, e:
                print e