def yaml(self):
        return yaml.dump(self.serialized, default_flow_style=False,
                         encoding=None)
def wait_time_gen():
        count = 0
        while True:
            rand = random.randrange(round(interval.total_seconds()))
            tmp = round(start + interval.total_seconds() * count + rand - loop.time())
            yield tmp
            count += 1