def start(self):
        "Start cron runner"
        self.add_jobs()
        try:
            while not self._stopped:
                if len(self.pool) < self.poolsize:
                    while len(self.queue) > 0 and self.poolsize < len(self.pool):
                        cron = self.queue.pop()
                        self.pool.append(cron)
                        if 'hardtree_%s_last' % (cron.database) in cache:
                            last_accessed = cache.get(
                                'hardtree_%s_last' % (cron.database))
                            if last_accessed > (time.time() - int(self.qualify_high)):
                                cron.priority = self.priority_high
                                cronlogger.debug(
                                    'HIGH PRIORITY set to ' + unicode(cron))
                        cron.start()
                if len(self.queue) == 0:
                    cronlogger.info(
                        'Cron cycle ' + unicode(self.cycle) + ' completed.')
                    self.cycle += 1
                    if self.noloop:
                        self._stopped = True
                    else:
                        self.add_jobs()
                        time.sleep(self.sleeptime)
                cronlogger.debug("POOL SIZE: " + unicode(len(self.pool)))
                for cron in self.pool:
                    cronlogger.debug("POOL JOB: " + unicode(cron) + ', PRIORITY ' +
                                     unicode(cron.priority) + ', ACTIVE: ' + unicode(cron.is_alive()))
                    if not cron.is_alive():
                        self.pool.remove(cron)
                        continue
                    if cron.priority == self.softkill:
                        cron.terminate()
                    elif cron.priority <= self.hardkill:
                        cron.terminate()
                    cron.priority -= 1
                time.sleep(self.sleeptime)
        except KeyboardInterrupt:
            self.stop()
dataset/ETHPy150Open treeio/treeio/treeio/core/management/commands/runcron.py/CronRunner.start/swapped operands of `<`