启动调度器出现 TypeError: unsupported type for timedelta minutes component: NoneType

[Richard]

我在服务器部署过程中，进行到启动调度器这步：
python scheduler_booter.py --usage validator

就会出现如下错误：

Traceback (most recent call last):
File "scheduler_booter.py", line 22, in
scheduler_start()
File "/usr/local/lib/python3.5/dist-packages/click/core.py", line 722, in call
return self.main(*args, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.5/dist-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python3.5/dist-packages/click/core.py", line 535, in invoke
return callback(*args, kwargs)
File "/home/tding/haipproxy-0.1-v2/scheduler/scheduler.py", line 187, in scheduler_start
scheduler.schedule_with_delay()
File "/home/tding/haipproxy-0.1-v2/scheduler/scheduler.py", line 66, in schedule_with_delay
schedule.every(internal).minutes.do(self.schedule_task_with_lock, task)
File "/usr/local/lib/python3.5/dist-packages/schedule/init.py", line 393, in do
self._schedule_next_run()
File "/usr/local/lib/python3.5/dist-packages/schedule/init.py", line 428, in _schedule_next_run
self.period = datetime.timedelta({self.unit: interval})
TypeError: unsupported type for timedelta minutes component: NoneType

[resolvewang]

python版本？
是否下载的是release中的？

[Richard]

Python 3.5
Ubuntu 16.04.5 LTS (GNU/Linux 4.11.0-041100-generic x86_64)
release中的版本