定时任务celery 的 报错解决 ValueError: not enough values to unpack (expected 3, got 0)

当运行例子 result.get() 
出现错误提示: 
ValueError: not enough values to unpack (expected 3, got 0) #4178

解决方式:   python manage.py celery worker --pool=solo -l info

celery -A tasks worker --pool=solo -l info