dbader/schedule — pull request #26 by grampajoe (2014-06-29 03:12:50+00:00)
Title: Add support for random intervals

For tasks that should run at an irregular interval, this adds the following syntax:
```python
schedule.every(10).to(20).hours.do(job)
```
The scheduler picks a random value in that range as the actual interval used when scheduling the next run.