Running a task (a python function) once in future

Hi,

I am looking for a feature by which I can schedule a task to be run in a future time. But only once. Is this functionality available in the `schedule` library?

I have found some way to address the use case by using [threading](https://stackoverflow.com/a/3433565/5785058) lib and [sched](https://docs.python.org/3/library/sched.html#sched.scheduler.enter) but I found using `schedule` lib more intuitive and hence searching for the feature in this lib first.