What began as a easy cron substitute was a hands-on lesson in threading, reminiscence, and queues
Press enter or click on to view picture in full measurement
![]()
I assumed cron was boring.
Positive, it runs your scripts. However what if I wished a job scheduler in pure Python — one thing that didn’t simply hearth duties, however may:
- Prioritize jobs
- Handle timeouts
- Deal with concurrency and failure
- Visualize queue state in actual time
I didn’t desire a library. I wished to perceive the way it all labored — from queues to threads to timing.
So I constructed my very own. And it led me deep into the internals of how working methods assume.
The true problem was:
How can I simulate actual OS job administration — in Python?
- A job queue with precedence ranges
- Employee threads that decide duties from the queue
- Retry logic with…
