Part of a current project at work involves writing many stand-alone processes to handle events from RabbitMQ. The worker processes are managed by Supervisor but should gracefully handle SIGTERM and generally follow a common pattern.

The main design is splitting out how worker's should run from what they are supposed to be doing. Extending the BaseWorker class will give a main classmethod used to start new workers.

The BaseWorker class is split from the WorkerRunner class giving a common interface for all workers and Unixy interaction.

You can take a look at what I have so far on the projects page.