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I have a series of maintenance tasks for a python WSGI application that are a bit too complex for a crontab (jobs need to be run at frequencies derived from the size of the job queue, manage a connection pool to a group of EC2 instances, etc).

How should I implement a long-running, event-driven python program? I've never needed this functionality before, so I'm not even sure what to google.

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    twistedmatrix.com/trac ? Commented Aug 29, 2011 at 23:21
  • @zengr, twisted and python-daemon are the first two things that come to mind, but I wanted to see if I was missing something in the standard library before I commit to anything. I'm still a bit new to python. Commented Aug 29, 2011 at 23:28

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Most of the large, modern python sites are using Celery for this type of work. It is a distributed task queue that supports scheduling of tasks as well.

Though probably a bit heavyweight for a small site, it'll grow with you. I'm looking to implement it myself (sans Rabbit) shortly.

I recently found another choice for django users, django-tasks which is focused on fewer, longer, batch processing type jobs. There is also django-ztask using zeromq.

Addendum: Just came across gearman which has python bindings.

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Ah, apparently the google query I was looking for was "python asynchronous task queue". :)

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