How to handle concurrent variable writes with Python workerpool

Is there a special way to use Python's workerpool to write to a variable that is outside a particular job.

Let's say, for example, you have a job called DownloadJob which downloads some file and increments a counter. What is the best way to handle the incrementing of this counter variable? Do I need to somehow lock the counter before writing to it or is this something that Python does automatically?

Thanks!

Solution

You can use threading.Lock for mutual exclusion. The documentation is pretty clear about them: http://docs.python.org/library/threading.html#lock-objects

Cheers!