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    <p>I had done some similar task in the past with Machine Learning and Data Mining. Using <code>multiprocessing</code> in your case may not be that difficult of a task. It depends on how tolerant you are keen on making the program, you can use a <em>Threaded Pool</em> pattern. My personal favourite is <em>Producer - Consumer</em> pattern using <code>Queue</code>, this design can handle a variety of complex task. Here is a sample toy program using <code>multiprocessing</code>:</p> <pre><code>import multiprocessing from multiprocessing import Queue, Process from Queue import Empty as QueueEmpty # Assuming this text is very very very very large text="Here I am writing some nonsense\nBut people will read\n..." def read(q): """Read the text and put in a queue""" for line in text.split("\n"): q.put(line) def work(qi, qo): """Put the line into the queue out""" while True: try: data = qi.get(timeout = 1) # Timeout after 1 second qo.put(data) except QueueEmpty: return # Exit when all work is done except: raise # Raise all other errors def join(q): """Join all the output queue and write to a text file""" f = open("file.txt", w) while True: try: f.write(q.get(timeout=1)) except QueueEmpty: f.close() return except: raise def main(): # Input queue qi = Queue() # Output queue qo = Queue() # Start the producer Process(target = read, args = (qi, )).start() # Start 8 consumers for i in range(8): Process(target = work, args = (qi, qo, )).start() # Final process to handle the queue out Process(target = join, args = (qo, )).start() </code></pre> <p>Type this from memory so if there is any error, please correct. :)</p>
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    1. COThanks, this helps. Do you know if this will play nicely when executing external commands using `subprocess.call`, such that each item in the queue would need to execute an external command, e.g. `program_name.exe -arguments`
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    2. COI have yet to try combining `subprocess` and `multiprocessing`; however, I do not think it would be a problem as long as you handle the communication in `subprocess` correctly. I have seen implementation using both in [this question](http://stackoverflow.com/questions/884650/how-to-spawn-parallel-child-processes-on-a-multi-processor-system). It seems like what you are looking for.
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    3. COThanks, that helps a lot! I think between your post and that one, I should be all set :)
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