Writing to a file with multiprocessing

Question

I\'m having the following problem in python.

I need to do some calculations in parallel whose results I need to be written sequentially in a file. So I created a fu

Answer 1

There is a mistake in the write worker code, if the block is false, the worker will never get any data. Should be as follows:

par, res = queue.get(block = True)

You can check it by adding line

 print "QSize",queueOut.qsize()

after the queueOut.put((par,res))

With block=False you would be getting ever increasing length of the queue until it fills up, unlike with block=True where you get always "1".