Python MultiProcessing.Pool: How to use with no iterable?

Question

multi-threaded processes

    p = ThreadPool(processes=10)  # creates a pool of 10 workers
    p.map(function_to_call, iterable)  # calls FUNCTION_TO_CALL with the first item from iterable as parameter
    p.close()  # closes the multi-threaded processes one all threads done

I've been trying to use this model, but what if I want to thread a function which has no parameters. Like run() . What would I put for the 'iterable' space, I've been looking all around and can't find a solution.

Answer 1

The Pool.apply function is what you are looking for. Use Pool.apply_async if you want a non blocking call.

p = ThreadPool(processes=10)
p.apply(function_to_call)
p.close()