MultiProcess em Python e o drible no GIL (http://www.diego-garcia.info/2016/02/27/multi-process-em-python-e-fuga-do-gil/)

primes_numbers.py

from concurrent.futures import ProcessPoolExecutor, as_completed
import sys


TO_CALCULATE = range(1000, 15000, 1000)


def primes_until(num):
    result = []
    for p in range(2, num+1):
        for i in range(2, p):
            if p % i == 0:
                break
        else:
            result.append(p)
    return result


def run_serial():
    print({i: primes_until(i) for i in TO_CALCULATE})


def run_multiprocess():
    waits = {}
    with ProcessPoolExecutor() as executor:
        waits = {
            executor.submit(primes_until, i) : i
            for i in TO_CALCULATE
        }
        print({
            waits[future]: future.result()
            for future in as_completed(waits)
        })


if __name__ == '__main__':
    """
    To run serial
    $ python primes_numbers.py
    To run multiprocess
    $ python multi_requests.py multiprocess
    """
    if len(sys.argv) > 1 and sys.argv[1] == 'multiprocess':
        run_multiprocess()
    else:
        run_serial()