Multicore Python using concurrent.interpreters

script.py

from concurrent import interpreters

interps = [
    interpreters.create(),
    interpreters.create(),
    interpreters.create(),
]


def fib(n):
    a, b = 0, 1
    for _ in range(n):
        a, b = b, a + b


def submain():
    interp = interpreters.get_current()
    ident = interp.id
    print(f'Starting interpreter: {ident}')
    fib(ident * 999999)


def main():
    threads = []
    for interp in interps:
        t = interp.call_in_thread(submain)
        threads.append(t)

    print('All spawned')
    for t in threads:
        t.join()
        print(f'{t.name} Joined')
    print('All joined')

    for interp in interps:
        interp.close()


if __name__ == '__main__':
    main()