Is it possible to multiprocess a function that returns something in Python?

Question

In Python I have seen many examples where multiprocessing is called but the target just prints something. I have a scenario where the target returns 2 variables, which I nee

Answer 1

Why nobody uses callback of multiprocessing.Pool?

Example:

from multiprocessing import Pool
from contextlib import contextmanager

from pprint import pprint
from requests import get as get_page

@contextmanager
def _terminating(thing):
    try:
        yield thing
    finally:
        thing.terminate()

def _callback(*args, **kwargs):
    print("CALBACK")
    pprint(args)
    pprint(kwargs)

print("Processing...")
with _terminating(Pool(processes=WORKERS)) as pool:
    results = pool.map_async(get_page, URLS, callback=_callback)

    start_time = time.time()
    results.wait()
    end_time = time.time()
    print("Time for Processing: %ssecs" % (end_time - start_time))

Here, I print both args and kwargs. But you can replace callback by:

def _callback2(responses):
    for r in responses:
        print(r.status_code) # or do whatever with response...