PYTHON

multi threading in python for 2 different functions with return

from queue import Queue
from threading import Thread
import time

def f1(q, x):
    # Sleep function added to compare execution times.
    time.sleep(5)
    # Instead of returning the result we put it in shared queue.
    q.put(x * 2)

def f2(q, x):
    time.sleep(5)
    q.put(x ^ 2)

if __name__ == '__main__':
    x1 = 10
    x2 = 20
    result_queue = Queue()

    # We create two threads and pass shared queue to both of them.
    t1 = Thread(target=f1, args=(result_queue, x1))
    t2 = Thread(target=f2, args=(result_queue, x2))

    # Starting threads...
    print("Start: %s" % time.ctime())
    t1.start()
    t2.start()

    # Waiting for threads to finish execution...
    t1.join()
    t2.join()
    print("End:   %s" % time.ctime())

    # After threads are done, we can read results from the queue.
    while not result_queue.empty():
        result = result_queue.get()
        print(result)