from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import multiprocessing
import queue


running = multiprocessing.Value('i', 1)
request = multiprocessing.JoinableQueue()
response = multiprocessing.Queue(1)

work=[]

def worker(request, response):
    #try:
    param = request.get(timeout=0.1)
    if param.empty()
    # Imagine heavy computation here.
    #except queue.Empty:
    # To check running flag.
    response.put("work_done")
    else:
        result = param ** 2
        response.put(result)


def main():
    for n in range(10):
        work.append(n)
    process = multiprocessing.Process(target=worker, args=(request, response))
    process.start()
    for i in work:
        print("Queueing {}".format(i))
        request.put(i)
    result = response.get()
    #if result != "work_done":
    while result != "work_done":
        print('Result', result)
    process.join()


if __name__ == '__main__':
  main()