Python: Update Local Variable in a Parallel Process from Parent Program

Question

I am relatively new to programming, and what I am asking might be a task that is not possible. What I want to do is start a parallel process, which will continuously run until

Answer 1

You can use a queue to pass data between the processes:

from multiprocessing import Process, Queue
from loop import loop

i = 1
q = Queue()
q.put(i)
p = Process(target=loop, args=(q, ))
p.start()

Whenever you want to transmit a new value of i to the other process, just put it in the queue.

Change your loop.py module accordingly:

def loop(q):
  while True:
    i = q.get()
    print i

In your main code, you can put new values for the process:

while True:
  i+=1
  q.put(i)
  time.sleep(1)