Python multiprocessing Simple Example

import multiprocessing as mp
from time import sleep

def log_gsr(g):
    while True:
        sleep(0.5)
        print('gsr...')
        if not g['gsr']:
            break

    return "good"

def log_eyetracking(g):
    while True:
        sleep(2)
        print('eye tracking...')
        if not g['eye']:
            break
    return "good"

def log_analog_input(g):
    while True:
        sleep(1)
        print('analog input...')
        if not g['analog']:
            break
    return "good"

if __name__ == '__main__':
    g = mp.Manager().dict()
    g['ready'] = False
    g['gsr'] = True
    g['eye'] = True
    g['analog'] = True
    gsr = mp.Process(target=log_gsr, args=(g,))
    eyetracking = mp.Process(target=log_eyetracking, args=(g,))
    analog = mp.Process(target=log_analog_input, args=(g,))

    gsr.start()
    eyetracking.start()
    analog.start()

    sleep(5)

    g['gsr'] = False
    g['eye'] = False
    g['analog'] = False
    a = gsr.join()
    b = eyetracking.join()
    c = analog.join()

    print(gsr.value, eyetracking.value, analog.value)