python preccecus code example

Example 1: multiprocessing join python

from multiprocessing import Process

def say_hello(name='world'):
    print "Hello, %s" % name

p = Process(target=say_hello)
p.start()
p.join()	# Tells the program to wait until p has finished it's job before exiting

Example 2: how to get the process id from python multiprocess

from multiprocessing import Process
import sys
import time

def say_hello(name='world'):
    print "Hello, %s" % name
    print 'Starting:', p.name, p.pid
    sys.stdout.flush()
    print 'Exiting :', p.name, p.pid
    sys.stdout.flush()
    time.sleep(20)

p = Process(target=say_hello)
p.start()