fork

跟unix fork 一樣耶

import sys, os
import time

pid = os.fork()
if pid > 0:
       # child
       print "child PID %d" % pid
       for i in range(10):
               time.sleep(1)
               print "-"
       sys.exit(0)
print "parent PID %d" % pid
for j in range(10):
       time.sleep(1)
       print '+'