process_usage.py 文件源码

def fork_case():
    #can't work under windows
    print "Process %s start " %os.getpid()
    pid=os.fork()

    if pid==0:
        print "i am child process %s. and my parent pid is %s " %(os.getpid(),os.getppid())
    else:
        print "i am parent process %s, and create my child process %s" %(os.getpid(),pid)