python

import os

print('Process (%s) start...' % os.getpid())
# Only works on Unix/Linux/Mac:
pid = os.fork()
#os.fork()创建2个进程,返回值为0时,表示子进程,返回值为子进程号是---父进程os.getpid()表示当前进程 if pid == 0: print('I am child process (%s) and my parent is %s.' % (os.getpid(), os.getppid())) else: print('I (%s) just created a child process (%s).' % (os.getpid(), pid))

  

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