On Aug 12, 4:18 pm, "守株待兔" <1248283...@qq.com> wrote: > in the book ,A call to wait() suspends execution (i.e., waits) until a child > process (any child process) has completed, terminating either normally or via > a signal. wait() will then reap the child, releasing any resources. If the > child has already completed, then wait() just performs the reaping procedure. > here is my code > import os > print "i am parent ",os.getpid() > ret = os.fork() > print "i am here",os.getpid() > if ret == 0: > os.system('ls') > else: > os.wait() > print "i am runing,who am i? ",os.getpid() > > according to the word,the output may be: > i am parent 8014 > i am here 8014 > i am here 8015 > "omitted my file" > i am runing,who am i? 8014 > because 8015 is terminated by os.wait(). > > in fact the output is: > > i am parent 8014 > i am here 8014 > i am here 8015 > "omitted my file" > i am runing,who am i? 8015 > i am runing,who am i? 8014 > > i want to know why ??
To get what you want, use os.exec() instead of os.system() or add a os.exit() just after os.system() Regards -- http://mail.python.org/mailman/listinfo/python-list