本文转自http://www.cnblogs.com/xuxm2007/archive/2011/01/17/1937220.html

Python中执行系统命令常见方法有两种：


两者均需 import os

(1) os.system

# 仅仅在一个子终端运行系统命令，而不能获取命令执行后的返回信息

system(command) -> exit_status
Execute the command (a string) in a subshell.

# 如果再命令行下执行，结果直接打印出来

1 >>> os.system('ls')
3 11.wmvbooks     downloads   Pictures  python
02 >>>tmp
04 ['dump_db_pickle.py ',
06 'dump_db_shelve.py ',
08 '__init__.py ',
10 'make_db_pickle_recs.py ',
12 'peopleinteract_query.py ',
14 'testargv.py ',
16 'update_db_pickle.py ',
2 >>> subprocess.call (["cmd", "arg1", "arg2"],shell=True)

获取返回和输出:

1 importsubprocess
3 forline inp.stdout.readlines():
5 retval =p.wait()

(4)  使用模块commands模块

1 >>> importcommands
3 ['__all__', '__builtins__', '__doc__', '__file__', '__name__', 'getoutput', 'getstatus','getstatusoutput', 'mk2arg', 'mkarg']
5 'Wed Jun 10 19:39:57 CST 2009'
7 >>> commands.getstatusoutput("date")
查看源代码
打印
1 Traceback (most recent call last):
3 main()
5 fax.sendFax()
7 os.popen(cmd)
8 UnicodeEncodeError: 'ascii'codec can't encode characters inposition 46-52: ordinal not inrange(128)

关于本文更多的延伸阅读地址：
http://zh-cn.how-to.mobi/index.php?id=89228

http://www.javaeye.com/topic/406623