Python执行系统命令的方法

http://www.linux-field.com/?p=15

 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')

311.wmv            books     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:

1import subprocess

3for line in p.stdout.readlines():

5retval = p.wait()

(4)  使用模块commands模块

1>>> import commands

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1Traceback (most recent call last):

3    main()

5    fax.sendFax()

7    os.popen(cmd)

<div alt2"="" style="margin: 0px !important; padding: 0px !important; border: 0px !important; outline: 0px !important; font-size: 1em !important; vertical-align: baseline !important; background-image: none !important; background-color: rgb(248, 248, 248) !important; float: none !important; position: static !important; left: auto !important; top: auto !important; right: auto !important; bottom: auto !important; height: auto !important; width: auto !important; line-height: 1.1em !important; direction: ltr !important;">8UnicodeEncodeError: 'ascii' codec can't encode characters in position 46-52: ordinal not inrange(128)

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