Python执行系统命令的方法

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.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:

1	import subprocess

3	for line in p.stdout.readlines():

5	retval = 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

1	Traceback (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;">

8	UnicodeEncodeError: 'ascii' codec can't encode characters in position 46-52: ordinal not in range(128)