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')
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")
打印
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;">
UnicodeEncodeError: 'ascii' codec can't encode characters in position 46-52: ordinal not inrange(128)
