python 调用系统命令的两种方法-优快云博客

本文介绍了在Python中执行系统命令的几种常见方法，包括使用os模块的system函数、subprocess模块的call方法以及commands模块的相关函数。这些方法适用于不同的应用场景，并提供了如何获取命令执行结果的示例。

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:

      1importsubprocess

      3forline inp.stdout.readlines():

      5retval =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
      
      1Traceback (most recent call last):

      3main()

      5fax.sendFax()

      7os.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-p_w_picpath: 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 inposition 46-52: ordinal not inrange(128)