用python执行Linux命令

例1：在python中包装ls命令

 
   # 
   !/usr/bin/env python 
   
# 
   python wapper for the ls command 
   
 
   import subprocess 
   
subprocess.call([ 
   " 
   ls 
   ", 
   " 
   -l 
   "]) 
  

在Linux中执行该命令

    [root@pydb python] 
   # 
    python ls.py 
   
total 8 
   
-rwxrwxrwx 1 root root 415 Mar 18 11:40 a.py 
   
-rw-r--r-- 1 root root 103 May 4      22:17 ls.py 
  

下面扩展一下

    [root@pydb python] 
   # 
    python ls.py 
   
# 
   !/usr/bin/env python 
   
# 
   python wapper for the ls command 
   
 
   import subprocess 
   
subprocess.call([ 
   " 
   cat 
   ", 
   " 
   /python/ls.py 
   "]) 
   
以上是执行Linux下的命令和参数。非常不错的一个例子，好好记住吧 
  

下面一个例子是打印系统信息和磁盘信息的：

 
   # 
   !/usr/bin/env python 
   
# 
   A System Information Gathering Script 
   
 
   import subprocess 
   
 
   # 
   command 1 
   
uname =  
   " 
   uname 
   " 
   
uname_arg =  
   " 
   -a 
   " 
   
 
   print  
   " 
   Gathering system information with %s command:\n 
   " % uname 
   
subprocess.call([uname,uname_arg]) 
   
 
   # 
   command 2 
   
diskspace =  
   " 
   df 
   " 
   
diskspace_arg =  
   " 
   -h 
   " 
   
 
   print  
   " 
   Gathering diskspace information %s command:\n 
   " % diskspace 
   
subprocess.call([diskspace,diskspace_arg]) 
  

下面是我本地执行打印的数据

    [root@pydb python] 
   # 
    python info.py 
   
Gathering system information with uname command: 
   
Linux pydb 2.6.18-308.el5  
   # 
   1 SMP Tue Feb 21 20:05:41 EST 2012 i686 i686 i386 GNU /Linux 
   
Gathering diskspace information df command: 
   
Filesystem Size Used Avail Use% Mounted on 
   
/dev/mapper/VolGroup00-LogVol00 
   
                       37G 3.9G 31G 11% / 
   
/dev/sda1 99M 13M 82M 13% /boot 
   
tmpfs 506M 0 506M 0% /dev/shm 
   
[root@pydb python] 
   #