用python執行Linux命令

例1：在python中包裝ls命令

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

在Linux中執行該命令

            [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 
          

下面擴展一下

            [root@pydb python] 
           # 
            python ls.py 
           
# 
           !/usr/bin/env python 
           
# 
           python wapper for the ls command 
           
 
           import subprocess 
           
subprocess.call([ 
           " 
           cat 
           ", 
           " 
           /python/ls.py 
           "]) 
           
以上是執行Linux下的命令和參數。非常不錯的一個例子，好好記住吧 
          

下面一個例子是打印系統信息和磁盤信息的：

 
           # 
           !/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]) 
          

下面是我本地執行打印的數據

            [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] 
           #