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]#