python 在linux下能过top,和dh命令获得cpu,内存，以及硬盘信息

浏览数：22 / 时间：2015年06月08日

主要是通过os.popen读取命令输出实现的,os.popen启动新的进程，且将外部命令的输出作为文件类型对象返回。不能获得外部命令的返回值。既然是文件对象就可以直接用for in 来读取，代码如下：

#!/usr/bin/python
#fileName:getinfoinsh.py
#get cpu,meminfo from top command.
 
import 
os
import 
time
 
def 
getinfointop():
    topp=os.popen("top -n1|grep -E ‘^Cpu|^Mem‘")
    toppstr=topp.read()
    replacestr=["\x1b","[m","\x0f","[K"]
    # replace the str cannt be printed.
    for 
item in 
replacestr:toppstr=toppstr.replace(item,‘‘) 
 
    splitstr=toppstr.split("\n")
 
    cpuinfo=splitstr[0].split()
    meminfo=splitstr[1].split()
    info=(cpuinfo[1].strip(‘,‘),cpuinfo[2].strip(‘,‘),cpuinfo[4].strip(‘,‘),meminfo[3],meminfo[5],meminfo[1])
    return 
info
 
 
def 
getinfoindh():
     
    dhplines=[]
    for 
i in 
os.popen("df -h"):
        dhplines.append(i.strip())
    return 
dhplines
         
     
if 
__name__==‘__main__‘:    
    info=getinfointop()
    diskinfo=getinfoindh()
    print 
‘cpu info:‘
    print 
"user cpu used:",info[0]
    print 
"system cpu used:",info[1]
    print 
"free cpu:",info[2]
    print 
‘‘
    print 
‘Mem info:‘
    print 
"used mem:",info[3]
    print 
"free mem:",info[4]
    print 
"total mem:",info[5]
    print 
‘‘
    print 
‘disk info:‘
    for 
i in 
diskinfo:print 
i
    print 
‘‘
    print 
‘time:‘, time.strftime(‘%Y-%m-%d  %H:%M‘,time.localtime(time.time()))