#!/usr/bin/env python
#coding:utf-8
import psutil
import time
import sys
from optparse import OptionParser
parser = OptionParser() 
parser.add_option("-t", "--time", dest="time",
         help="此参数可查看当前下载占的带宽,-t是测试时间", metavar="10") 
parser.add_option("-d", "--deamon",action="store_false", dest="deamon", default=True, 
         help="后台运行此脚本") 
 
def Sysinfo():
  Boot_Start = time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(psutil.boot_time())) 
  time.sleep(0.5)
  Cpu_usage = psutil.cpu_percent()
  RAM = int(psutil.virtual_memory().total/(1027*1024))
  RAM_percent = psutil.virtual_memory().percent
  Swap = int(psutil.swap_memory().total/(1027*1024))
  Swap_percent = psutil.swap_memory().percent
  Net_sent = psutil.net_io_counters().bytes_sent
  Net_recv = psutil.net_io_counters().bytes_recv
  Net_spkg = psutil.net_io_counters().packets_sent
  Net_rpkg = psutil.net_io_counters().packets_recv
  BFH = r'%'
  print " \033[1;32m开机时间：%s\033[1;m" % Boot_Start
  print " \033[1;32m当前CPU使用率：%s%s\033[1;m" % (Cpu_usage,BFH)
  print " \033[1;32m物理内存：%dM\t使用率：%s%s\033[1;m" % (RAM,RAM_percent,BFH)
  print "\033[1;32mSwap内存：%dM\t使用率：%s%s\033[1;m" % (Swap,Swap_percent,BFH)
  print " \033[1;32m发送：%d Byte\t发送包数：%d个\033[1;m" % (Net_sent,Net_spkg)
  print " \033[1;32m接收：%d Byte\t接收包数：%d个\033[1;m" % (Net_recv,Net_rpkg)
 
  for i in psutil.disk_partitions():
    print " \033[1;32m盘符: %s 挂载点: %s 使用率: %s%s\033[1;m" % (i[0],i[1],psutil.disk_usage(i[1])[3],BFH)
 
def Net_io(s):
  x = 0
  sum = 0
  while True:
    if x >= s:
      break
    r1 = psutil.net_io_counters().bytes_recv
    time.sleep(1)
    r2 = psutil.net_io_counters().bytes_recv
    y = r2 - r1
    print "%.2f Kb/s" % (y / 1024.0)
    sum += y
    x += 1
  result = sum / x
  print "\033[1;32m%s秒内平均速度：%.2f Kb/s \033[1;m" % (x,result / 1024.0)
if __name__ == "__main__":
  (options, args) = parser.parse_args() 
  if options.time:
    Net_io(int(options.time))
  else:
    Sysinfo()

[root@test demo_script]# python get_sysinfo.py 
 开机时间：2015-09-16 15:21:19
 当前CPU使用率：2.0%
 物理内存：3991M 使用率：22.2%
Swap内存：0M  使用率：0.0%
 发送：47886457797 Byte 发送包数：74127845个
 接收：102287702165 Byte    接收包数：952507264个
 盘符: /dev/xvda1 挂载点: / 使用率: 44.2%

[root@test demo_script]# python get_sysinfo.py -t 10
0.08 Kb/s
0.05 Kb/s
0.04 Kb/s
0.04 Kb/s
0.04 Kb/s
0.04 Kb/s
0.04 Kb/s
0.08 Kb/s
0.04 Kb/s
0.04 Kb/s
10秒内平均速度：0.05 Kb/s