树莓派获取[cpu温度/cpu使用率/内存空闲率]

python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
显示树莓派cpu温度、使用率及内存使用率
'''

import os

def show_temp():
    file = open("/sys/class/thermal/thermal_zone0/temp")
    temp = float(file.read()) / 1000
    file.close()
    print "Temp: %.1f ℃" %temp


def show_mem():
    mem_cmd = "free -m | grep Mem | awk '{print ($4+$6)/$2}'"
    mem_sur = round(float(os.popen(mem_cmd).read()), 2) * 100
    print "Mem: %d%%" % mem_sur


def show_cpu():
    cpu_cmd = "uptime | awk '{print $8,$9,$10,$11,$12}'"
    cpu_used = os.popen(cpu_cmd).read()
    print "Cpu: %s" % cpu_used.replace('\n', '')


if __name__ == '__main__':

    show_temp()
    show_cpu()
    show_mem()

内存部分好像不准确

这是使用您的程序获得的结果：
Temp: 41.2 ℃
Cpu: average: 0.01, 0.02, 0.00
Mem: 90%

这是参考http://blog.csdn.net/huayucong/article/details/50389910获得的结果（其中有一些拼写的错误，已改正）：
CPU Temperature = 41.2
CPU Use = 0.2

RAM Total = 882.0 MB
RAM Used = 99.0 MB
RAM Free = 783.0 MB

DISK Total Space = 15GB
DISK Used Space = 1.1GB
DISK Used Percentage = 8%

楼上CPU的结果也不对，原文只能获得上次boot时候的CPU，是一个定值

参考http://www.blogjava.net/fjzag/articles/317773.html计算