[Python Study Notes]计算cpu使用率

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>>文件: cpu使用率.py
>>作者: liu yang
>>邮箱: liuyang0001@outlook.com

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#!/usr/bin/env python
# -*- coding: utf-8 -*-

import psutil
from time import sleep

def cpu_utilization():

    cpu_start_alltime=psutil.cpu_times()
    '''print(cpu_start_alltime)得到的内容:scputimes(user=14088.359375, system=20540.59375, 
                            idle=362071.6875, interrupt=847.9375019073486, dpc=3795.6875)'''
    t1all=sum(cpu_start_alltime)#开始的cpu时间总和


    sleep(1)#休眠一秒

    cpu_end_alltime=psutil.cpu_times()
    t2all=sum(cpu_end_alltime)#结束时的cpu时间总和

    t1busy=t1all-cpu_start_alltime.idle#开始的忙碌时间=总时间-空闲时间
    t2busy=t2all-cpu_end_alltime.idle

    '''cpu使用率:(结束的忙碌时间-开始的忙碌时间)/(结束的总时间-开始的总时间)'''
    cpu_busy=(t2busy-t1busy)/(t2all-t1all)*100
    # print("cpu使用率:%0.2f"%cpu_busy+'%')
    return  cpu_busy

if __name__ == '__main__':
    cpu_used=cpu_utilization()
    print("cpu使用率:%0.2f"%cpu_used+'%')#将得到的使用率一两位小数格式显示