获取树莓派当前状态和数据（温度、CPU、内存、硬盘）

本篇介绍如何使用Python编写一个能输出树莓派各种状态和数据的脚本，包括CPU温度、CPU占用情况、内存占用情况和硬盘占用。

建立脚本：

sudo  nano get.py

贴入如下代码：

import  os

# Return CPU temperature as a character string
def  getCPUtemperature():
    res  = os.popen( 'vcgencmd measure_temp' ).readline()
    return (res.replace( "temp=" ," ").replace(" 'C\n "," "))

# Return RAM information (unit=kb) in a list
# Index 0: total RAM
# Index 1: used RAM
# Index 2: free RAM
def  getRAMinfo():
    p  = os.popen( 'free' )
    i  = 0
    while  1 :
        i  = i  + 1
        line  = p.readline()
        if  i = = 2 :
            return (line.split()[ 1 : 4 ])

# Return % of CPU used by user as a character string
def  getCPUuse():
    return ( str (os.popen( "top -n1 | awk '/Cpu\(s\):/ {print $2}'" ).readline().strip()))

# Return information about disk space as a list (unit included)
# Index 0: total disk space
# Index 1: used disk space
# Index 2: remaining disk space
# Index 3: percentage of disk used
def  getDiskSpace():
    p  = os.popen( "df -h /" )
    i  = 0
    while 1 :
        i  = i  + 1
        line  = p.readline()
        if i = = 2 :
            return (line.split()[ 1 : 5 ])


# CPU informatiom
CPU_temp  = getCPUtemperature()
CPU_usage  = getCPUuse()

# RAM information
# Output is in kb, here I convert it in Mb for readability
RAM_stats  = getRAMinfo()
RAM_total  = round ( int (RAM_stats[ 0 ])  / 1000 , 1 )
RAM_used  = round ( int (RAM_stats[ 1 ])  / 1000 , 1 )
RAM_free  = round ( int (RAM_stats[ 2 ])  / 1000 , 1 )

# Disk information
DISK_stats  = getDiskSpace()
DISK_total  = DISK_stats[ 0 ]
DISK_used  = DISK_stats[ 1 ]
DISK_perc  = DISK_stats[ 3 ]

if __name__  = = '__main__' :
    print ('')
    print ( 'CPU Temperature = ' + CPU_temp)
    print ( 'CPU Use = ' + CPU_usage)
    print ('')
    print ( 'RAM Total = ' + str (RAM_total) + ' MB' )
    print ( 'RAM Used = ' + str (RAM_used) + ' MB' )
    print ( 'RAM Free = ' + str (RAM_free) + ' MB' )
    print ('')
    print ( 'DISK Total Space = ' + str (DISK_total) + 'B' )
    print ( 'DISK Used Space = ' + str (DISK_used) + 'B' )
    print ( 'DISK Used Percentage = ' + str (DISK_perc))

然后执行：

chmod +x get.py
python get.py

预期输出结果如下：

CPU Temperature = 53.0
CPU Use = 13.5

RAM Total = 497.0 MB
RAM Used = 116.0 MB
RAM Free = 381.0 MB

DISK Total Space = 3.6GB
DISK Used Space = 1.8GB
DISK Used Percentage = 53%