玩树莓派时比较关心的就是它的内存够不够用，它的系统资源占用情况怎么样，通过以下Python脚本，我们可以直接读取标题中所列出的相关参数，代码不长，它们依然运行在我的树莓派里面。

建立python脚本文件,文件名就叫做get.py吧：

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sudo nano get.py

贴入以下代码：

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import os
import commands
# Return CPU temperature as a character string                                     
def getCPUtemperature():
    res = os.popen('vcgencmd measure_temp').readline()
    return(res.replace("temp=","").replace("'C\n",""))
 
def get_gpu_temp():
    gpu_temp = commands.getoutput( '/opt/vc/bin/vcgencmd measure_temp').replace( 'temp=', '').replace( '\'C', '')
    return  float(gpu_temp)
# 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('GPU Temperature = '+ str(get_gpu_temp()))
    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))

赋予脚本执行权限

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sudo chmod +x get.py

最后执行脚本，这样就可以显示信息了，前提是装了python客户端。

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python get.py