获取树莓派当前状态和数据（温度、CPU、内存、硬盘）

比眉伴天荒 2022-08-18 14:18 268阅读 0赞

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：

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：

<table style=""> 
 <tbody style=""> 
  <tr style=""> 
   <td style=""> 
    <div style="">
      1 
    </div> 
    <div style="">
      2 
    </div> </td> 
   <td style=""> 
    <div style=""> 
     <div style=""> 
      <code style="">chmod</code> 
      <code style="">+x get.py</code> 
     </div> 
     <div style=""> 
      <code style="">python get.py</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

预期输出结果如下：

<table style=""> 
 <tbody style=""> 
  <tr style=""> 
   <td style=""> 
    <div style="">
      1 
    </div> 
    <div style="">
      2 
    </div> 
    <div style="">
      3 
    </div> 
    <div style="">
      4 
    </div> 
    <div style="">
      5 
    </div> 
    <div style="">
      6 
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    <div style="">
      7 
    </div> 
    <div style="">
      8 
    </div> 
    <div style="">
      9 
    </div> 
    <div style="">
      10 
    </div> </td> 
   <td style=""> 
    <div style=""> 
     <div style=""> 
      <code style="">CPU Temperature = 53.0</code> 
     </div> 
     <div style=""> 
      <code style="">CPU Use = 13.5</code> 
     </div> 
     <div style="">
       &nbsp; 
     </div> 
     <div style=""> 
      <code style="">RAM Total = 497.0 MB</code> 
     </div> 
     <div style=""> 
      <code style="">RAM Used = 116.0 MB</code> 
     </div> 
     <div style=""> 
      <code style="">RAM Free = 381.0 MB</code> 
     </div> 
     <div style="">
       &nbsp; 
     </div> 
     <div style=""> 
      <code style="">DISK Total Space = 3.6GB</code> 
     </div> 
     <div style=""> 
      <code style="">DISK Used Space = 1.8GB</code> 
     </div> 
     <div style=""> 
      <code style="">DISK Used Percentage = 53%</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>