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：
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sudo
nano get.py
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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：
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chmod
+x get.py
python get.py
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预期输出结果如下：
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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%
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