如何将os.system的输出分配给变量

Question

我想从python运行此命令

/opt/vc/bin/vcgencmd measure_temp

当我在python中运行它时,它将温度打印到屏幕并返回0.当我尝试将其分配给变量时,它也分配0.

>>> import os
>>> os.system('/opt/vc/bin/vcgencmd measure_temp')
temp=42.8'C
0
>>> temp=os.system('/opt/vc/bin/vcgencmd measure_temp')
temp=42.8'C
>>> temp
0
>>>

如何在python中运行此命令并将实际温度分配给变量？

Answer 1

os.system不返回输出,subprocess.check_output用于此.