monitoring the temperature of the CPU with Python

[snippsat]

You stop using Python 2(dead💀),that you use Raspberry Pi is no excuse as most of there stuff is updated.
So in Python 3.9,see that Unicode can now be used in string one biggest update moving from 2 to 3.

>>> temp = 24.5
>>> print(f"temperature {temp}°C)")
temperature 24.5°C)

import re, subprocess

def check_CPU_temp():
    temp = None
    err, msg = subprocess.getstatusoutput('vcgencmd measure_temp')
    if not err:
        m = re.search(r'-?\d\.?\d*', msg)   # a solution with a  regex
        try:
            temp = float(m.group())
        except ValueError: # catch only error needed
            pass
    return temp, msg

temp, msg = check_CPU_temp()
print(f"temperature {temp}°C")
print(f"full message {msg}")