Parse the output of the Ubuntu sensors utility

parse_sensors.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
This script parses the output of the Ubuntu 'sensors' utility.

The output of sensors looks like this on my machine:

    acpitz-virtual-0
    Adapter: Virtual device
    temp1:        +56.0°C  (crit = +107.0°C)

    coretemp-isa-0000
    Adapter: ISA adapter
    Core 0:       +50.0°C  (high = +95.0°C, crit = +105.0°C)
    Core 2:       +50.0°C  (high = +95.0°C, crit = +105.0°C)

Typical output:
    {'core2': (57.0, 95.0, 105.0), 'core1': (56.0, 95.0, 105.0), 'acpi': (52.0, 107.0)}

If you want to adapt this for your own machine you may have
to make some adjustments to the reg exps.

Thanks to the folks on SO for Unicode advice:
http://stackoverflow.com/questions/8952430/
"""

import locale
import re
import subprocess

# Could be more belt and braces by getting this information
# from `which` rather than hard-coding a path.
SENSORS = '/usr/bin/sensors'


def parse():
    temps = {'temp1':None, 'core1':None, 'core2':None}
    temp_re = re.compile(ur'(temp1:)\s+(\+|-)(\d+\.\d+)°C\s+' +
                         ur'\(crit\s+=\s+(\+|-)(\d+\.\d+)°C\).*',
                         flags=re.UNICODE)
    core_re = re.compile(ur'Core (\d):\s+' +
                         ur'(\+|-)(\d+\.\d+)°C\s+' 
                         ur'\(high\s+=\s+(\+|-)(\d+\.\d+)°C, ' +
                         ur'crit\s+=\s+(\+|-)(\d+\.\d+)°C\).*',
                         flags=re.UNICODE)

    # Should really be in a try / except.
    data = subprocess.check_output(SENSORS).decode(locale.getpreferredencoding())
    
    for line in data.split('\n'):
        if line.startswith('temp1'):
            match = re.match(temp_re, line)
            if match:
                temp, crit = float(match.group(3)), float(match.group(5))
                temps['acpi'] = (temp, crit)
        elif line.startswith('Core 0') or line.startswith('Core 2'):
            match = re.match(core_re, line)
            if match:
                temp, high, crit = (float(match.group(3)),
                                    float(match.group(5)),
                                    float(match.group(7)))
                if match.group(1) == '0':
                    temps['core1'] = (temp, high, crit)
                else:
                    temps['core2'] = (temp, high, crit)
    return temps

if __name__ == '__main__':
    print parse()
    # Typical output:
    # {'core2': (57.0, 95.0, 105.0), 'core1': (56.0, 95.0, 105.0), 'acpi': (52.0, 107.0)}