RandomUsefulStuff/sensors.py

#!/usr/bin/python3
import os, json, sys

# comments added for Panini

try:
    # get arguments from command line
    sensor_group = sys.argv[1] # 1st argument
    sensor = sys.argv[2] # 2nd arggument
except IndexError: # could not get arguments bc the arguments array doesn't contain enough elements
    print("usage: python3 "+sys.argv[0]+" <sensor group> <sensor>") # show usage information, sys.argv[0] is the name of the python file itself
    sys.exit(1) #exit with error code 1 bc we want scripts to be able to reliably tell that soemthing went wrong

sensors_process = os.popen("sensors -j") # run 'sensors -j' to get a json formatted list of hardware sensors and their values
temps_str = sensors_process.read() # read output of 'sensors -j'
sensors_process.close() # close handle bc we don't need or want to have it around anymore

temps = json.loads(temps_str) # load json string into a python dict

try:
    # this is ... well ... a oneliner I would use...
    print([value for key, value in temps[sensor_group][sensor].items() if key.endswith("input")][0])
    # temps is a dict with multiple dicts inside it
    # first step is to get the desired sensor group
    #   temps[sensor_group]
    # then we get the desired sensor from that sensor group
    #   temps[sensor_group][sensor]
    # from that, we go through all the items of that dict putting the keys and their corresponding values in two variables
    #   for key, value in temps[sensor_group][sensor].items()
    # check whether the key ends with "input"
    #   if key.endswith("input")
    # and if it does, we put it in an array
    #   [value for key, value in temps[sensor_group][sensor].items() if key.endswith("input")]
    # we take the first entry of that array
    #   [value for key, value in temps[sensor_group][sensor].items() if key.endswith("input")][0]
    # and put it on the console
    #   print([value for key, value in temps[sensor_group][sensor].items() if key.endswith("input")][0])

except KeyError: # if we can't find an element in the dict that corresponds to the sensor group / sensor given on the command line
    print("Sensor \""+sensor_group+":"+sensor+" not found!")
    sys.exit(1) #exit with error code 1 bc we want scripts to be able to reliably tell that soemthing went wrong