RandomUsefulStuff/sensors.py

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#!/usr/bin/python3
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import os, json, sys
# comments added for Panini
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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
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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
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temps = json.loads(temps_str) # load json string into a python dict
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try:
# this is ... well ... a oneliner I would use...
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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
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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