import os, json, sys

try:
    sensor_group = sys.argv[1]
    sensor = sys.argv[2]
except IndexError:
    print("usage: python3 "+sys.argv[0]+" <sensor group> <sensor>")
    sys.exit(1)

sensors_process = os.popen("sensors -j")
temps_str = sensors_process.read()
sensors_process.close()

temps = json.loads(temps_str)

try:
    print([value for key, value in temps[sensor_group][sensor].items() if key.endswith("input")][0])
except KeyError:
    print("Sensor \""+sensor_group+":"+sensor+" not found!")
    sys.exit(1)