Read temp value from DS1820 temp sensor connected to raspberry pi

temp.py

#!/usr/bin/python3

from pathlib import Path
import sys

devicepath = "/sys/bus/w1/devices/"
devicerawtempfile = "w1_slave"

with Path(devicepath, sys.argv[1], devicerawtempfile).open() as rawtemp:
  _, templine = rawtemp.readlines()
  _, tempinc = templine.rstrip().split("=")
  print(int(tempinc) / 1000)