Python script to get temperature reading from DS18B20 sensor

DS18B20_fetch-temp.py

#!/usr/bin/python

import os
import time

 
if os.path.isdir('/sys/bus/w1/devices/28-011111ffffff/'):
        os.system('/sbin/modprobe w1-gpio')
        os.system('/sbin/modprobe w1-therm')
        temp_sensor = '/sys/bus/w1/devices/28-011111ffffff/w1_slave'
 
	while(True):
        	t = open(temp_sensor, 'r')
        	lines = t.readlines()
        	t.close()
		if not len(lines) == 0:
			temp_output = lines[1].find('t=')
			temp_string = lines[1].strip()[temp_output+2:]
                        temp_f = ((float(temp_string)/1000.0)*1.8+32)
			temp_f = str(round(temp_f,1))
			f = open("/var/www/html/temp.txt", "w")
			f.write(temp_f)
			f.close()
		time.sleep(2)