temp2.py

import os 
import glob
import time
import re
#initialize the device
os.system('sudo modprobe w1-gpio')
os.system('sudo modprobe w1-therm')
base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'
def read_temp_raw():
    f = open(device_file, 'r')
    lines = f.readlines()
    f.close()
    return lines
def read_temp():
    lines = read_temp_raw()
    
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()    
    
    match = re.search(r't=([0-9]*)\n*', lines[1])
    if match != None:
        temp_string = match.group(1)
        
        temp_c = float(temp_string) / 1000.0
        temp_f = temp_c * 9.0 / 5.0 + 32.0
        return temp_c, temp_f


while True:
    print(read_temp())
    # time.sleep(0.1)