18B20 Raspberry Pi Python

#The 18B20 sensor is a digital temperature sensor that communicates over a 1-Wire interface. Here's an example code in Python that #reads the temperature from an 18B20 sensor connected to a Raspberry Pi:
#Note: This code assumes that the 18B20 sensor is connected to GPIO4 (pin 7) of the Raspberry Pi. If you're using a different pin, #you'll need to modify the device_folder variable accordingly.

import os
import glob
import time

# initialize the 1-Wire bus
os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

# find the file name of the 18B20 sensor
base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'

def read_temp_raw():
    """Read the raw temperature data from the 18B20 sensor"""
    f = open(device_file, 'r')
    lines = f.readlines()
    f.close()
    return lines

def read_temp():
    """Read the temperature in Celsius from the 18B20 sensor"""
    lines = read_temp_raw()
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()
    equals_pos = lines[1].find('t=')
    if equals_pos != -1:
        temp_string = lines[1][equals_pos+2:]
        temp_c = float(temp_string) / 1000.0
        return temp_c

# read the temperature from the sensor and print it
temp = read_temp()
print('Temperature: {:.1f}°C'.format(temp))