Temperature Tracker using Raspberry Pi

import os
import glob
import time
import RPi.GPIO as GPIO 


os.system('modprobe w1-gpio')
os.system('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()
    equals_pos = lines[1].find('t=')
    if equals_pos != -1:
        temp_string = lines[1][equals_pos+2:]
        temp_c = float(temp_string) / 1000.0
        temp_f = temp_c * 9.0 / 5.0 + 32.0
        return temp_c, temp_f

ports = [17, 27, 22, 23, 24, 25, 8, 7, 1, 16]

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)

for x in ports:
    GPIO.setup(x, GPIO.OUT)

last = 0

try:
    while True:
        (temp_celsius, _) = read_temp()

        min_temp = int(temp_celsius)
        max_temp = min_temp + 1

        x = 9 - int((max_temp - temp_celsius) * 10)
        print(f'[DEBUG] temperature_celsius={temp_celsius}  units={x} last_unit={last}')

        for i in range(x):
            GPIO.output(ports[i], GPIO.HIGH)
        
        if x < last:
            for i in range(x, last):
                GPIO.output(ports[i], GPIO.LOW)

        last = x
except KeyboardInterrupt:
    for port in ports:
        GPIO.output(port, GPIO.LOW)