refactor: make relay a class

relay.py

@@ -3,27 +3,29 @@ import RPi.GPIO as GPIO
 from pathlib import Path 
 import time 
 
-# Config those variables
-PIN = 12
+class Relay:
+    def __init__(self, pin):
+        self.pin = pin
 
-def setup():
-    GPIO.setmode(GPIO.BOARD)
-    GPIO.setup(PIN, GPIO.OUT, initial=GPIO.HIGH)
+    def setup(self):
+        GPIO.setmode(GPIO.BOARD)
+        GPIO.setup(self.pin, GPIO.OUT, initial=GPIO.HIGH)
 
-def turnOn():
-    GPIO.output(PIN, GPIO.LOW)
+    def turn_on(self):
+        GPIO.output(self.pin, GPIO.LOW)
 
-def turnOff():
-    GPIO.output(PIN, GPIO.HIGH)
+    def turn_off(self):
+        GPIO.output(self.pin, GPIO.HIGH)
 
-def tearDown():
-    GPIO.cleanup(PIN)
+    def teardown(self):
+        GPIO.cleanup(self.pin)
 
 if __name__ == '__main__':
-    setup()
-    turnOn()
+    relay = Relay(12)
+    relay.setup()
+    relay.turn_on()
     time.sleep(5)
-    turnOff()
+    relay.turn_off()
     time.sleep(5)
-    tearDown()
+    relay.teardown()