Raspberry Pi - GPIO - Binary counter with LED and buttons

binary-counter.py

import RPi.GPIO as GPIO
from math import pow

# Definitions #
BINARY 		= 0b0
LED_PINS 	= [ 18, 23, 24, 25,  12, 16, 20, 21,  4, 17, 27, 22 ]	  # Change this to your LED PIN numbers. Left to right.
LED_PINS_LEN	= len(LED_PINS)
INCREASE_PIN 	= 19    # Change this to your increase button PIN
DECREASE_PIN 	= 26    # Change this to your decrease button PIN
# --- #

# GPIO PIN mode setting #
GPIO.setmode(GPIO.BCM)
# --- #

# GPIO PIN setting #
for pin in LED_PINS:
	GPIO.setup(pin, GPIO.OUT)
	GPIO.output(pin, GPIO.LOW)	# Reset all LED signals
GPIO.setup(INCREASE_PIN, GPIO.IN)
GPIO.setup(DECREASE_PIN, GPIO.IN)
# --- #

# Functions #
def processBinary():
	return [int(i) for i in str("{0:0" + str(LED_PINS_LEN) + "b}").format(BINARY)]
# --- #

# Program block #
inc_input_value = 0
dec_input_value = 0

try:
	while(True):
		inc_input_temp = GPIO.input(INCREASE_PIN)
		dec_input_temp = GPIO.input(DECREASE_PIN)

		if(inc_input_value != inc_input_temp or dec_input_value != dec_input_temp):
			binary_changed = False
			
			if(inc_input_value != inc_input_temp):
				if(inc_input_temp == 1):
					inc_input_value = inc_input_temp
					if(BINARY < int(pow(2, LED_PINS_LEN)) - 1):
						BINARY += 1
						binary_changed = True
						print("Increased. BINARY = " + str(bin(BINARY)) + " (dec : " + str(int(BINARY)) + ", hex : " + str(hex(BINARY)) + ")")
				elif(inc_input_temp == 0):
					inc_input_value = 0
			
			if(dec_input_value != dec_input_temp):
				if(dec_input_temp == 1):
					dec_input_value = dec_input_temp
					if(BINARY > 0):
						BINARY -= 1
						binary_changed = True
						print("Decreased. BINARY = " + str(bin(BINARY)) + " (dec : " + str(int(BINARY)) + ", hex : " + str(hex(BINARY)) + ")")
				elif(dec_input_temp == 0):
					dec_input_value = 0
			
			if(binary_changed):
				binary = processBinary()
				count = 0
				for pin in LED_PINS:
					GPIO.output(pin, binary[count])
					count += 1

except KeyboardInterrupt:
	print("\nCtrl+C pressed! the program is shutting down...")
finally:
	GPIO.cleanup()		# GPIO cleanup on exit
# --- #