import RPi.GPIO as GPIO


PUSH = [
21, #1
20, #2
16, #3
26 #4
]


RELAYS = [
[], #1
[], #2
[], #3
[]  #4
]

# Initialize
GPIO.setmode(GPIO.BCM)

# Push buttons
for i in PUSH:
  print("Init push button: " + str(i))
  GPIO.setup(i, GPIO.IN, pull_up_down=GPIO.PUD_UP)



# Infinite loop
while True:

  for num in range(0, len(PUSH)):

    if GPIO.input(PUSH[num]) == False:
      print("Button " + str(num) + " pressed")