import RPi.GPIO as GPIO
from time import sleep
from mfrc522 import SimpleMFRC522

GPIO.setmode(GPIO.BOARD)

print(GPIO.getmode())
GPIO.setup(37, GPIO.IN)
GPIO.setup(36, GPIO.IN)
i = 0
while True :
    if GPIO.input(37) == 1:
        print("+")
        sleep(0.1)
    if GPIO.input(36) == 1:
        print("-")
        sleep(0.1)