import signal
import sys
from time import sleep

SIGINT = False

def signal_handler(signal, frame):
    print('Ctrl + C received...')
    global SIGINT
    SIGINT = True

# Set up the signal handler

signal.signal(signal.SIGINT, signal_handler)

while True:
    # If Ctrl + C was pressed
    if SIGINT:
        print("Stopping loop since beginning...")
        break
    # While Ctrl + C hasn't been pressed
    print("Processing PDF...")
    sleep(1)