import time, signal

hit = 0

def noop(*args):
    global hit
    hit += 1

signal.signal(signal.SIGINT, noop)
if hasattr(signal, 'SIGALRM'):
    signal.signal(signal.SIGALRM, noop)
    signal.setitimer(signal.ITIMER_REAL, 0.1, 0.1)

print("sleep 3 seconds... press CTRL+c multiple times")
t0 = time.monotonic()
time.sleep(3)
if hasattr(signal, 'SIGALRM'):
    signal.alarm(0)
dt = time.monotonic() - t0

print(dt, "elapsed")
print(hit, "signals")