gistfile1.txt

import signal

class TimerException(Exception): pass

def timeout(signum, frame):
    print "signal handler exception", signum
    print frame
    raise TimerException(frame)

signal.signal(signal.SIGALRM, timeout)
signal.setitimer(signal.ITIMER_REAL, 0.05)

for x in xrange(1000000):
    print x

signal.alarm(0)