Created
September 2, 2014 14:15
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Timeout decorator
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import signal | |
class TimeOut(Exception): | |
def __init__(self, msg='Time out error'): | |
super(Exception, self).__init__(msg) | |
def on_alarm(signum, frame): # при надходженні сигналу кидати виняток | |
raise TimeOut() | |
def limit_time(t, default=None): | |
signal.signal(signal.SIGALRM, on_alarm) # встановити обробник сигналу | |
def decorator(f): | |
def decorated(*args, **kwargs): | |
signal.alarm(t) # попросити ОС прислати нам сигнал через t секунд | |
try: | |
f(*args, **kwargs) | |
except TimeOut: | |
return default | |
return decorated | |
return decorator | |
import time | |
@limit_time(5) # працювати не довше 5 секунд | |
def test(): | |
for i in range(10): | |
print i | |
time.sleep(1) | |
test() |
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Декоратор який використовуючи сигнал Unix SIGALRM перериває роботу функції якщо та працює довше ніж задане число секунд