from functools import wraps
import errno
import os
import signal
 
class TimeoutError(Exception):
    pass
 
def timeout(seconds=10, error_message=os.strerror(errno.ETIME)):
    def decorator(func):
        def _handle_timeout(signum, frame):
            raise TimeoutError(error_message)
 
        def wrapper(*args, **kwargs):
            signal.signal(signal.SIGALRM, _handle_timeout)
            signal.alarm(seconds)
            try:
                result = func(*args, **kwargs)
            finally:
                signal.alarm(0)
            return result
 
        return wraps(func)(wrapper)
 
    return decorator

from timeout import timeout
 
# Timeout a long running function with the default expiry of 10 seconds.
@timeout
def long_running_function1():
    ...
 
# Timeout after 5 seconds
@timeout(5)
def long_running_function2():
    ...
 
# Timeout after 30 seconds, with the error "Connection timed out"
@timeout(30, os.strerror(errno.ETIMEDOUT))
def long_running_function3()