<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def timeout(seconds=None, use_signals=True, timeout_exception=TimeoutError, exception_message=None):
 """Add a timeout parameter to a function and return it. :param seconds: optional time limit in seconds or fractions of a second. If None is passed, no timeout is applied. This adds some flexibility to the usage: you can disable timing out depending on the settings. :type seconds: float :param use_signals: flag indicating whether signals should be used for timing function out or the multiprocessing When using multiprocessing, timeout granularity is limited to 10ths of a second. :type use_signals: bool :raises: TimeoutError if time limit is reached It is illegal to pass anything other than a function as the first parameter. The function is wrapped and returned to the caller. """

    def decorate(function):

        if not seconds:
            return function

        if use_signals:
            def handler(signum, frame):
                _raise_exception(timeout_exception, exception_message)

            @wraps(function)
            def new_function(*args, **kwargs):
                new_seconds = kwargs.pop('timeout', seconds)
                if new_seconds:
                    old = signal.signal(signal.SIGALRM, handler)
                    signal.setitimer(signal.ITIMER_REAL, new_seconds)
                try:
                    return function(*args, **kwargs)
                finally:
                    if new_seconds:
                        signal.setitimer(signal.ITIMER_REAL, 0)
                        signal.signal(signal.SIGALRM, old)
            return new_function
        else:
            @wraps(function)
            def new_function(*args, **kwargs):
                timeout_wrapper = _Timeout(function, timeout_exception, exception_message, seconds)
                return timeout_wrapper(*args, **kwargs)
            return new_function

    return decorate