collectors.py 文件源码

def __init__(self, child, timelimit, greedy=False, use_alarm=True):
        """
        :param child: the collector to wrap.
        :param timelimit: the maximum amount of time (in seconds) to
            allow for searching. If the search takes longer than this, it will
            raise a ``TimeLimit`` exception.
        :param greedy: if ``True``, the collector will finish adding the most
            recent hit before raising the ``TimeLimit`` exception.
        :param use_alarm: if ``True`` (the default), the collector will try to
            use signal.SIGALRM (on UNIX).
        """
        self.child = child
        self.timelimit = timelimit
        self.greedy = greedy

        if use_alarm:
            import signal
            self.use_alarm = use_alarm and hasattr(signal, "SIGALRM")
        else:
            self.use_alarm = False

        self.timer = None
        self.timedout = False