(self, blocking=True)
Execute events until the queue is empty.
        If blocking is False executes the scheduled events due to
        expire soonest (if any) and then return the deadline of the
        next scheduled call in the scheduler.

        When there is a positive delay until the first event, the
        delay function is called and the event is left in the queue;
        otherwise, the event is removed from the queue and executed
        (its action function is called, passing it the argument).  If
        the delay function returns prematurely, it is simply
        restarted.

        It is legal for both the delay function and the action
        function to modify the queue or to raise an exception;
        exceptions are not caught but the scheduler's state remains
        well-defined so run() may be called again.

        A questionable hack is added to allow other threads to run:
        just after an event is executed, a delay of 0 is executed, to
        avoid monopolizing the CPU when other threads are also
        runnable.
Execute events until the queue is empty.
        If blocking is False executes the scheduled events due to
        expire soonest (if any) and then return the deadline of the
        next scheduled call in the scheduler.
Execute events until the queue is empty . If blocking is False executes the scheduled events due to expire soonest ( if any ) and then return the deadline of the next scheduled call in the scheduler .
def run(self, blocking=True):
        """Execute events until the queue is empty.
        If blocking is False executes the scheduled events due to
        expire soonest (if any) and then return the deadline of the
        next scheduled call in the scheduler.

        When there is a positive delay until the first event, the
        delay function is called and the event is left in the queue;
        otherwise, the event is removed from the queue and executed
        (its action function is called, passing it the argument).  If
        the delay function returns prematurely, it is simply
        restarted.

        It is legal for both the delay function and the action
        function to modify the queue or to raise an exception;
        exceptions are not caught but the scheduler's state remains
        well-defined so run() may be called again.

        A questionable hack is added to allow other threads to run:
        just after an event is executed, a delay of 0 is executed, to
        avoid monopolizing the CPU when other threads are also
        runnable.

        """
        # localize variable access to minimize overhead
        # and to improve thread safety
        lock = self._lock
        q = self._queue
        delayfunc = self.delayfunc
        timefunc = self.timefunc
        pop = heapq.heappop
        while True:
            with lock:
                if not q:
                    break
                (time, priority, sequence, action,
                 argument, kwargs) = q[0]
                now = timefunc()
                if time > now:
                    delay = True
                else:
                    delay = False
                    pop(q)
            if delay:
                if not blocking:
                    return time - now
                delayfunc(time - now)
            else:
                action(*argument, **kwargs)
                delayfunc(0)
def run ( self , blocking = True ) : # localize variable access to minimize overhead # and to improve thread safety lock = self . _lock q = self . _queue delayfunc = self . delayfunc timefunc = self . timefunc pop = heapq . heappop while True : with lock : if not q : break ( time , priority , sequence , action , argument , kwargs ) = q [ 0 ] now = timefunc ( ) if time > now : delay = True else : delay = False pop ( q ) if delay : if not blocking : return time - now delayfunc ( time - now ) else : action ( * argument , * * kwargs ) delayfunc ( 0 )