def ask(self):
        """
        Return the wait time in seconds required to retrieve the
        item currently at the head of the queue.
        
        Note that there is no guarantee that a call to `get()` will
        succeed even if `ask()` returns 0. By the time the calling
        thread reacts, other threads may have caused a different
        item to be at the head of the queue.
        """
        with self.mutex:
            if not len(self.queue): 
                raise Empty
            utcnow = dt.datetime.utcnow()
            if self.queue[0][0] <= utcnow:
                self.ready.notify()
                return 0
            return (self.queue[0][0] - utcnow).total_seconds()
def ask(self):
        """
        Return the wait time in seconds required to retrieve the
        item currently at the head of the queue.
        
        Note that there is no guarantee that a call to `get()` will
        succeed even if `ask()` returns 0. By the time the calling
        thread reacts, other threads may have caused a different
        item to be at the head of the queue.
        """
        with self.mutex:
            if not len(self.queue): 
                raise Empty
            utcnow = dt.datetime.utcnow()
            if self.queue[0][0] <= utcnow:
                self.ready.notify()
                return 0
            return (self.queue[0][0] - utcnow).total_seconds()
def ask ( self ) : with self . mutex : if not len ( self . queue ) : raise Empty utcnow = dt . datetime . utcnow ( ) if self . queue [ 0 ] [ 0 ] <= utcnow : self . ready . notify ( ) return 0 return ( self . queue [ 0 ] [ 0 ] - utcnow ) . total_seconds ( )
Return the wait time in seconds required to retrieve the
        item currently at the head of the queue.
        
        Note that there is no guarantee that a call to `get()` will
        succeed even if `ask()` returns 0. By the time the calling
        thread reacts, other threads may have caused a different
        item to be at the head of the queue.
Return the wait time in seconds required to retrieve the item currently at the head of the queue . Note that there is no guarantee that a call to get () will succeed even if ask () returns 0 . By the time the calling thread reacts other threads may have caused a different item to be at the head of the queue .