Python編程實現打印任務監控

class PrintQueue:
    def __init__(self):
        self.items = []

    def is_empty(self):
        return len(self.items) == 0

    def enqueue(self, item):
        self.items.insert(0, item)

    def dequeue(self):
        return self.items.pop()

    def size(self):
        return len(self.items)


class Printer:
    def __init__(self, ppm):
        self.ppm = ppm
        self.current_task = None
        self.time_remaining = 0

    def tick(self):
        if self.current_task is not None:
            self.time_remaining -= 1
            if self.time_remaining <= 0:
                self.current_task = None

    def busy(self):
        return self.current_task is not None

    def start_next(self, new_task):
        self.current_task = new_task
        self.time_remaining = new_task.get_pages() * 60 / self.ppm


class Task:
    def __init__(self, time):
        self.time = time

    def get_pages(self):
        return self.time


def simulation(num_seconds, pages_per_minute):
    printer = Printer(pages_per_minute)
    print_queue = PrintQueue()
    waiting_times = []

    for current_second in range(num_seconds):
        if new_print_task():
            task = Task(random.randint(1, 20))
            print_queue.enqueue(task)

        if not printer.busy() and not print_queue.is_empty():
            next_task = print_queue.dequeue()
            waiting_times.append(next_task.time)
            printer.start_next(next_task)

        printer.tick()

    average_wait = sum(waiting_times) / len(waiting_times)
    print("Average Wait Time: {:.2f} seconds, {} tasks remaining.".format(average_wait, print_queue.size()))


def new_print_task():
    num = random.randint(1, 180)
    return num == 180


if __name__ == '__main__':
    import random
    for i in range(10):
        simulation(3600, 5)  # Simulate for 1 hour at 5 pages per minute

這段代碼實現了一個簡單的打印任務監控系統。它模擬了一個打印隊列和打印機，根據隨機生成的打印任務來模擬打印過程。在主程序中，我們可以調用simulation函數來運行模擬，輸出平均等待時間和剩余任務數。在這里，我們模擬了10次1小時內以每分鐘5頁的速度打印的情況。您可以根據實際需求調整模擬的時間和打印速度。