asyncio.Queue(maxsize=0): 创建一个异步队列,用于协程间的通信。 asyncio.shield(task): 创建一个保护性Future,即使被取消也不会影响其底层任务的执行。 示例1: import asyncio async def print_message(): print("Hello print_message") return "Hello world
async def task(name, work_queue): timer = Timer(text=f"Task {name} elapsed time: {{:.1f}}") async with aiohttp.ClientSession() as session: while not work_queue.empty(): url = await work_queue.get() print(f"Task {name} getting URL: {url}") timer.start() async with session.g...
AI代码解释 importasyncioimportrandomimportaiohttpasyncdefproducer(queue):foriinrange(10):awaitqueue.put(i)awaitasyncio.sleep(random.randint(1,3))asyncdefconsumer(queue):whileTrue:sleep_time=awaitqueue.get()size=queue.qsize()print(f'当前队列有:{size} 个元素')url='http://httpbin.org/delay/2'...
async def producer(q, num_workers): print('producer: starting') # Add some numbers to the queue to simulate jobs for i in range(num_workers * 3): await q.put(i) print('producer: added task {} to the queue'.format(i)) # Add None entries in the queue # to signal the consumers...
asyncio.create_task(task("Two", work_queue)), )if__name__ =="__main__": asyncio.run(main()) 异步(非阻塞)HTTP调用 importasyncioimportaiohttpfromcodetimingimportTimerasyncdeftask(name, work_queue): timer = Timer(text=f"Task{name}elapsed time: {{:.1f}}")asyncwithaiohttp.ClientSession(...
asyncdefmain(): future=asyncio.Future() await future asyncio 的基本用法 1. 运行协程 要运行一个协程,你可以使用asyncio.run()函数。它会创建一个事件循环,并运行指定的协程。 实例 importasyncio asyncdefmain(): print("Start") await asyncio.sleep(1) ...
在Python3.5中,可以使用queue模块来创建多工作者协程。queue模块提供了线程安全的队列数据结构,可以用于在多个协程之间传递数据。 下面是一个示例代码,演示了如何使用queue模块创建多工作者协程: 代码语言:txt 复制 import asyncio import queue async def worker(queue): while True: item = await queue.get() #...
async def handle_task(task_id, work_queue): while not work_queue.empty(): # 如果队列不为空 queue_url = await work_queue.get() # 从队列中取出一个元素 if not queue_url in crawled_urls: crawled_urls.append(queue_url) # crawled_urls可以做一个去重操作 ...
再切回来继续执行 # put往队列放内容,get切回来继续执行拿数据,put/get两者的协调执行由调度器的ready队列保证 item = await q.get() print('Consuming', item) except QueueClosed: print('Consumer done') q = AsyncQueue() sched.new_task(producer(q, 10)) sched.new_task(consumer(q)) sched.run(...
importtimeimportredisimportasynciofromqueueimportQueuefromthreadingimportThreaddefstart_loop(loop):# 一个在后台永远运行的事件循环asyncio.set_event_loop(loop)loop.run_forever()asyncdefdo_sleep(x,queue):awaitasyncio.sleep(x)queue.put("ok")defget_redis():connection_pool=redis.ConnectionPool(host='127.0...