解释一下代码,我们首先创建了一个继承自 Thread 的类 EchoThread,这个类用我们原来的 echo 函数的代码覆盖了 run 方法,但做了一些修改。首先将所有内容包装在一个 try catch 块中并拦截 OSError 异常,当关闭客户端套接字时,sendall 等方法会抛出此类异常。我们还检查来自 recv 的数据是否为空,数据为空有两种情...
在Python中，线程（Thread）和异步编程（Asyncio）都是处理并发执行任务的方式，它们各有优缺点，适用于不...
get_event_loop()只会在主线程创建新的event loop,其他线程中调用 get_event_loop() 则会报错t = Thread(target=thread_new_loop, args=(new_loop,))# 创建线程t.start()# 启动线程even = asyncio.run_coroutine_threadsafe(async_function(1), new_loop)# 调用asyncio.run_coroutine_...
Run in the default loop's executor ( 默认ThreadPoolExecutor ) # 第一步:内部会先调用 ThreadPoolExecutor 的 submit 方法去线程池中申请一个线程去执行func1函数,并返回一个concurrent.futures.Future对象 # 第二步:调用asyncio.wrap_future将concurrent.futures.Future对象包装为asycio.Future对象。 # 因为concur...
问跨不同事件循环调用asyncio.run_coroutine_threadsafeEN我在一个微服务中有一个类，如下所示：「事件...
问如何在asyncio中使用线程？EN摘要：本文介绍了如何使用Python的asyncio库和多线程实现高并发的异步IO操作...
The task is executed in the loop returned by get_running_loop(), RuntimeError is raised if there is no running loop in current thread. This function has been added in Python 3.7. Prior to Python 3.7, the low-level asyncio.ensure_future() function can be used instead: 通过这个方法我们...
import concurrent.futures import time def cpu_bound(number): return sum(i * i for i in range(number)) def find_sums(numbers): with concurrent.futures.ThreadPoolExecutor(max_workers=8) as executor: executor.map(cpu_bound, numbers) if __name__ == "__main__": nu...
import asyncioimport concurrent.futuresasync def do_something_blocking():# 在线程池中执行阻塞的IO操作with concurrent.futures.ThreadPoolExecutor() as pool:result = await loop.run_in_executor(pool, blocking_io_operation)return resultdef blocking_io_operation():# 执行一些阻塞的IO操作,比如网络请求或者...
instance, one can create Task that will run in a sub-thread loop (but loop.create_task() does this) or to passe a Future() that will be awaited on the sub-thread loop. The thing is that the documentation is (or used to be) light on the topic, and many people (including myself...