小编gna*_*nar的帖子

我是Python 3的新手,正在玩asyncio.因此,我遇到了以下服务器端代码的奇怪行为:

import asyncio


@asyncio.coroutine
def handle_client(reader, writer):
    print('Client connected.')
    client_connected = True
    while client_connected:
        print('Waiting for client event.')
        line = yield from reader.readline()
        if line:
            print('Got: {}'.format(line))
            if line.decode() == 'echo\n':
                print('Sending back echo.')
                writer.write(line)
            else:
                print('Not sending back anything.')
        else:
            print('Client disconnected.')
            client_connected = False


if __name__ == '__main__':
    asyncio.async(asyncio.start_server(handle_client, 'localhost', 8888))
    asyncio.get_event_loop().run_forever()

当我运行这个客户端代码时(编辑:客户端代码手动输入到IPython会话中,服务器肯定有时间在关闭套接字之前写入)...

import socket
client = socket.create_connection(('localhost', 8888))
client.sendall('echo\n'.encode())
client.close()

...我从服务器收到错误回溯:

C:\Users\Gnar\Anaconda3\python.exe C:/Users/Gnar/Code/echo.py
Client connected.
Waiting for client event.
Got: b'echo\n'
Sending back echo.
Waiting for …